Download 3 Wireless Connection

HUAWEI TECHNOLOGIES CO., LTD.
FAQs on Access
Products V1.0
Products Dept of Device Global
Service Dept
2012.10
Huawei Device Co., Ltd. Bantian, Longgang District
Shenzhen 518129, P.R.China Tel: +86-755-28560808
FAQs on Access Products V1.0
Confidentiality
Contents
Contents ............................................................................................................................................. 2
1 General ............................................................................................................................................ 5
1.1 How can I install a Huawei gateway? .............................................................................................................. 5
1.2 I failed to log in to the HG web management page at 192.168.1.1 or 192.168.3.1 the first time I connected
my PC to the HG. What can I do? .......................................................................................................................... 7
1.3 How can I set a fixed IP address for my PC? ................................................................................................. 17
1.4 My PC displays a message, indicating that the IP address has been used by another PC. What can I do? .... 21
1.5 I forgot the password for logging in to the device. What can I do? ................................................................ 24
1.6 How can I view the hardware and software versions of the device? .............................................................. 25
1.7 How can I use a Huawei LAN uplink gateway as a switch? .......................................................................... 25
1.8 After my PC is connected to a gateway, I can access the Internet but cannot access My Network Places.
What can I do? ..................................................................................................................................................... 27
1.9 How can I change the password for logging in to the Device? ...................................................................... 34
1.10 How can I restore the Device to its default settings? ................................................................................... 34
1.11 How can I upgrade the software of the device? ............................................................................................ 35
1.12 How can I check whether a network port of the Device is faulty? ............................................................... 35
1.13 When I log in to the device web management page, a message is displayed, indicating that a dialup
connection is set on my PC. What can I do? ........................................................................................................ 36
1.14 When I log in to the device web management page, a dialog box is displayed, indicating that the web page
is unavailable. What can I do?.............................................................................................................................. 37
2 Internet Access ............................................................................................................................. 39
2.1 How can I set quick Internet access on the device web management page? .................................................. 39
2.2 How can I set a dynamic or static IP address for Internet access? ................................................................. 47
2.3 How can I set a PPPoE dialup? ...................................................................................................................... 50
2.4 How can I change an administrator's IP address and IP address pool? ........................................................... 51
2.5 My ADSL modem cannot synchronize with the device at the central office. What can I do?........................ 52
2.6 My ADSL modem goes offline frequently. What can I do? ........................................................................... 53
2.7 My ADSL modem does not work properly and failed to establish a dialup connection in bridging mode.
What can I do? ..................................................................................................................................................... 54
2.8 "Error 678" is displayed when attempt to establish a dialup connection after my device is properly set. What
can I do? ............................................................................................................................................................... 54
2.9 What are the common PPPoE dialup error codes and corresponding solutions? ........................................... 57
2.10 Web pages are opened slowly or fail to be opened, and I cannot receive emails. What can I do? ............... 58
2.11 Why cannot I send an email with attachments? ............................................................................................ 58
2.12 What is ARP spoofing? How can I identity an ARP spoofing attack? .......................................................... 59
2.13 My gateway cannot work properly because other users on the LAN often watch web TV or download files
using BT. What can I do? ..................................................................................................................................... 61
2.14 I connect only two PCs to my gateway. However, the Internet access rate is low. What can I do?.............. 61
2.15 A PC can access the Internet but another PC fail to do so. What can I do? .................................................. 61
2.16 One of my computers connected to the device cannot display web pages. What can I do? ......................... 72
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2.17 After I connect my PC to the device, the MSN fails to set up a video call, but other applications are normal.
What can I do? ..................................................................................................................................................... 74
2.18 The Internet access rate becomes low after I connect my PC to the device. What can I do? ....................... 74
2.19 Why can I use QQ but cannot display any web page? ................................................................................. 75
2.20 When I connect my PC to the devide, a message is displayed, indicating that my PC is obtaining an IP
address and no connection is set up on the WAN port. What can I do? ............................................................... 77
2.21 Why cannot I hear voices when using QQ to set up video calls? ................................................................. 80
2.22 Why cannot I play Happy Farm and QQ Ranch on my PC connected to the device? .................................. 82
2.23 How often does the DHCP server clear the customer information list? ....................................................... 83
3 Wireless Connection ................................................................................................................... 84
3.1 A dialog box is displayed when I connect my PC to a WLAN, indicating that the Windows was unable to
connect to selected. What can I do? ..................................................................................................................... 84
3.2 A dialog box is displayed when I connect my PC to a WLAN, indicating that my PC is connected to XX (an
SSID) but does not have rights to access the Internet. What can I do? ................................................................ 86
3.3 When I install the drive for my wireless network adapter, a message is displayed, indicating that the adapter
name is already in use as a service name or a service display name. What can I do? .......................................... 86
3.4 Why can my wireless network adapter detect the wireless signal but cannot connect to my WLAN? .......... 87
3.5 What can I do if I forgot my WLAN's key? ................................................................................................... 90
3.6 How can I prevent other users from embezzling my WLAN? ....................................................................... 90
3.7 How can I enable and view the WLAN settings on my PC running Windows XP? ...................................... 92
3.8 A message is displayed when I connect my PC to a WLAN, indicating that the Windows cannot find a
certificate for connecting to the network. What can I do? .................................................................................... 96
3.9 When I enter the key of my WLAN, a dialog box is displayed, indicating that the key must consist of 40 or
104 bits. What can I do? ....................................................................................................................................... 99
3.10 A dialog box is displayed when I connect my PC to a WLAN, indicating that the current WLAN settings do
not support connection to an AP network. What can I do? ................................................................................. 100
3.11 When I connect my PC running Windows Vista to a WLAN, a message is displayed, indicating that the
WLAN settings saved on the PC do not meet network requirements. What can I do? ...................................... 102
3.12 Why can my laptop detect the SSIDs of other WLANs but cannot detect the SSID of my WLAN? ......... 103
3.13 My PC has connected to the WLAN but is occasionally disconnected. What can I do? ............................ 104
3.14 What are the factors that affect the wireless signal transmission? How can I improve the signal
transmission quality in the existing network environment? ............................................................................... 105
3.15 How can I encrypt my WLAN? Which security modes are supported by a Huawei gateway? .................. 106
3.16 My wireless network adapter supporting IEEE 802.11n provides a connection rate less than 100 Mbit/s
after connecting to the device. What can I do?................................................................................................... 106
3.17 How can I encrypt my WLAN? Which security modes are supported by a Huawei gateway? .................. 107
3.18 How can I configure my device as a switch? ............................................................................................. 108
3.19 What is the MAC address clone function used for? ................................................................................... 109
4 Advanced Settings .................................................................................................................... 112
4.1 How can I control access rights to prevent kids from accessing to certain websites or applications? ......... 112
4.2 What is a DMZ host? What is a DMZ host used for? .................................................................................. 115
4.3 How can I configure a DDNS?..................................................................................................................... 116
4.4 What is port mapping (virtual server configuration)? How can I set a port mapping rule?.......................... 117
4.5 How can I set a bandwidth control rule (manage traffic)? ........................................................................... 118
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4.6 How can I enable the UPnP function? .......................................................................................................... 118
4.7 An internal server cannot be accessed from an external network after a virtual server is set. What can I do?
............................................................................................................................................................................ 119
4.8 Does a Huawei Gateway support the UPnP? What is UPnP? ...................................................................... 120
4.9 How can I enable the UPnP in the OS after enabling the UPnP on the gateway? ........................................ 120
4.10 The domain name filtering rule I set does not take effect. What can I do? ................................................ 120
4.11 An internal server cannot be accessed from an external network after port mapping. What can I do? ...... 122
4.12 Why cannot I establish a dialup connection after I power off and on my gateway? .................................. 124
4.13 How can I set a wireless distribution system? ............................................................................................ 124
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1 General
1.1 How can I install a Huawei gateway?
To install a Huawei gateway:
Step 1 If your Internet service provider (ISP) provides network services through a digital subscriber
line (DSL) port, install a Huawei HG5xx or HG6xx series gateway (HG5xx and HG6xx for
short), as shown in Figure 1-1.
Figure 1-1 Connecting a HG5xx or HG6xx
Step 2 If your ISP provides network services through a local area network (LAN) port, install a
Huawei HG2xx series gateway (HG2xx for short) or a WS325 or WS880, as shown in Figure
1-2.
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Figure 1-2 Connecting a HG2xx
Step 3 Check that all indicators on your gateway work properly.
The WS325 is used as an example to illustrate the indicators and their states, as shown in
Table 1-1.
Table 1-1 WS325 indicators
Indicator
Status
Description
Steady green
The WS325 is powered on.
Off
The WS325 is not powered on.
Steady red
A network cable is connected to the wide area network (WAN) port in
routing mode, but no IP address has been obtained.
Steady green
An IP address has been obtained on the WAN port, and the WS325 can
connect to the Internet.
Blinking
green
An IP address has been obtained on the WAN port in routing mode, and
data traffic is generated.
Steady red
A network cable is connected to the WAN port in bridging mode, but no
data traffic is generated.
Blinking red
Data traffic is generated in bridging mode.
Off
The WS325 is not powered on, or the WAN port is not connected to a
network cable.
Steady green
The WS325 is correctly connected to the wireless local area network
Power
Internet
WLAN
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Status
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Description
(WLAN), but no data is being transmitted.
WPS
LAN1–LA
N4
Blinking
green
The WS325 is correctly connected to the WLAN, and data is being
transmitted.
Off
The Wi-Fi function is disabled.
Steady green
A wireless client is connected to the WS325 using the Wi-Fi protected setup
(WPS) function. The indicator turns green for 300 seconds.
Blinking
green
A connection between the WS325 and a wireless client (for example, a PC
with a wireless network adapter) is being set up using the WPS function.
The WPS indicator blinks green for no longer than 120 seconds.
Off
The WPS function is not enabled on the WS325 or has been enabled for
more than 300 seconds.
Steady green
A network cable is connected to the fast Ethernet (FE) port, but no data is
being transmitted.
Blinking
green
A network cable is connected to the FE port, and data is being transmitted.
Off
The WS325 is not powered on, or no LAN port is connected to a network
cable.
----End
1.2 I failed to log in to the HG web management page at
192.168.1.1 or 192.168.3.1 the first time I connected my PC
to the HG. What can I do?
Error! Reference source not found. shows the page displayed upon a login failure.
Figure 1-3 Login failure
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Take WS325 for example, to resolve this problem:
Step 1 Check that the entered maintenance IP address is correct.
Generally, 192.168.1.1 is the maintenance IP address for DSL uplink gateways, and
192.168.3.1 is the maintenance IP address for LAN uplink gateways. You can find the
gateway maintenance IP address on its nameplate, as shown in Figure 1-4.
Figure 1-4 Maintenance IP address on the nameplate
Step 2 Choose Start > Run on the desktop. In the Run dialog box, enter cmd, and click OK, as
shown in Figure 1-5.
Figure 1-5 Entering cmd
Step 3 In the command line window, enter ping 192.168.3.1, and press Enter, as shown in Figure
1-6.
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Figure 1-6 Entering ping 192.168.3.1
If the connection between the WS325 and PC is normal, the window shown Figure 1-7 is
displayed.
Figure 1-7 Connection succeeded
If the connection between the WS325 and PC fails, "Request timed out" is displayed, as
shown in Figure 1-8.
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Figure 1-8 Connection failure
Step 4 If the connection between the WS325 and PC is normal, perform the following operations:
1.
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Launch the Internet Explorer, and choose Tools > Internet Options. In the displayed
dialog box, click the Connections tab page, then LAN settings, as shown in Figure 1-9,
to check whether a proxy server IP address is specified.
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Figure 1-9 Checking proxy server IP address
2.
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If a proxy server IP address is set, click Advanced, as shown in Figure 1-10.
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Figure 1-10 Clicking Advanced
3.
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Add the maintenance IP address to Exceptions, as shown in Figure 1-11.
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Figure 1-11 Adding the maintenance IP address in Exceptions
4.
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If the problem persists, choose Tools > Internet Options. In the displayed dialog box,
click the General tab page, then Delete, as shown in Figure 1-12.
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Figure 1-12 Clearing Internet temporary files and cookies
5.
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In the displayed dialog box, select Temporary Internet files and Cookies, as shown
Figure 1-13.
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Figure 1-13 Selecting Temporary Internet files and Cookies
You can then log in to the WS325 web management page, as shown in Figure 1-14.
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Figure 1-14 WS325 web management page
If the connection between the WS325 and PC fails, check that the network cable is normal. The
network cable must be connected to the PC's LAN port and one of the gateway's LAN ports, as
shown in Figure 1-15.
Figure 1-15 Connecting the network cable
5
6
1
c
a
4
b
3
2
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(Common mistake: The network cable is connected to the PC's LAN port and the gateway's
WAN port.)
Step 5 If the problem persists, contact your local ISP.
----End
1.3 How can I set a fixed IP address for my PC?
To set network parameters on a PC running Windows 2000 or Windows XP:
Step 1 Right-click My Network Places on the desktop, and select Properties.
Step 2 In the Network Connections window, right-click Local Area Connection, and select
Properties.
Step 3 Click the General tab page, and double-click Internet Protocol (TCP/IP).
Step 4 If your gateway uses default settings, set the host parameters as follows:
IP address: 192.168.3.X (2–254)
Subnet mask: 255.255.255.0
Default gateway: 192.168.3.1
Step 5 Enter the local DNS address. If you do not know it, contact your local ISP.
Figure 1-16 shows host settings on a PC running Windows 2000 or Windows XP.
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Figure 1-16 Host settings on a PC running Windows 2000 or Windows XP
You can click Obtain an IP address automatically to obtain the IP address automatically.
You are advised to specify an IP address for the DNS.
----End
To set network parameters on a PC running Windows 7:
Step 1 Right-click Network on the desktop, and select Properties. In the displayed window, click
Change adapter settings, as shown in Figure 1-17.
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Figure 1-17 Clicking Change adapter settings
Step 2 On the right pane, right-click Local Area Connection, and select Properties.
Step 3 Click the Networking tab page, select Internet Protocol Version 4 (TCP/IPv4), and click
Properties, as shown in Figure 1-18.
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Figure 1-18 Selecting Internet Protocol Version 4 (TCP/IPv4)
Step 4 If your gateway uses default settings, set the host parameters as follows:
IP address: 192.168.3.X (2–254)
Subnet mask: 255.255.255.0
Default gateway: 192.168.3.1
Step 5 Enter the local DNS address. If you do not know it, contact your local ISP.
Figure 1-19 shows host settings on a PC running Windows 7.
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Figure 1-19 Host settings on a PC running Windows 7
----End
1.4 My PC displays a message, indicating that the IP
address has been used by another PC. What can I do?
The cause is that another PC connected to the same gateway is using the same IP address as
yours. As a result, you cannot access the Internet.
Possible causes are as follows:


Your PC is using the default IP address of the gateway: 192.168.1.1 or 192.168.3.1. All
PCs connected to the gateway cannot use the two IP addresses and can use an IP address
from the following ranges:
−
192.168.1.2 to 192.168.1.254
−
192.168.3.2 to 192.168.3.254
The IP address of another PC is changed to the same as yours.
In case of an IP address conflict, change your IP address as follows:
Step 1 Right-click My Network Places on the desktop, and select Properties, as shown in Figure
1-20.
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Figure 1-20 Selecting Properties
Step 2 In the displayed window, right-click Local Area Connection, and select Properties, as
shown in Figure 1-21.
Figure 1-21 Selecting Properties
Step 3 Click the General tab page, and double-click Internet Protocol (TCP/IP), as shown in
Figure 1-22.
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Figure 1-22 Double-clicking Internet Protocol (TCP/IP)
Step 4 In the displayed dialog box, change the IP address and DNS address, as shown in Figure 1-23.
If the dynamic host configuration protocol (DHCP) is enabled, you can also obtain them
automatically. To do so, click Obtain an IP address automatically and Obtain DNS server
address automatically, then OK.
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Figure 1-23 Changing the IP address and DNS address
----End
1.5 I forgot the password for logging in to the device. What
can I do?
Take WS235 for example, if you forget your user name or password; restore your gateway to
its default settings.
To restore the WS325 to its default settings:
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
Use a sharp object (for example, a paperclip) to push and hold the Reset button for about
6 seconds, and then release it.

Log in to the WS325 web management page, choose Maintenance > Device. Click the
Reset tab page, then Restore Default Settings, as shown in Figure 1-24.
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Figure 1-24 Restoring the WS325 to its default settings
1.6 How can I view the hardware and software versions of
the device?
Take WS235 for example, log in to the WS325 web management page, and choose Status >
Device Information. You can then see the hardware and software versions, as shown in
Figure 1-25.
Figure 1-25 Hardware and firmware version information
1.7 How can I use a Huawei LAN uplink gateway as a
switch?
A Huawei gateway integrates the functions of a switch.
Take WS235 for example, to use a Huawei gateway as a switch:
Step 1 Connect the front-end gateway to the uplink LAN port of the gateway serving as a switch and
your PC to the downlink LAN port
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Step 2 Choose Basic > LAN. Click the DHCP tab page, and change the maintenance IP address of
the gateway serving as a switch, as shown in Figure 1-26.
Figure 1-26 Changing the maintenance IP address
Ensure that the new IP address does not conflict with the IP address of the front-end router (that is,
ensure that they are not in the same network segment).
The default IP address of a Huawei LAN uplink gateway is 192.168.3.1. If the IP address of the
front-end router is in the network segment 192.168.3.X, change it to a different one.
Step 3 Disable the DHCP function for the front-end gateway to allocate an IP address, as shown in
Figure 1-27.
If the DHCP function is not disabled, your PC cannot obtain correct network parameters, and
you cannot access the Internet.
Figure 1-27 Disabling the DHCP function
----End
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1.8 After my PC is connected to a gateway, I can access the
Internet but cannot access My Network Places. What can I
do?
By default, a Huawei gateway allows PCs on a LAN to visit each other.
Common access failures to My Network Places and corresponding solutions are as follows:

No resource is shared or the sharing service is not enabled.
Symptom: PC A and B can be connected but cannot access the shared resources. When
you choose System tools > Local Users and Groups, a dialog box is displayed,
indicating that no server service is enabled.
To resolve this problem:
Step 1 Click Start on the desktop, right-click Control Panel, and select Explore.
Step 2 In the Control Panel window, choose Control Panel > Administrative Tools.
Step 3 Double-click Services. In the displayed window, right-click Server, and select
Properties, as shown in Figure 1-28.
Step 4 In the displayed dialog box, set Startup type to Automatic.
Figure 1-28 Service window
----End

IP settings are incorrect.
Symptom: PC A and B on both of which no firewall is installed cannot be connected.
To resolve this problem, check that the two PC's IP addresses are in the same network
segment and the subnet masks are consistent, as shown in Figure 1-29.
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Figure 1-29 Checking IP addresses and subnet masks

Default settings of Windows XP are incorrect.
Symptom: You cannot access a PC running Windows XP from another PC running
Windows 98, Windows 2000, or Windows Server 2003.
To resolve this problem:
Step 1 Choose Start > Control Panel on the desktop. In the Control Panel window, click User
Accounts.
Step 2 In the User Accounts window, click User Accounts.
Step 3 In the User Accounts dialog box, click Add to add user Guest.
Step 4 Choose Start > Run on the desktop, enter secpol.msc, and click OK.
The Local Security Settings window is displayed, as shown in Figure 1-30.
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Figure 1-30 Local Security Settings window
Step 5 Choose Local Policies > User Rights Assignment, and double-click Access this PC
from the network. In the displayed dialog box, click the Local Security Setting tab
page, then Add User or Group to add user Guest, as shown in Figure 1-31.
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Figure 1-31 Adding user Guest
Step 6 Choose Local Policies > Security Options, as shown in Figure 1-32.
Figure 1-32 Selecting Security Options
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Step 7 Double-click Accounts: Limit local account use of blank passwords to console logon
only, as shown in Figure 1-33. In the displayed dialog box, click Disabled.
Figure 1-33 Disabling a policy
----End

Occasionally, the user name field in the Login window is dimmed and keeps displaying
Guest when you log in to a PC running Windows XP.
To resolve this problem, choose Local Policies > Security Options, double-click
Network access: Sharing and security model for local accounts, and select Network
access: Sharing and security model for local accounts from the drop-down list box.

The loophole repair software has changed security policies.
Symptom: You can view neighbor PCs from My Network Places but cannot access them,
and a dialog box is displayed, indicating that you have no right to access the network.
To resolve this problem:
Step 1 Choose Start > Run on the desktop, enter secpol.msc, and click OK.
Step 2 On the displayed window, choose Local Policies > User Rights Assignment, and
double-click Deny access to this PC from the network, as shown in Figure 1-34.
Step 3 Click the Local Security Setting tab page, select Guest, and click Delete.
Figure 1-34 Deleting user Guest
----End
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Firewall rules are improperly set.
Symptom: The connection between the PC and gateway fails when a firewall is installed
(including the built-in firewall of Windows XP) or a message is displayed when you
access the shared resources, indicating:
−
XXX cannot be accessed.
−
You may have no right to use the network resource.
−
You have to check your right with your administrator.
−
Network path cannot be found.
To resolve this problem, disable your firewall or add a LAN access rule.
To add a LAN access rule on a PC running windows XP:
Step 1 Choose Start > Control Panel on the desktop.
Step 2 In the Control Panel window, click Network and Internet Connections. In the
displayed window, click Windows Firewall.
Step 3 In the displayed dialog box, click the Exceptions tab page, and select File and Printer
Sharing.
----End

A PC running Windows 2000 or Windows XP and a PC running Windows 98 cannot
access each other.
Symptom: The connection between a PC running Windows 2000 or Windows XP and a
PC running Windows 98 is normal, but the two PCs cannot access each other from My
Network Places.
To resolve this problem:
Step 1 Click Start on the desktop of Windows 2000 or Windows XP, right-click Control Panel,
and select Explore.
Step 2 In the Control Panel window, choose Control Panel > Administrative Tools, and
double-click PC Management.
Step 3 Choose Local Users and Groups > Users, right-click Guest, and select Properties, as
shown in Figure 1-35.
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Figure 1-35 Selecting user Guest
Step 4 Click the General tab page, and clear Account is disabled, as shown in Figure 1-36.
Figure 1-36 Clearing Account is disabled
(Note: The File and Printer Sharing check box may be cleared on the PC running Windows
98. Repeat the preceding steps and reselect it.)
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----End
1.9 How can I change the password for logging in to the
Device?
Take WS325 for example, log in to the WS325 web management page, and choose
Maintenance > Account. Click the Account tab page, specify New User Name, Current
Password, and New Password, and click Submit, as shown in Figure 1-37. The longer the
signal strength bar is, the more secure the new password is.
Figure 1-37 Changing the current password
1.10 How can I restore the Device to its default settings?
Take WS325 for example, to restore the WS325 to its default settings:

Use a sharp object (for example, a paperclip) to push and hold the Reset button for about
6 seconds, and then release it.

Log in to the WS325 web management page, choose Maintenance > Device. Click the
Reset tab page, then Restore Default Settings, as shown in Figure 1-38.
Figure 1-38 Restoring the WS325 to its default settings
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1.11 How can I upgrade the software of the device?
Take WS325 for example, to upgrade the software of the WS325:
Step 1 Obtain the software of the latest version.
Step 2 Log in to the WS325 web management page, choose Maintenance > Device.
Step 3 Click the Firmware Upgrade tab page, then Browse to select the software of the latest
version, and click Firmware Upgrade, as shown in Figure 1-39.
The upgrade process may take a few minutes. Do not power off the WS325 during this process.
Otherwise, an unrecoverable error may occur.
Figure 1-39 Upgrading software
----End
1.12 How can I check whether a network port of the
Device is faulty?
Take WS325 for example, to check whether a network port of the WS325 is faulty:
Step 1 Connect your PC to the port using a network cable.
Step 2 Log in to the WS325 web management page, and choose Maintenance > Diagnose. Click the
Diagnose tab page, enter the administrator's IP address (192.168.3.1 by default), and click
Start, as shown in Figure 1-40.
The ping function starts running and will return a message later to inform you whether the
port is faulty.
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Figure 1-40 Diagnosing a fault
----End
1.13 When I log in to the device web management page, a
message is displayed, indicating that a dialup connection
is set on my PC. What can I do?
The cause is that a default dialup connection is set on your PC.
Take WS325 for example, to resolve this problem:
Step 1 Launch the Internet Explorer, and choose Tools > Internet Options.
Step 2 In the displayed dialog box, click the Connections tab page, then Never dial a connection, as
shown in Figure 1-41.
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Figure 1-41 Clicking Never dial a connection
----End
1.14 When I log in to the device web management page, a
dialog box is displayed, indicating that the web page is
unavailable. What can I do?
Figure 1-42 shows the Webpage unavailable while offline dialog box.
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Figure 1-42 Webpage unavailable while offline dialog box
The cause is that your Internet Explorer is improperly set.
To resolve this problem, launch a browser, click File, and clear Work Offline, as shown in
Figure 1-43.
Figure 1-43 Clearing Work Offline
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2 Internet Access
2.1 How can I set quick Internet access on the device web
management page?
Take WS325 for example, to set quick Internet access on the WS325 web management page:
Step 1 Launch the Internet Explorer, enter the WS325's maintenance IP address (192.168.3.1 by
default), and press Enter. In the Login window, enter the user name and password (both are
admin by default), and click Login, as shown in Figure 2-1.
Figure 2-1 Entering the user name and password
Step 2 On the displayed page, click Setup Wizard, as shown in Figure 2-2.
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Figure 2-2 Clicking Setup Wizard
Step 3 Select a connection type, as shown in Figure 2-3.
Figure 2-3 Selecting a connection type

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To access the Internet using broadband PPPoE dialup, select PPPoE, specify Username
and Password, and click Next, as shown in Figure 2-4.
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Figure 2-4 Selecting PPPoE

To access the Internet using DHCP:
1.
Select DHCP, and click Next, as shown in Figure 2-5.
Figure 2-5 Selecting DHCP
2.
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In the Local Area Connection window, click the General tab page, then Properties, as
shown in Figure 2-6.
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Figure 2-6 Clicking Properties
3.
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In the displayed dialog box, double-click Internet Protocol (TCP/IP), as shown in
Figure 2-7.
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Figure 2-7 Double-clicking Internet Protocol (TCP/IP)
4.
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In the displayed dialog box, click Obtain an IP address automatically, then OK, as
shown in Figure 2-8.
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Figure 2-8 Clicking Obtain an IP address automatically
The gateway will automatically allocate an IP address to your PC, as shown in Figure 2-9.
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Figure 2-9 IP address allocated automatically
You can also access the Internet using a static IP address after you set Connection type to
DHCP.
To do so, repeat operations 1, 2, and 3, and then click Use the following IP address to enter a
static IP address ranging from 192.168.3.2 to 192.168.3.254, as shown in Figure 2-10.
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Figure 2-10 Entering a static IP address
Figure 2-11 shows the IP address specified manually.
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Figure 2-11 IP address specified manually
----End
2.2 How can I set a dynamic or static IP address for
Internet access?
Take WS325 for example, to set a dynamic or static IP address for Internet access:
Step 1 Launch the Internet Explorer, enter the WS325's maintenance IP address (192.168.3.1 by
default), and press Enter. In the Login window, enter the user name and password (both are
admin by default), and click Login.
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Figure 2-12 Entering the user name and password
Step 2 On the displayed page, choose Basic > WAN.
The WAN Connection page is displayed, as shown in Figure 2-13.
Figure 2-13 WAN Connection page
Step 3 Set Connection type to DHCP, as shown in Figure 2-14.
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Figure 2-14 Setting Connection type to DHCP
Step 4 Set Connection type to Static IP, and specify other parameters, as shown in Figure 2-15.
Figure 2-15 Setting Connection type to Static IP
You can also enter an address for your DNS, as shown in Figure 2-16.
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Figure 2-16 Entering a DNS address
----End
2.3 How can I set a PPPoE dialup?
Take WS325 for example, to set a PPPoE dialup:
Step 1 Launch the Internet Explorer, enter the WS325's maintenance IP address (192.168.3.1 by
default), and press Enter. In the Login window, enter the user name and password (both are
admin by default), and click Login.
Figure 2-17 Entering the user name and password
Step 2 On the displayed page, choose Basic > WAN.
The WAN Connection page is displayed, as shown in Figure 2-18.
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Figure 2-18 WAN Connection page
Step 3 Set Connection type to PPPoE, and enter the user name and password provided by your ISP,
as shown in Figure 2-19.
You can set Connection trigger to AlwaysOn, Manual, or On Demand.
Figure 2-19 Setting a PPPoE dialup
----End
2.4 How can I change an administrator's IP address and IP
address pool?
Take WS325 for example, on the WS325 web management page, choose Basic > LAN. Click
the DHCP tab page, change the IP address under LAN Host Settings, or change the start and
end IP addresses under DHCP Server, as shown in Figure 2-20.
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Figure 2-20 Changing the IP address or start and end IP addresses
2.5 My ADSL modem cannot synchronize with the device
at the central office. What can I do?
Connect your ADSL modem to a telephone cable to determine whether your ADSL modem
synchronizes with the device at the central office:

If the ADSL indicator blinks for about 1 minutes and turns steady on, your ADSL
modem has synchronized with the broadband access server (BAS) of your ISP.

If the ADSL indicator keeps blinking, your ADSL modem fails to synchronize with the
BAS of your ISP.
To resolve this problem:
Step 1 Check that the cables and ADSL splitter are properly connected, as shown in Figure 2-21.
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Figure 2-21 Connecting the ADSL splitter
Description:

The ADSL line connects to the LINE port.

The ADSL modem connects to the MODEM port.

The telephone connects to the PHONE port.
Step 2 Contact your local ISP to check that your ADSL line is working properly.
Step 3 Update the software of your ADSL modem to the latest version released at
http://www.huaweidevice.com.
----End
2.6 My ADSL modem goes offline frequently. What can I
do?
To resolve this problem:

If your ADSL modem works only as a bridge, check parameters, such as Line
Attenuation, SNR Margin, and Line Rate on the ADSL modem's web management
page.
If the value of SNR Margin is less than 10 dB (the normal range is 15–40 dB), the
ADSL line quality is poor. If these parameter values are abnormal, contact your local
ISP.
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
If your ADSL modem's routing function is enabled, perform the following operations:
1.
Check that no viruses or address resolution protocol (ARP) spoofing exits on the LAN.
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2.
Check that no PC on the LAN is downloading files using P2P software, such as Xunlei
or BitTorrent (BT), resulting in insufficient bandwidth resources.
3.
Check that your ADSL modem is not overloaded due to a large number of PCs on the
LAN.
4.
With comparison to a dedicated broadband gateway, an ADSL modem provides low
routing capability. You are advised not connect more than five PCs to the ADSL modem
when the routing function is enabled.
5.
Update the software of your ADSL modem to the latest version released at
http://www.huaweidevice.com.
2.7 My ADSL modem does not work properly and failed
to establish a dialup connection in bridging mode. What
can I do?
To resolve this problem:
Step 1 Check the status of the Power, LAN, and ADSL indicators.

If your ADSL modem initiation fails, the Power indicator is off. Check whether the
power adapter is compatible with your ADSL modem. If yes, your ADSL modem has
hardware faults.

If the LAN port is faulty or is incompatible with the network adapter interface, the LAN
indicator is off.

If your ADSL modem fails to synchronize with the BAS of your ISP, the ADSL indicator
keeps blinks.
Step 2 Check that the cables and ADSL splitter are properly connected.
Step 3 Contact your local ISP to check that your ADSL line is working properly.
Step 4 Update the software of your ADSL modem to the latest version released at
http://www.huaweidevice.com.
Step 5 If all indicators are normal, contact your local ISP to check that broadband access server
(BAS) is working properly.
----End
2.8 "Error 678" is displayed when attempt to establish a
dialup connection after my device is properly set. What
can I do?
Take WS325 for example, if your WS325 is properly connected and the connection type is set
to PPPoE, you can access the Internet without dialing on your PC.
To access the Internet, connect your WS325 to a LAN port using a network cable. If the
DHCP function is enabled, you can specify an IP address or have the WS325automatically
allocate an IP address to your PC.
To obtain an IP address:
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Step 1 Log in to the WS325 web management page, and choose Basic > WAN. On the WAN
connection page, set Connection Type to DHCP, as shown in Figure 2-22.
Figure 2-22 Enabling the DHCP function
Step 2 Right-click My Network Places on the desktop, and select Properties. In the displayed
window, right-click Local Area Connection, and select Properties.
Step 3 In the displayed dialog box, select Internet Protocol (TCP/IP), and click Properties.
Step 4 Click the General tab page, then Obtain an IP address automatically, and click OK, as
shown in Figure 2-23.
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Figure 2-23 Clicking Obtain an IP address automatically
The specified IP address must be in the same network segment as that of your gateway's LAN
port. For example, if the IP address of your gateway's LAN port is 192.168.3.1, the host
settings are as follows:

Fixed IP address of your PC: 192.168.3.X (1 < X < 254)

Default gateway: 192.168.3.1

DNS: 192.168.3.1
Figure 2-24 shows how to configure host settings.
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Figure 2-24 Host settings
----End
2.9 What are the common PPPoE dialup error codes and
corresponding solutions?

Error 691: The connection fails because the entered user name or password is invalid.
Possible causes:
−
The entered user name or password is incorrect.
−
Your last dialup connection is accidentally disconnected. Your ISP's broadband
remote access server (BRAS) receives no information about the disconnection and
does not delete your service account from the online account list. As a result, the
BRAS considers that you are already online but still dialing.
−
Your service account is locked because it is in arrears or your broadband service has
expired.
−
The BRAS has invalidated your service account.
To resolve this problem:
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1.
Check that the spelling, uppercase, and lowercase of the entered user name and password
are correct.
2.
Wait for a few minutes or restart the modem, and try again.
3.
Contact your local ISP to check that your broadband service account is not in arrears.
4.
If the problem persists, contact your ISP.

Error 619: The connection to the specified server fails because the port is disabled.
Possible causes:
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An error occurs during you last connection, and the interval between dialup attempts is
too short. As a result, the server cannot respond to the entered user name and password.
To resolve this problem, dial again after 1 or 2 minutes.

Error 718: The connection is disconnected because the remote PC does not respond.
Possible causes:
A BAS (or the RADIUS server) of your ISP is faulty.
To resolve this problem, dial again after a while. If the problem persists, contact your
local ISP.

Error 769: The connection to a specific server fails.
Possible causes:
Network connection settings on your PC are incorrect.
To resolve this problem:
1.
Right-click My Network Places on the desktop, and select Properties.
2.
Check whether your local connection is disabled.
3.
If yes, right-click Local Connection, and select Enable.
4.
If you cannot find the Local Connection icon, reinstall the drive for your network
adapter.
2.10 Web pages are opened slowly or fail to be opened,
and I cannot receive emails. What can I do?
To resolve this problem:
Step 1 Check that the specified or automatically allocated DNS address of your PC is correct.
Step 2 Log in to the WS325 web management page, and choose Basic > WAN. Click the WAN tab
page, and change the default value 1500 or 1492 of MTU to 1400 or a smaller value.
----End
2.11 Why cannot I send an email with attachments?
Take WS325 for example, to resolve this problem:
Log in to the WS325 web management page, and choose Basic > WAN. Click the WAN tab
page, set MTU to Manual, enter 1400 or a smaller value in Size, and click Submit, as shown
in Figure 2-25.
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Figure 2-25 Changing the MTU size
If the problem persists, power off and on your WS325, and try again.
2.12 What is ARP spoofing? How can I identity an ARP
spoofing attack?
ARP spoofing is a technique whereby an attacker changes the mapping between the media
access control (MAC) address and IP address and causes an Internet access failure. In
communication, data is forwarded based on the mapping between the MAC address and IP
address. If the mapping is incorrect, errors will occur, and the communication will be affected.
Symptom:

On a LAN, all users or users in a certain area are disconnected frequently. A user can
connect to the Internet by restarting the PC or other network devices (for example,
gateways), or disabling the network adapter. However, the fault persists.

The Internet access rate is unstable. However, when I test the access rate on a PC, the rate
is normal.

E-bank, online game, or QQ accounts are lost frequently.
To identify an ARP spoofing attack, take WS325 for example:
Step 1 Log in to the WS325 web management page, and choose Status > Device Information.
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You can then see the MAC address of the WS325, as shown in Figure 2-26.
Figure 2-26 MAC address of the WS325
Step 2 Enter arp –a in the command line window.
If no ARP spoofing attack occurs, the displayed MAC address is consistent with that of the
WS325's LAN port, as shown in Figure 2-27.
Figure 2-27 Consistent MAC address
If an ARP spoofing attack occurs, the displayed MAC address is inconsistent with that of the
WS325's LAN port, as shown in Figure 2-28.
Figure 2-28 Inconsistent MAC address
----End
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2.13 My gateway cannot work properly because other
users on the LAN often watch web TV or download files
using BT. What can I do?
P2P software, such as BT cannot be shielded because P2P software uses an unfixed port or
server. To resolve this problem, enable the required ports only. For example, to browse web
pages, enable ports 53 and 80. To receive and send emails, enable ports 25, 53, and 110.
2.14 I connect only two PCs to my gateway. However, the
Internet access rate is low. What can I do?
Check whether bandwidth-consuming communication, such as downloading files or watching
web TV, is ongoing on a PC. If yes, other communications will be affected.
To resolve this problem:
Step 1 Disconnect one PC. On the other PC, disable all communication and check that the Internet
access rate recovers.
Step 2 Check that your PCs are not virus-infected or attacked.
Step 3 Check that no bandwidth limit is set on the WS325.
If a small bandwidth limit is set, the access rate is low. Clear all settings on your gateway, and
try again.
----End
2.15 A PC can access the Internet but another PC fail to do
so. What can I do?
If a PC can access the Internet, your gateway is working properly. On the PC that cannot
access the Internet, check that the specified IP settings, such as the fixed IP address, gateway
IP address, and DNS address are correct, or have your gateway automatically allocate an IP
address and a DNS address to the PC.
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
To view IP settings on a PC running Windows XP:
1.
Right-click My Network Places on the desktop, and select Properties, as shown in
Figure 2-29.
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Figure 2-29 Selecting Properties
2.
In the displayed window, right-click Local Area Connection, and select Status, as
shown in Figure 2-30.
Figure 2-30 Selecting Status
3.
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Click the Support tab page, then Details, as shown in Figure 2-31.
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Figure 2-31 Clicking Details
You can then see the IP settings, as shown in Figure 2-32.
Figure 2-32 IP settings
----End

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To change the IP settings on a PC running Windows XP:
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Right-click My Network Places on the desktop, and select Properties. In the displayed
window, right-click Local Area Connection, and select Status. In the displayed dialog
box, click the General tab page, then Property, as shown in Figure 2-33.
Figure 2-33 Clicking Property
2.
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In the displayed dialog box, double-click Internet Protocol (TCP/IP), as shown in
Figure 2-34.
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Figure 2-34 Double-clicking Internet Protocol (TCP/IP)
3.
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Click the General tab page, then Obtain an IP address automatically, and click OK,
as shown in Figure 2-35.
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Figure 2-35 Obtaining an IP address automatically
The gateway will automatically allocate an IP address to your PC, as shown in Figure
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Figure 2-36 IP address automatically allocated
----End

Step 1
To view IP settings on a PC running Windows 7:
Right-click Network on the desktop, and select Properties, as shown in Figure 2-37.
Figure 2-37 Selecting Properties
Step 2
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In the displayed window, click Change adapter settings, as shown in Figure 2-38.
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Figure 2-38 Clicking Change adapter settings
Step 3
Right-click Local Area Connection, and select Status, as shown in Figure 2-39.
Figure 2-39 Selecting Status
Step 4
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Click the General tab page, then Details, as shown in Figure 2-40.
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Figure 2-40 Clicking Details
You can then see the IP settings, as shown in Figure 2-41.
Figure 2-41 IP settings
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----End

To change IP settings on a PC running Windows 7:
Step 1 Right-click Local Area Connection, and select Properties, as shown in Figure 2-42.
Figure 2-42 Selecting Properties
Step 2 Click the Networking tab page, and double-click Internet Protocol Version 4
(TCP/IPv4), as shown in Figure 2-43.
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Figure 2-43 Double-clicking Internet Protocol Version 4 (TCP/IPv4)
Step 3 Click the General tab page, then Obtain an IP address automatically, as shown in
Figure 2-44.
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Figure 2-44 Obtaining an IP address automatically
----End
Procedures for viewing and changing the IP settings on a PC running Windows Vista are
basically the same as those on a PC running Windows 7.
2.16 One of my computers connected to the device cannot
display web pages. What can I do?
Take WS325 for example: Other PCs can display web pages. This indicates that the WS325 is
working properly. This PC cannot display web pages because:

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The fixed IP address, default gateway IP address, or DNS address is incorrect or not set,
as shown in Figure 2-45.
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Figure 2-45 Incorrect IP address, default gateway IP address, or DNS address

The MAC address or IP address is filtered by the WS325, as shown in Figure 2-46 and
Figure 2-47.
Figure 2-46 Filtering the MAC address
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Figure 2-47 Filtering the IP address

This PC is virus-infected.

Hardware, such as the network adapter or network cable is faulty.
2.17 After I connect my PC to the device, the MSN fails to
set up a video call, but other applications are normal.
What can I do?
Take WS325 for example, to resolve this problem, enable the Universal Plug and Play (UPnP)
function on the WS325. Log in to the WS325 web management page, and choose
Advanced > UpnP. Click the UPnP tab page, and select Enable, as shown in Figure 2-48.
Figure 2-48 Enabling the UPnP function
2.18 The Internet access rate becomes low after I connect
my PC to the device. What can I do?
Take WS325 for example, to resolve this problem:
Step 1 Check that the broadband bandwidth is sufficient.
If the bandwidth is 1 Mbit/s, the Internet access rate is low when two or more users access the
Internet at the same time and one of them watches online videos or downloads files using
Xunlei, BPS, FlashGet, eMule, or QQDownload.
Step 2 Check that no bandwidth limit is set on the WS325.
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If a small bandwidth limit is set, the access rate is low. Clear all settings on the WS325, and
try again.
Step 3 Check that no PC on the LAN is infected by viruses (for example, worms).
If a PC is virus-infected, install antivirus software on the PC and update it to the latest version.
Scan the entire system and kill the viruses. To improve system security and reliability, update
and install patches periodically, uninstall unnecessary services, and disable unnecessary ports.
Step 4 Check that the network cable is correctly connected.
Connect only one PC to your modem, and check whether the Internet access rate is normal. If
no, the network cable may be faulty.
Step 5 Check that your PC's system drive has sufficient available space (for example, check that the
CPU usage is low).
The available space is insufficient probably because that you have loaded too many
applications. To improve the Internet access rate, load only necessary software or delete
unnecessary files. An application with high CPU usage affects the Internet access rate and PC
running speed.
Step 6 Check that the network is normal.
Check that the server of the destination website has sufficient bandwidth or does not overload.
Wait for a while, and try again.
Step 7 Check that your PC does not run for a long time.
If your PC has been running for a long time, restart it, and try again.
Step 8 Check that you have installed only one firewall.
If you have installed more than one firewall, uninstall unnecessary firewalls.
----End
2.19 Why can I use QQ but cannot display any web page?
The normal use of QQ indicates that your gateway is working properly. Web pages cannot be
displayed probably because:

The DNS address is incorrect.
For example, the DNS address is set to 192.168.3.1 (default IP address of a gateway). As
a result, the DNS cannot resolve certain websites' domain names, and you cannot visit
these websites. To resolve this problem, specify a correct DNS address provided by your
ISP as follows:
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Step 1
Right-click My Network Places on the desktop, and select Properties.
Step 2
In the displayed window, right-click Local Area Connection, and select Properties.
Step 3
Click the General tab page, and double-click Internet Protocol (TCP/IP).
Step 4
In the displayed dialog box, change the DNS address, as shown in Figure 2-49.
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Figure 2-49 Changing the DNS address
----End

The MTU value is incorrect.
The default MTU value of a Huawei gateway is 1500 when Connection type is set to
static IP or DHCP and 1492 when set to PPPoE, as shown in Figure 2-50.
To resolve this problem, change the MTU to a smaller value, for example, 1430 or 1400,
as shown in Figure 2-51.
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Figure 2-50 Default MTU value when Connection type is set to PPPoE
Figure 2-51 Changing the MTU to a smaller value
2.20 When I connect my PC to the devide, a message is
displayed, indicating that my PC is obtaining an IP
address and no connection is set up on the WAN port.
What can I do?
Take WS325 for example: if any of the following situations occurs, this message is displayed.

Your PC cannot access the Internet without a gateway.

The network cable is not correctly connected or any of the WS325 indicators is abnormal
(the SYS indicator is blinking and the WAN and LAN indicator are steady on).

The broadband user name or password on the WS325 or a specified IP address is
incorrect.

Your PC's MAC address is improperly cloned.
To resolve this problem:

Step 1
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If your PC accesses the Internet using broadband PPPoE dialup:
Check that your PC can access the Internet without a gateway.
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Connect your PC to the modem using a network cable. Clear and re-enter the broadband
user name and password saved on your PC, as shown in Figure 2-52. If "Error 678" or
"Error 691" is displayed, contact your local ISP.
Figure 2-52 Clearing and re-entering the broadband user name and password
Step 2 Connect your PC to a LAN port of the WS325, and ADSL modem to the WAN port of the
WS325.
Step 3 Log in to the WS325 web management page, and choose Basic > WAN. Click the WAN tab
page, set Connection type to PPPoE, specify Username and Password, select Enable in
MAC Address Clone, and click Clone My PC's MAC, as shown in Figure 2-53.
Figure 2-53 Cloning your PC's MAC address
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----End

If your compute accesses the Internet using DHCP:
1.
Check that your PC can access the Internet without a gateway.
2.
Connect your PC to a LAN port of the WS325, and ADSL modem to the WAN port of
the WS325.
3.
Log in to the WS325 web management page, and choose Basic > WAN. Click the WAN
tab page, set Connection type to DHCP, and click Submit, as shown in Figure 2-54.
Figure 2-54 Setting Connection type to DHCP
Step 4 Choose Basic > LAN. On the displayed tab page, specify Start IP address and End IP
address, as shown in Figure 2-55.
Do not set the start IP address to 192.168.3.1.
Figure 2-55 Specifying Start IP address and End IP address
----End
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2.21 Why cannot I hear voices when using QQ to set up
video calls?
Take WS325 for example, to resolve this problem, enable the WS325's UPnP function.

To enable the UPnP function on the WS325 web management page:
Log in to the WS325 web management page, and choose Advanced > UPnP. Click the
UPnP tab page, and select Enable, as shown in Figure 2-56.
Figure 2-56 Enabling the UPnP function

To enable the UPnP function in the OS (for example, Windows XP):
Install an OS on your PC, such as Windows Me or Windows XP, and install the UPnP.
To install the UPnP on your PC:
Step 1 Choose Start > Control Panel on the desktop.
Step 2 Click Add or delete programs, then Add or delete Windows components.
Step 3 Select Networking Services, and click Details, as shown in Figure 2-57.
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Figure 2-57 Selecting Networking Services and clicking Details
Step 4 Select UPnP User Interface, and click OK, as shown in Figure 2-58.
Step 5 Click Next.
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Figure 2-58 Selecting UPnP User Interface
----End
2.22 Why cannot I play Happy Farm and QQ Ranch on my
PC connected to the device?
Take WS325 for example, to resolve this problem, change the MTU value as follows:
Log in to the WS325 web management page, and choose Advanced > WAN. Click the WAN
tab page, change the default MTU value to a value ranging from 1400 to 1450.
Figure 2-59 shows the default MTU value.
Figure 2-59 Default MTU value
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Figure 2-60 shows the new MTU value.
Figure 2-60 New MTU value
2.23 How often does the DHCP server clear the customer
information list?
Take WS325 for example:
The interval at which the DHCP server automatically clears the customer information list
equals to the DHCP's expiration duration (that is, the lease duration of the DHCP server). For
example, if the lease duration is 1 day (default duration on the gateway), the DHCP server
clears the customer information list once every day even if your PC is powered off or another
IP address is specified.
To view the lease duration of the DHCP server:
Log in to the WS325 web management page, and choose Basic > LAN. Click the DHCP
Server tab page. You can then see that the lease duration is 1 day (default), as shown in
Figure 2-61.
Figure 2-61 Viewing the lease duration of the DHCP server
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3 Wireless Connection
3.1 A dialog box is displayed when I connect my PC to a
WLAN, indicating that the Windows was unable to
connect to selected. What can I do?
Figure 3-1 shows the dialog box displayed when you connect your PC to a WLAN.
Figure 3-1 Wireless connection failure 1
The connection failure is resulted from faulty negotiation between your wireless network
adapter and gateway, which may be caused by:

WEP authentication mode of your gateway is set to SHARE, as shown in Figure 3-2.
Figure 3-2 WEP authentication mode set to SHARE
To resolve this problem:
Step 1
Set WEP authentication mode to OPEN or BOTH.
Step 2
In the HUAWEI-XHAQKB Wireless Network Properties dialog box, click the
Security tab page, and set Security type to Shared, as shown in Figure 3-3.
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Figure 3-3 Changing Security type
----End

The security mode on your gateway is set to Wi-Fi protected access-pre-shared key
(WPA-PSK) or WPA2-PSK. However, your PC runs Windows XP SP2, and the patch is
installed incompletely. As a result, the OS does not support WPAl, and the wireless
connection fails. You can view the security modes that your computer OS supports by
copying the configuration file to your PC.
To resolve this problem:
Step 1
Set Security to WEP, and WEP authentication mode to OPEN or Automatic.
Step 2
Visit the official website of Microsoft, download the Windows XP patch (KB893357),
and install it on your PC.
Your PC then can support WPA-PSK or WPA2-PSK and connect to the WLAN.
----End
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3.2 A dialog box is displayed when I connect my PC to a
WLAN, indicating that my PC is connected to XX (an SSID)
but does not have rights to access the Internet. What can I
do?
Your PC may display this dialog box if the connection process takes a long time. This does
not necessarily indicate that the wireless connection fails. In this case, ping the gateway. The
connection between your PC and gateway should be normal, and your PC can be able to
connect to the WLAN.
3.3 When I install the drive for my wireless network
adapter, a message is displayed, indicating that the
adapter name is already in use as a service name or a
service display name. What can I do?
To resolve this problem:
Step 1 Open the drive files, and find the netwns32.inf file, as shown in Figure 3-4.
Figure 3-4 netathuw.inf file
Step 2 Open the netwns32.inf file, and press Ctrl+F. In the displayed Find dialog box, search for
the keyword DispName.
Figure 3-5 shows the desired statement.
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Figure 3-5 Desired statement
Step 3 Change the statement. For example, append 1 to DispName, as shown in Figure 3-6.
Figure 3-6 Appending 1 to DispName
Step 4 Save the netwns32.inf file, and reinstall the drive.
----End
3.4 Why can my wireless network adapter detect the
wireless signal but cannot connect to my WLAN?
Take WS325 for example, to resolve this problem:
Step 1 Check that your wireless network adapter connects to your own WLAN.
Log in to the gateway management page using a wired connection, and choose Status >
WLAN. Click the WLAN tab page, check the SSID, as shown in Figure 3-7. If the SSID is
inconsistent with the name of your WLAN, enter the correct SSID.
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Figure 3-7 Correct SSID
Step 2 Check that the detected signal is strong.
The connection may fail if the signal is weak. In this case, place your PC near the signal
source and try again.
Step 3 Check that the MAC address filtering function is disabled on the WS325.
Log in to the WS325 web management page using a wired connection, and choose Basic >
WLAN. Click the WLAN Filtering tab page, check that the Enable check box is cleared, as
shown in Figure 3-8.
Figure 3-8 Clearing the Enable check box
Step 4 Check that the security protocol and key are correct.
Log in to the WS325 web management page using a wired connection. On the Wireless
Settings page shown in Figure 3-9, view the security protocol and record the key.
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Figure 3-9 Viewing the security protocol
Step 5 Delete the configuration file.
To delete the configuration file from your PC, right-click My Network Places on the desktop
and select Properties. In the displayed window, right-click Wireless Network Connection,
and select Properties. In the displayed dialog box, click the Wireless Networks tab page, and
clear the Preferred Network field box, as shown in Figure 3-10.
Figure 3-10 Clearing the Preferred Network field box
Step 6 Enter the correct key to re-search for the wireless signal and reconnect your PC wirelessly.
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----End
3.5 What can I do if I forgot my WLAN's key?
Take WS325 for example, to resolve this problem:
Step 1 Restore the WS325 to its default settings as follows:

Use a sharp object (for example, a paperclip) to push and hold the Reset button for about
6 seconds.

Log in to the WS325 web management page, choose Maintenance > Device. Click the
Reset tab page, then Restore Default Settings, as shown in Figure 3-11.
Figure 3-11 Restoring the WS325 to its default settings
Step 2 Connect your PC to the WS325 using a network cable, log in to the WS325 web management
page, and choose Basic > WLAN. On the displayed page, change the key.
3.6 How can I prevent other users from embezzling my
WLAN?
Take WS325 for example, to protect your WLAN from unauthorized access:
Step 1 Click the Wireless Settings tab page, and set Security to WPA-PSK or WPA2-PSK, and
WPA encryption to AES, as shown in Figure 3-12.
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Figure 3-12 Setting Security and WPA encryption
Step 2 Click the WLAN Filtering tab page, select Enable, and set other rules to disable
unauthorized connections, as shown in Figure 3-13.
Figure 3-13 Setting rules to disable unauthorized connections
Step 3 Click the Wireless Settings tab page, and select Enable in Hide broadcast, as shown in
Figure 3-14.
Other wireless network adapters cannot identify the name of your WLAN and cannot connect
to your WLAN.
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Figure 3-14 Enabling Hide broadcast
----End
3.7 How can I enable and view the WLAN settings on my
PC running Windows XP?
Enable the wireless service function on your PC before you use the built-in management
software to configure and manage your wireless network adapter.
To enable the wireless service function:
Step 1 Right-click My PC on the desktop, and select Manage.
Step 2 In the displayed window, choose Services and Applications > Services. On the right pane,
right click Wireless Zero Configuration, and select Enable, as shown in Figure 3-15.
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Figure 3-15 Enabling Wireless Zero Configuration
The Service Control dialog box is displayed, as shown in Figure 3-16.
Figure 3-16 Service Control dialog box
----End
To view the WLAN settings:
Step 1 Right-click My Network Places on the desktop, and select Properties, as shown in Figure
3-17.
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Figure 3-17 Selecting Properties
Step 2 In the displayed window, right-click Wireless Network Connection, and select Properties,
as shown in Figure 3-18.
Figure 3-18 Selecting Properties
Step 3 Click the Wireless networks tab page, and select the network you want to connect to in
Preferred Networks, and click Properties, as shown in Figure 3-19.
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Figure 3-19 Selecting the network you want to connect to
Step 4 Click the Association tab page, and check that the WLAN settings, such as Network
Authentication, Data encryption, and Network Key are consistent with those on the WS325,
as shown in Figure 3-20.
If your WLAN is encrypted using WEP, check whether the value of Key index is consistent
with that on the WS325.
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Figure 3-20 Checking the WLAN settings
----End
3.8 A message is displayed when I connect my PC to a
WLAN, indicating that the Windows cannot find a
certificate for connecting to the network. What can I do?
To resolve this problem:

If the security mode on your gateway is set to WEP:
Step 1 Right-click My Network Places on the desktop, and select Properties, as shown in Figure
3-21.
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Figure 3-21 Selecting Properties
Step 2 In the displayed window, right-click Wireless Network Connection, and select Properties,
as shown in Figure 3-22.
Figure 3-22 Selecting Properties
Step 3 Click the Wireless Networks tab page, and select the network you want to connect to in
Preferred, and click Properties, as shown in Figure 3-23.
Figure 3-23 Selecting the network you want to connect to
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Step 4 Click the Authentication tab page, and clear Enable IEEE 802.1x authentication for this
network, as shown in Figure 3-24.
Figure 3-24 Clearing Enable IEEE 802.1x authentication for this network.

If the security mode on your gateway is set to WPA-PSK/WPA2-PSK:
This message is displayed probably because your computer OS does not support
WPA-PSK/WPA2-PSK.
In this case, click the Association tab page in the Wireless network properties dialog box to
check whether the Network Authentication value contains WPA-PSK/WPA2-PSK, as
shown in Figure 3-25. If no, your computer OS does not this security mode.
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Figure 3-25 Security modes supported by your computer OS
In this case, change the encryption mode from WPA-PSK +WPA2-PSK to one supported by
your computer OS, or install a patch for your computer OS to support WPA-PSK
+WPA2-PSK.
3.9 When I enter the key of my WLAN, a dialog box is
displayed, indicating that the key must consist of 40 or 104
bits. What can I do?
To resolve this problem:


If the security mode on your gateway is WEP, the dialog box is displayed because the
key does not meet the following requirements:
−
64-bit key: 5 ASCII characters and 10 hexadecimal characters
−
128-bit key: 13 ASCII characters and 26 hexadecimal characters
−
152-bit key: 16 ASCII characters and 32 hexadecimal characters
If the security mode on your gateway is WPA-PSK/WPA2-PSK, the dialog box is
displayed probably because your computer OS does not this security mode.
In this case, click the Association tab page in the Wireless network properties dialog
box to check whether the Network Authentication value contains
WPA-PSK/WPA2-PSK, as shown in Figure 3-26. If no, your computer OS does not this
security mode.
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Figure 3-26 Security modes supported by your computer OS
In this case, change the encryption mode from WPA-PSK +WPA2-PSK to one supported by
your computer OS, or install a patch for your computer OS to support WPA-PSK
+WPA2-PSK.
3.10 A dialog box is displayed when I connect my PC to a
WLAN, indicating that the current WLAN settings do not
support connection to an AP network. What can I do?
To resolve this problem:
Step 1 Right-click My Network Places on the desktop, and select Properties, as shown in Figure
3-27.
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Figure 3-27 Selecting Properties
Step 2 In the displayed window, right-click Wireless network connection, and select Properties, as
shown in Figure 3-28.
Figure 3-28 Selecting Properties
Step 3 Click the Wireless networks tab page, then Advanced. In the Advanced dialog box, click
Any available network (access point preferred), as shown in Figure 3-29.
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Figure 3-29 Clicking Any available network (access point preferred)
Step 4 Click OK, and try again.
----End
3.11 When I connect my PC running Windows Vista to a
WLAN, a message is displayed, indicating that the WLAN
settings saved on the PC do not meet network
requirements. What can I do?
To resolve this problem:
Step 1 Right-click the icon of your WLAN, and select Properties.
Step 2 Click the Security tab page, and change Security type, Encryption type, and Network
security key to values consistent with those on your gateway, as shown in Figure 3-30.
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Figure 3-30 Changing security settings
----End
3.12 Why can my laptop detect the SSIDs of other WLANs
but cannot detect the SSID of my WLAN?
Take WS325 for example, to resolve this problem:
Step 1 Connect your laptop to the WS325 using a network cable, and log in to the WS325 web
management page to check that your WLAN is enabled, as shown in Figure 3-31.
If your WLAN is enabled, the WLAN indicator will blink.
Figure 3-31 Enabling the WLAN
Step 2 Change Channel to a value ranging from 1 to 11, as shown in Figure 3-32.
Certain wireless network adapters do not support channel 12 or channel 13.
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Figure 3-32 Changing the channel to a value ranging from 1 to 11
Step 3 Adjust the position of the WS325 or wireless network adapter. Do not put your wireless
network adapter in a signal coverage hole.
Step 4 Check that another wireless network adapter can detect the wireless signal of the gateway,
thereby checking that the WS325 is working properly.
Step 5 Restore the WS325 to its default settings, and try again.
Step 6 If the problem persists, contact your local ISP.
----End
3.13 My PC has connected to the WLAN but is
occasionally disconnected. What can I do?
Take WS325 for example, to resolve this problem:
Step 1 Check that no interference sources, such as microwave ovens or cordless phones are near your
WLAN.
Step 2 Change the SSID of your WLAN, as shown in Figure 3-33.
Another user may be using the SSID of your WLAN in the wireless coverage range.
Figure 3-33 Changing the SSID
Step 3 Change Channel to 1 or 11.
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Multiple WLANs may be using the same channel, for example, channel 6, which may cause
channel congestion.
Step 4 Check that the signal is strong.
If the signal is weak, move your PC to a place near the wireless signal source.
Step 5 Connect only one PC to the WS325, and try again. If the problem persists, scan the entire
system and kill the viruses.
Step 6 Update the drive of your wireless adapter to the latest version and check that the PC hardware
is normal.
----End
3.14 What are the factors that affect the wireless signal
transmission? How can I improve the signal transmission
quality in the existing network environment?
Factors that can affect the wireless signal transmission are:

The walls in a crowed home are the major obstacles that affect the wireless signal
transmission. A WLAN uses the microwave frequency band, which propagates
rectilinearly and cannot diffract around obstacles. If you place a wireless receiver behind
an obstacle, the receiver receives weak signal or no signal.

A physical obstacle blocks the microwave signal and absorbs electromagnetic energy.
Therefore, a floor of reinforced concrete is the major metal obstacle that affects the
wireless signal transmission in a home. The signal cannot penetrate such a floor.

The IEEE 802.11b/g standard defines a 2.4 GHz frequency band for WLAN
communication. However, many devices, such as microwave ovens, Bluetooth devices,
cordless phones, and refrigerators also operate at this frequency. If you place a wireless
device near to such a device, they will generate a strong magnetic field, which severely
interferes with your WLAN.

Channel conflicts or signal crosstalk may occur when multiple wireless devices are
deployed on your WLAN.

Interference sources, such as radio towers, welding machines, trams or high-voltage
power transformers may strongly interfere with the wireless signal if you place the
wireless device or cable 100 meters around such an interference source.

The weather may affect outdoor wireless signal transmission. The signal attenuates
seriously on a thunder-stormy or cloudy day but propagate farther on a sunny day.
Measures that can improve the signal transmission quality:
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
Install your wireless AP in a higher position to reduce obstacles and signal coverage
holes, or in a position where the signals penetrate as few walls as possible. The AP is
best installed in a position where no obstacle exists between the AP and the wireless
clients

Change the current transmission channel to prevent crosstalk. Set the transmission
channel at least five channels away from those for other WLANs.

Keep your wireless AP far from household appliances to reduce interference and ensure
smooth signal transmission.

Change the antennas of the wireless AP to strengthen the wireless signal.
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3.15 How can I encrypt my WLAN? Which security modes
are supported by a Huawei gateway?
Take WS325 for example:
Encrypt your WLAN to prevent unauthorized use of your network resources. A Huawei
gateway supports five security modes: Open, WEP, WPA-PSK, WPA2-PSK, and
WPA-PSK/WPA2-PSK. If you are not familiar with security modes, encrypt your WLAN
using WPA2-PSK.
To encrypt your WLAN:
Step 1 Log in to the WS325 web management page, and choose Basic > WLAN.
Step 2 Click the WLAN tab page, set Security to Open, WEP, WPA-PSK, WPA2-PSK, or
WPA-PSK/WPA2-PSK, enter a password in WPA pre-shared key, and set WPA
encryption to AES and WPS mode to PBC (both are default values), as shown in Figure
3-34.
Step 3 Click Submit.
Figure 3-34 Encrypting your WLAN
----End
3.16 My wireless network adapter supporting IEEE 802.11n
provides a connection rate less than 100 Mbit/s after
connecting to the device. What can I do?
Possible causes and corresponding solutions are as follows, take WS325 for example:

The connection rate varies with security modes, and your WS325's WPA security mode
is improperly set.
Change WPA encryption to AES, as shown in Figure 3-35.
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Figure 3-35 Changing WPA encryption to AES

Interferences are strong.
−
Channel conflicts or signal crosstalk may occur when multiple wireless devices are
deployed on your WLAN.
Change your WLAN's signal transmission channel and SSID.
−
The wireless signal is blocked by physical obstacles and become weak.
Place your wireless AP to an optimal position.
−
The IEEE 802.11b/g standard defines a 2.4 GHz frequency band for WLAN
communication. However, many devices, such as microwave ovens, Bluetooth
devices, cordless phones, and refrigerators also operate at this frequency. If you place
a wireless device near to such a device, they will generate a strong magnetic field,
which severely interferes with your WLAN.
To reduce interference and ensure smooth signal transmission, keep your wireless AP
far away from household appliances.
−
The drive of your wireless network adapter is not updated.
Update it to the latest version.
3.17 How can I encrypt my WLAN? Which security modes
are supported by a Huawei gateway?
Take WS325 for example, to prevent unauthorized use of your network resources, encrypt
your WLAN and change the key every 3600 seconds. WS325 supports five security modes:
Open, WEP, WPA-PSK, WPA2-PSK, and WPA-PSK/WPA2-PSK. If you are not familiar with
security modes, encrypt your WLAN using WPA-PSK or WPA2-PSK.
To encrypt your WLAN:
Step 1 Log in to the WS325 web management page, as shown in Figure 3-36.
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Figure 3-36 WS325 web management page
Step 2 Choose Basic > WLAN.
Step 3 Click the WLAN tab page, set Security to Open, WEP, WPA-PSK, WPA2-PSK, or
WPA-PSK/WPA2-PSK, enter a password in WPA pre-shared key, and set WPA
encryption to AES and WPS mode to PBC (both are default values), as shown in Figure
3-37.
Step 4 Click Submit.
Figure 3-37 Encrypting your WLAN
----End
3.18 How can I configure my device as a switch?
Take WS325 for example, to configure your device as a switch:
Step 1 Connect your WS325 as follows:
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ADSL modem → WAN port of router A → LAN port of router A → WAN port of the WS325
→ LAN port of the WS325 → PC
Step 2 Change the IP address of the WS325's LAN port as follows:
1.
Log in to the WS325 web management page at 192.168.3.1.
2.
Choose Basic > LAN.
3.
Click the DHCP tab page, change the IP address of the LAN port (192.168.3.1 by
default), and click Submit, as shown in Figure 3-38Figure 3-38.
Figure 3-38 Changing the IP address of the WS325's LAN port
Step 3 Power off the DHCP server, and connect the network cable to the LAN port of the WS325
(the WAN port is idle).
Step 4 On the WAN Connection page, set Connection type to Bridge, as shown in Figure 3-39.
Figure 3-39 Setting Connection type to Bridge
----End
3.19 What is the MAC address clone function used for?
Take WS325 for example:
The MAC address clone function is to copy a PC's MAC address to a gateway's WAN port to
overwrite the original MAC address of the WAN port. The purpose is to spoof certain servers
and remove security measures of ISPs. For example, Topway, China TieTong, or a residential
broadband operator associates your dialup connection account or static IP address with the
MAC address of your PC when authorizing broadband access services. Only the associated
PC can establish a dialup connection to the Internet without a gateway. To allow multiple PCs
to access the Internet using the WS325, log in to the WS325 web management page from the
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associated PC, and clone the MAC address of the PC to the WAN port of the WS325. The
WAN port then can communicate with the servers of your ISP in the same way of the
associated PC.
To clone your PC's MAC address:
Step 1 Log in to the WS325 web management page at 192.168.3.1 from the associated PC.
Step 2 On the WS325 web management page, choose Basic > WAN.
Step 3 On the WAN connection page, select a connection type, enable MAC Address Clone, and
click Clone My PC's MAC, as shown in Figure 3-40.
Figure 3-40 Cloning the MAC address
The MAC address displayed in MAC Address becomes the same as that of the associated PC,
as shown in Figure 3-41.
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Figure 3-41 MAC address of the associated PC
Step 4 Click Submit.
----End
Clone the MAC address on the PC associated by your ISP.
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4 Advanced Settings
4.1 How can I control access rights to prevent kids from
accessing to certain websites or applications?
Take WS325 for example, the WS325 provides four filtering methods: MAC addresses
filtering, IP address filtering, application filtering, and URL filtering.

To control access rights by setting a MAC address filtering rule:
Log in to the WS325 web management page, and choose Advanced > Filter. Click the
MAC Filter tab page, and set related parameters, as shown in Figure 4-1.
Figure 4-1 Setting a MAC address filtering rule
Parameter description:
−
MAC Filter: filters the packets sent from the source MAC address to the destination
MAC address.
−
Time control: specifies a time range in which the MAC address filtering must be
complete.
−
Priority: specifies the sequence according to which a rule is enabled in the case of
multiple rules.
−
Disable in Status: disables the rule.
−
Accept: allows the transmission of the packets that comply with the rule.
−
Reject: prohibits the transmission of the packets that do not comply with the rule.
To control the access rights in a specific period, enable the time control function.
In the Local Area Connection Status window, click the Support tab page, then Details.
You can then see your PC's MAC address, as shown in Figure 4-2.
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Figure 4-2 Viewing the PC's MAC address

To control access rights by setting an IP address filtering rule:
Log in to the WS325 web management page, and choose Advanced > Filter. Click the
IP Filter tab page, and set related parameters, as shown in Figure 4-3.
Figure 4-3 Setting an IP address filtering rule
Parameter description:
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IP: filters the packets sent from the ports at the source IP address segment to those at
the destination IP address segment.
−
Protocol: specifies one or more protocols, such as the Transmission Control Protocol
(TCP), User Datagram Protocol (UDP), and Internet Control Message Protocol
(ICMP).
−
Source start address and Source end address: specify a source IP address segment.
−
Source start port and Source end port: specify a source port range.
−
Destination start address and Destination end address: specify a destination IP
address segment.
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−
Destination start port and Destination end port: specify a destination port range.
−
Disable in Status: disables the rule.
−
Accept: allows the transmission of the packets that comply with the rule.
−
Reject: prohibits the transmission of the packets that do not comply with the rule.
As shown in Figure 4-3, the WS325 filters the IP addresses at a specified destination
segment.

To control access rights by setting an application filtering rule:
Log in to the WS325 web management page, and choose Advanced > Filter. Click the
Application Filter tab page, and set related parameters, as shown in Figure 4-4.
Figure 4-4 Setting an application filtering rule
This rule filters applications, such as HTTP and SSH that pass through the WS325.
Parameter description:

−
Disable in Status: disables the rule.
−
Accept: allows the transmission of the packets that comply with the rule.
−
Reject: prohibits the transmission of the packets that do not comply with the rule.
To control access rights by setting a URL filtering rule:
A uniform resource locator (URL) is a specific character string that constitutes a
reference to an Internet resource. The URL filtering can filter the websites that contain a
specific character string to allow or prohibit the access to them.
To allow or prohibit the access to specific websites, set a URL filtering rule, as shown in
Figure 4-5.
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Figure 4-5 Setting a URL filtering rule
Parameter description:
−
URL: specifies the reference of the website to be filtered.
−
Priority: specifies the sequence according to which a website is filtered.
−
Disable in Status: disables the rule.
−
Accept: allows the transmission of the packets that comply with the rule.
−
Reject: prohibits the transmission of the packets that do not comply with the rule.
4.2 What is a DMZ host? What is a DMZ host used for?
A DMZ host is a host on the internal network that has all ports exposed, except those ports
otherwise forwarded. The purpose of a DMZ is to add an additional security layer to an
organization's LAN, thereby resolving the problem that internal servers cannot be accessed
from an external network after a firewall is installed.
You can configure a DMZ host when:

You cannot access the mapped port remotely.

You do not know the port number for communicating with certain application servers or
special software (for example, IP cameras and database software) and cannot perform
port mapping.

You cannot perform certain operations on online games. For example, you can start a
game but cannot set up a game team.

You cannot open certain web pages or perform certain operations on an opened web page.
For example, you cannot transfer the account balance or enter a verification code on an
E-bank.
Take WS325 for example, to configure a DMZ host for a WAN connection, specify Host
address (the IP address of the PC to be configured as a DMZ host), enable DMZ, and click
Submit, as shown in Figure 4-6.
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Figure 4-6 Setting a DMZ host
The information about the new rule is then displayed on the top of the setting page, as shown
in Figure 4-7.
Figure 4-7 Information about the new rule
4.3 How can I configure a DDNS?
Take WS325 for example; apply for a DNS domain from your ISP before you enable the
services on a dynamic domain name server (DDNS). To configure a DDNS, set parameters,
such as Host and Domain, as shown in Figure 4-8.
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Figure 4-8 Setting a DDNS
4.4 What is port mapping (virtual server configuration)?
How can I set a port mapping rule?
Generally, a broadband gateway integrates a firewall, which blocks the access of PCs on a
WAN to certain servers on a LAN. The WAN port of a gateway can be mapped to the server
on a LAN so that the server can be accessed by PCs on a WAN.
To set a port mapping rule, take WS325 for example:
Select a mode from the Application drop-down list box, set parameters, such as Protocol,
External start port, External end port, Mapping name, and Internal port (for example,
192.168.3.2), and click Submit, as shown in Figure 4-9.
Figure 4-9 Setting a port mapping rule
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4.5 How can I set a bandwidth control rule (manage
traffic)?
Bandwidth control allows you to set a limit or rule to properly allocate and control bandwidth
in the case of limited bandwidth resources.
You can set a bandwidth control rule when:

Multiple PCs access the Internet using the same bandwidth.

A PC's download and upload rates must be specified.
To set bandwidth control, take WS325 for example:
Step 1 Log in to the WS325 web management page, and choose Advanced > IP QoS.
Step 2 Specify the total download and upload bandwidth you want to apply for, select a traffic
management type, and click Apply, as shown in Figure 4-10.
Step 3 Click the Bandwidth Classifications tab page, then New to add a new rule, and click
Submit.
Figure 4-10 Setting a bandwidth control rule
----End
4.6 How can I enable the UPnP function?
Take WS325 for example, to enable or disable the UPnP function, select or clear Enable, as
shown in Figure 4-11. When the UPnP function is enabled, PCs on a LAN can automatically
identify the UPnP devices connected to the device.
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Figure 4-11 Enabling the UPnP function
4.7 An internal server cannot be accessed from an external
network after a virtual server is set. What can I do?
Take WS325 for example, to resolve this problem:
Step 1 Check that the required ports are properly mapped to the internal server. That is, check that
the IP address set for the forwarding rule is the IP address of the internal server.
Step 2 Access the internal server from another internal PC to check that the server is powered on and
can be accessed.
Step 3 Check that all required ports are mapped to the internal server.
The access may fail because certain ports are not mapped.
You can enable the DMZ host to check whether the internal server can be accessed. If yes,
certain ports are not mapped. If you do not know the port for communicating with IP cameras
or special applications, check whether the DMZ host can work properly. If yes, contact your
software supplier.
Step 4 Check whether the firewall installed on the WS325 filters the communication ports of your
server. If yes, disable the firewall temporarily.
Step 5 Disable the firewall installed on the internal server.
The firewall may block the PCs from a non-trusted area from accessing the internal server.
Step 6 Check whether the internal server is the web server providing port 80. If yes, change your
gateway's remote management port to another port to prevent conflicts.
Step 7 Access the virtual server from an external network to check that the virtual server is
successfully mapped. Do not access the virtual server from the internal network using the IP
address of the WAN port. Although you can access the virtual server from the internal
network, you cannot do so from an external network.
Step 8 Connect a PC to the WAN port of your gateway to check that your ISP has not shielded
related ports.
If the PC can access the internal server but cannot access the Internet, the internal server may
shield related ports, and the virtual server cannot be accessed. (As required by the Ministry of
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Industry and Information Technology of the People's Republic of China, ISPs must shield port
80 on personal broadband lines from November of 2009.)
----End
4.8 Does a Huawei Gateway support the UPnP? What is
UPnP?
The UPnP is an architecture that allows device-to-device networking of personal PCs,
intelligent equipment (or instruments), and household appliances. It is based on established
standards, such as the Internet Protocol Suite (TCP/IP), HTTP, and XML. An UPnP
compatible device can dynamically connect to a network and cooperate with other devices. In
this way, more people can access networks especially a home network. All Huawei gateways
support the UPnP.
4.9 How can I enable the UPnP in the OS after enabling
the UPnP on the gateway?
To use the UPnP, install an OS on your PC, such as Windows Me or Windows XP.
To install the UPnP on your PC running Windows XP:
Step 1 Choose Start > Control Panel on the desktop.
Step 2 Click Add or delete programs, then Add or delete Windows components.
Step 3 Select Networking Services, and click Details.
Step 4 Select UPnP User Interface, and click OK.
Step 5 Click Next.
----End
In this process, you may need to insert the CD-ROM of the Windows XP. If your PC runs
Windows 98 or Windows 2000, download the DirectX 9.0 from the official website of
Microsoft and install it.
4.10 The domain name filtering rule I set does not take
effect. What can I do?
Your PC saves domain names and IP addresses of the websites that you have visited. After
you set a domain name filtering rule, these domain names and IP addresses of the websites
can stilled be accessed.
To resolve this problem, delete all Internet Explorer cookies, and restart your PC as follows:
Step 1 Launch the Internet Explorer, and choose Tools > Internet Options.
Step 2 In the displayed dialog box, click Delete, as shown in Figure 4-12.
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Figure 4-12 Clicking Delete
Step 3 Select Cookies and History, and click Delete as shown in Figure 4-13.
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Figure 4-13 Deleting cookies and history records
Step 4 Restart your PC.
----End
4.11 An internal server cannot be accessed from an
external network after port mapping. What can I do?
Take WS325 for example, to resolve this problem:
Step 1 Check that the required ports are properly mapped to the server on the LAN. That is, check
that the IP address set for the forwarding rule is the IP address of the internal server.
Step 2 Access the internal server from another internal PC to check that the server is powered on and
can be accessed.
Step 3 Check that all required ports are mapped to the internal server.
The access may fail because certain ports are not mapped.
You can enable the DMZ host to check whether the internal server can be accessed, as shown
in Figure 4-14. If yes, certain ports may not be mapped.
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Figure 4-14 Enabling the DMZ
Step 4 Check that the internal server's communication ports are not filtered by the firewall installed
on your gateway.
Step 5 Disable the firewall installed on the internal server.
The firewall may block the PCs from a non-trusted area from accessing the internal server.
Step 6 Check that the internal server is not a special application server, for example, an FTP server
or VoIP server.
Only application layer gateways (ALGs) can support a special server. Currently, a Huawei
gateway supports only the H.323 VoIP standard, and do not support the SIP or MGCP. Two
connections must be set when the FTP is used to transmit data: control connection and data
connection. If the default port 21 for control connection is changed, the gateway cannot
identify the FTP service, and data connection fails.
Step 7 Connect a PC to the WAN port of your gateway to check that your ISP has not shielded
related ports.
If the PC can access the internal server but cannot access the Internet, the internal server may
shield related ports, and the virtual server cannot be accessed.
Do not change port 80 of a web server on the WS325 web management page.
Access the virtual server from an external network to check that the virtual server is successfully
mapped. Do not access the virtual server from the LAN using the IP address of the WAN port. Although
you can access the virtual server from the internal network, you cannot do so from an external network.
If you do not know the port for communicating with special servers, such as IP cameras or special
applications, check that the DMZ host is working properly. If the problem persists, contact your software
supplier.
----End
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4.12 Why cannot I establish a dialup connection after I
power off and on my gateway?
The possible cause is that the front-end server does not identify your disconnection and your
PC remains in the online state. To resolve this problem, wait a few minutes (generally about 3
to 5 minutes), and try again.
4.13 How can I set a wireless distribution system?
A wireless distribution system (WDS) enables two gateways to interconnect wirelessly to
increase the coverage range of a WLAN.
Take WS325 for example, to set a WDS:
Step 1 Log in to the WS325 web management page, and choose Basic > WLAN.
Step 2 Click the WLAN WDS tab page, select the SSID for which the WDS is to be enabled, enter
the MAC address of the interconnected gateway, and click Submit, as shown in Figure 4-15.
Figure 4-15 Setting a WDS
The WDS technology is immature, and the gateway specifications vary with vendors. Therefore, Two
gateways, especially two from different vendors, are difficult to interconnect. To resolve this problem,
use gateways from the same vendor.
Note the following items when you use a WDS:

The two gateways to be interconnected support and have enabled the WDS.

Settings of the following items must be the same on the two gateways to be
interconnected:

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Wireless channel
−
Security mode
−
Key
The security modes can be different.
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
The SSIDs can be different. However, you are advised to set two WLANs with the same
SSID. In this way, wireless clients can use the same SSID to connect to the expanded
WLAN.

The IP addresses you set for the two gateways' LAN ports must be different but in the
same network segment when you expand a WLAN in repeater mode.
----End
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