Download Remote Access Service

Working with Networking Services
Lesson 6
Objectives
DHCP
• DHCP is short for Dynamic Host Configuration Protocol.
• This protocol allows properly configured client
computers to obtain IP addresses automatically from a
DHCP server.
• The IP information obtained might include the
following:
– IP addresses
– Subnet masks
– Gateway addresses
– DNS server addresses
– Other advanced options
DORA
• DHCP sessions use a four-step process known as
DORA.
– Discovery: The client computer broadcasts out to the
network in order to find a DHCP server.
– Offering: The DHCP server sends out a unicast
“offering” of an IP address to the client computer.
– Request: The client broadcasts to all servers that it
has accepted the offer.
– Acknowledge: The DHCP server sends a final unicast
to the client that includes the IP information the client
will use.
• DHCP utilizes ports 67 and 68.
DHCP Server
• Installing a DHCP server consists of the
following actions:
– Installing the DHCP service
– Configuring an IP scope
– Activating the scope
– Authorizing the server
– Configuring advanced IP options (optional)
Adding DHCP Scopes
DHCP Confirmation Window
APIPA
• APIPA can get in the way of a client obtaining
an IP address properly (e.g., when a client
attempts to obtain an IP address from a
DHCP server, but the DHCP server is too
busy).
• Remember that APIPA is used by Windows
machines when it cannot connect with a
DHCP server to get a dynamic address.
Disable APIPA
Terminal Services
• Terminal Services, also known as Remote Desktop
Services, is a type of thin-client terminal server
computing.
• It allows client computers to access and use
applications loaded on the server, as well as to
connect to and take control of a server.
• Thin-client computers and PCs can connect to
servers running Terminal Services.
• The service uses port 3389 and is also known as
Microsoft WBT Server. WBT stands for WindowsBased Terminal.
Terminal Services Confirmations Screen
Remote Desktop Connection
Remote Access Service
• Remote Access Service (RAS) is grouping of
different hardware and software platforms to allow
remote access to another computer or network
device.
• Originally used with dial-up services, Microsoft RAS
has morphed into RRAS, or Routing and Remote
Access Service.
Remote Access Service
Routing and Remote Access
IPSec
• Internet Protocol Security (IPSec) is a
protocol within the TCP/IP suite that
encrypts and authenticates IP packets.
• It is designed to secure any application
traffic because it resides on the network
layer (or Internet layer, as TCP/IP
programmers refer to it).
• This protocol is used in conjunction with
virtual private networks and is an integral
part of IPv6.
IPSec
• There are three main protocols that IPSec uses to
perform its necessary functions:
– Security association (SA): This generates the
encryption and authentication keys that are used by
IPsec.
– Authentication header (AH): This provides
connectionless integrity and the authentication of
data. It also provides protection versus replay
attacks.
– Encapsulating security payload (ESP): This provides
the same services as AH but also provides
confidentiality when sending data.
DNS
• The Domain Name System (DNS) is a worldwide
service that resolves host names to IP addresses.
• This facilitates proper communication between
computers. DNS servers communicate with each
other in a hierarchy in an effort to teach each other
their name resolutions.
• DNS servers use inbound port 53 to accept name
resolution requests.
Adding the DNS Service
WINS
• Windows Internet Name Service (WINS) is a
service that resolves NetBIOS names to IP
addresses.
• It is Microsoft’s version of the NetBIOS
Name Service (NBNS) combined with a
name server.
Adding the WINS Server
Server 2008 Features List
Summary
• How to install and configure DHCP to hand out IP addresses to
client computers.
• The four-step DHCP process known as DORA.
• How to install and configure Terminal Services so that client
computers can connect remotely to a server and take control
of it in the GUI.
• How to install and configure Routing and Remote Access
Service (RRAS) as a LAN router.
• To define IPsec and the various types, including SA, AH, and
ESP.
• How DNS and WINS function and how to install them in
Windows Server 2008, as well as how to create forward
lookup zones.