Download Ch10b

Network Security
Announcements
• Review Assignment - Assessment 3 (due Tuesday, before
class)
• Assessment 3 – Next Thursday
Reminders:
• Network Design Project
• No more than 2 per group
• Proposals due on the day of presentation
• Sign-ups shortly
2
Basics of Network Security
• Anti-virus / Anti-Spyware
• Access Controls
• Firewall
• Intrusion Protection/Detection Systems
• Identify fast spreading threats
3
Access Controls
• The four processes of access control
Firewalls
Example: Packet Filtering Firewalls
Intrusion Detection and
Prevention Systems (IDPS)
Intrusion Detection and Prevention Systems (cont’d.)
Basic Network Facts
 Primary Core Located in Technology Support Center (TSC)
 Secondary Core located in CIS Disaster Recovery Facility
 Comprised of Cisco Systems 6500 series switches
 Distribution layer, Cisco Catalyst 4500 and 3750 series
 Total network is 311 switches
 1600+ Controller based wireless Access Points
 All devices monitored 24/7 by Netcom staff.
 Dual connections to the internet via NCREN.
 Primary pipe is 10gig and backup is 1gig via NCREN BTOP
Network Security
Cisco Firewall Service Module
 UNCW uses Cisco Systems ASA5585 devices
 Primary and Secondary for Redundancy
 ASA provides up to 20 individual contexts
 Allows any VLAN on the switch to be passed through to the device to
operate as a firewall port and integrates firewall security inside the
network infrastructure.
 ASA evolved from Cisco PIX technology and uses the same timetested Cisco PIX Operating System, a secure, real-time operating
system.
 Defines the security parameter and enables the enforcement of
security policies through authentication, access control lists, and
protocol inspection.
Network Security
Intrusion Prevention Systems
 UNCW’s Intrusion Prevention Systems – ASA5585 IPS
 We currently use redundant pairs for continuity.
 The ASA network intrusion prevention and detection system
(IDS/IPS) reputational based, combining the benefits of signature,
protocol and anomaly-based inspection.
 Capable of performing real-time traffic analysis and packet logging on
IP networks.
 Can be used to detect a variety of attacks and probes, such as buffer
overflows, stealth port scans, CGI attacks, SMB probes, OS
fingerprinting attempts.
 Has a real-time alerting capability for Network Communications Staff
 Rules are pushed to all IPS systems nightly.
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Logical Network Core Traffic Flow
Total Network Layout
Network Authentication
 Cisco Identity Services Engine (ISE) is a security policy management and
control platform. It automates and simplifies access control and security
compliance for wired, wireless, and VPN connectivity. Cisco ISE is primarily
used to provide secure access and guest access, support BYOD initiatives.
 ISE authenticates against Active Directory, meaning credentials are required to
access UNCW’s network.
 ISE is deployed in all building and wireless networks as of fall 2014.
STUXNET
STUXNET – How it Worked
Stuxnet
What was it?
How did it spread and how far?
What are the implications?
Stuxnet
Precursors:
What should we do now?
Target – What Happened?
Target – How did it happen?
Target – How could it have been stopped?
Target – Modern Day Hacking
Security Discussion
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TJ Maxx
RSA
Epsilon
Gawker
Wikileaks
HB Gary
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11.1 Corporate Security: TJ Maxx
• War-Driving to seek vulnerabilities in wireless
networks
• Breaches took place all the way back to 2005
• Albert Gonzalez was mastermind
• 2005 -2007 sold as many as 170 million ATM/Credit Card #s
• Typically used SQL injection to launch packet sniffing
• Now serving 20 years in a federal prison
11.1 Corporate Security: RSA
• Security companies are often the target of many
hackers.
• Another case of phishing emails to get into the
company
• Excel Spreadsheet had a Zero-day exploit
• Exploit took advantage of Adobe Flash allowing them
to install a remote administration tool
• Used remote admin tool to get deeper information
11.1 Corporate Security: Epsilon
• Occurred earlier this year
• Primary purpose for stealing
• Phishing – maquerading as a trustworthy
entity to gain access to information
• Form of Social Engineering
• Carried out by email spoofing
11.1 Passwords: Gawker Hack
• After hack, the Wall Street Journal Examine a number of
passwords (188,279) and here are some of the most
commonly found:
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password
qwerty
letmein
trustno1
passw0rd
Can anyone guess the most commonly used?
11.1 Corporate Security: Higher Ed Threats
• Mobile Devices
• Social Media Viruses (hilarious video attack through FB)
• Virtualization
• Embedded devices (number of devices connected to the
network)
• Consumerization of IT (personal devices for
organizational use)
11.1 Corporate Security: Wikileaks
• Exposed major security flaws in the US
government
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Not standardized across agencies
No user restrictions on copying data
Minimal monitoring of users accessing sensitive data
• Recently, new measures are in place to alleviate
problems.
• Bradley Manning trial begins December 16th
11.1 Corporate Security: HB Gary
• Found a flaw in content management system
• Used an SQL Injection to gain access
• Numerous issues with the system allowed hackers to
obtain two passwords: the CEO (Aaron Barr) and COO
(Ted Vera)
• Key takeaway: passwords!
• Don’t use short, easily deciphered
• Use different passwords for different accounts