Introduction to Firewalls (1 of 2)

Summary

• An explanation of firewalls, types of firewalls, stateless vs stateful filtering, placement of firewalls within a network, examples of firewall rules, and the importance of having an established security policy, as well as coverage of DMZs and proxy servers.

Video 

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• Firewalls 1/2
  
• 19:54 - Windows firewall settings
• 29:10 - Listing of firewall rules in iptables
• 30:58 - Viewing incoming packet information in iptables
• Firewalls 2/2
• 13:31 - Adding an input rule to iptables
• 14:55 - Flushing all firewall rules from iptables 

Reference Materials

• Guide to Network Defense and Countermeasures
• Chapter 9 - Choosing and designing firewalls.
• Chapter 10 - Firewall topology (DMZ and proxy servers) 

Additional Information

• Building a firewall, Part 1 (of 3)
• 25 common firewall rules

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