Linux Firewalls
What is a Firewall?
Types of Network Firewalls
Locking things down
Decide on a Default Packet Filtering Policy
Writing The Rules
Types of Chains
Ipchains Command
Rule Policy: Accept/Deny/Reject
Accept Rule
Deny (or Reject) Rule
Forward Chain
Masquerading
Port Redirect
Logging
Pulling it Together
Troubleshooting and Testing
Analyzing the Log File
Distributed Firewalling
Publications
Web site URL's
Email: krampwd@fingerlakes.edu
Home Page: http://paws.flcc.edu/~krampwd
Other information: Bill Kramp, Network Administrator, Finger Lakes Community College
Download presentation source
Sample rc.firewall File
Please read the disclaimer.