Firewalls with Iptables

Prerequisites

• First two videos on firewalls

Summary

• Extensive coverage of iptables and iptables syntax, firewall policies, and attacks: SYN flood & ping flood (smurf attack).

Video 

http://online1.daytonastate.edu/player2.php?id=d1ee59e20ad01cedc15f5118a7626099

• 28:13 - nano text editor usage
• 28:58 - How to install vi (vim) in Ubuntu
• 29:15 - Review of execute permissions
• 29:35 - Using vim to edit the firewall rules shell script
• 36:24 - Review of chmod command
• 36:53 - netstat command usage
• 37:11 - How to install vsftpd
• 37:22 - How to install openssh-server
• 37:48 - Running the firewall rules shell script
• 38:07 - Listing the active iptables firewall rules
• 38:45 - Testing FTP access with active firewall rules
• 39:33 - Testing SSH access
• 40:35 - Re-enabling SSH access
• 41:13 - Testing SSH access again (this time successful)
• 41:37 - Testing ping (accepted)
• 41:52 - Testing ping (rejected)

Reference Materials

• Guide to Network Defense and Countermeasures - Chapter 11 (pgs. 439-444)
• http://www.netfilter.org/documentation/index.html - Netfilter/iptables Documentation
• http://www.vim.org/docs.php - Vim Documentation

Additional Information

• Logging: http://www.thegeekstuff.com/2012/08/iptables-log-packets/

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