LinuxSecurity.com HOWTOs - How to harden my filesystem

For the *nix newbie who doesn't know the basics of securing his/her box.

CERT Advisory on UDP Port Denial-of-Service Attack.

CERT Advisory on TCP SYN Flooding and IP Spoofing Attacks.

A memo about defeating Denial of Service Attacks which employ IP source address spoofing.

Flask is an operating system security architecture that provides flexible support for security policies.