Anti-Spam SMTP Proxy Server implements multiple spam filters
Single Packet Authorization, Port Knocking
AWStats Log Analyzer
A network security analysis and monitoring toolkit Linux distribution.
MAX Privacy with Robolinux R12.12
SKUDONET Open Source Load Balancer and Web Application Firewall
Anti Spam SMTP Gateway
Old School Light Weight Network Forensic Tool
Open Source PKI solutions
Framework that allows the user to take advantage of implementations
Virtual Appliance of RadicalSpam
Open Source Anti-Spam and Anti-Virus Gateway
This tool locks down Linux and UNIX systems.
Multithreaded Proxy Enumeration Utility
Collection of security checks for Linux
Perl Hacking Tools (BackTrack)