Live CD, ISO of firewall and/or security tools

Network Security Toolkit bootable ISO live CD designed to provide easy access to best-of-breed open source network security applications
  http://www.networksecuritytoolkit.org/nst/index.html
   
Devil-Linux
a CD-based Linux distribution for firewalls and routers that can also be used as Proxy Server,DNS Server, Mail Server with TLS support and Spam and Virus filtering, HTTP Server, FTP Server, File Server, VPNs with X.509 support, DHCP Server, NTP Server, IDS Node
  http://linuxmini.blogspot.com/2007/11/devil-linux-live-cd-firewall.html
   
Fire provide an immediate environment to perform forensic analysis, incident response, data recovery, virus scanning and vulnerability assessment

http://biatchux.dmzs.com/
   
PLAC a business card sized bootable cdrom that has network auditing, disk recovery, and forensic analysis tools
  http://sourceforge.net/projects/plac/
   
 BackTrack  live linux distribution software with a suite of security and forensic tools and provides a rich development environment
   http://www.remote-exploit.org/index.php/BackTrack