Yes, I know: Knoppix already contains many security packages like airsnort and kismet for wireless, nessun and nmap for network scanning, ethereal and ettercap for sniffing, ipchains and iptables for firewalling, httptunnel and stunnel for tunneling, etc.

But I feel something is missing...: Snort? Where is it (I mean with MySQL and ACID/Sguil preconfigured)?
What about a packet shaper (I'm thinking of Paketto Keiretsu)?
What about a port relay?
What about an advanced ICMP based scanner (I'm thinking of xprobe2)?
What about a GUI for ipchains and iptables (I'm thinking about FWbuilder)?
What about a DHCP/DNS spoofer (I'm thinking about DNSHijacker)?
What about a wardialer?
What about a password cracker (I'm thinking about THC-Hydra)?
What about a forensic suite (I'm thinking about The Coroner's Toolkit)?
What about a web assessment tool (I'm thinking of Exodus)?
What about a MAC address change tool?
What about a file integrity checker (I'm thinking about tripwire)?
What about an honeypot (I'm thinking about honeyd)?
What about a reverse HTTP backdoor?
...ok, I stop it...

Isn't enough to build a customized Knoppix distribution?

(For the ones thinking I think too much and no act at all , I need to explain that I'm not so skilled in linux to rearrange a Knoppix distro, so I only can hope someone will like this idea and realize it)