The fact of the matter is that there are *many* ways to tunnel traffic through a firewall. You have all of the aforementioned along with LOKI, HPING, any of the B/O agents, etc.. Hell, even VNC *could* tunnel traffic through using Stunnel (SSH tunneling app). The bottom line is your ability to use any of these methods depends on the firewall itself (is it a piece of crap), your skills and/or the ability of the FW admin to properly create ACLs.

--TH13