ASTALAVISTA SECURITY GROUP : Astalavista.com Security Directory - Wonderful (Have time? Nay!)

The Border Gateway Protocol web site - Some guy that has some stuff hosted here(Quite interesting!!)

RFC1948 - Defending Against Sequence Number Attacks

Denial of Service (DoS) Attack Resource Page

Requirements for Internet Hosts -- Communication Layers

RFC1323 - TCP Extensions for High Performance

RFC 1180 - TCP/IP tutorial