Abstract
Defcon?s Capture the Flag (CtF) game is the largest open computer security hacking game. This year?s CtF hat rules that made it particularly difficult to be a successful defender. We entered an Immunix server, comprised of five years of IA&S, OASIS, FTN, and CHATS technologies, to see whether this system could survive sustained attack from determined experts. We describe our experience surviving Defcon CtF.