This are all riddles from firewalls 2.6 to 3.0.
NOTE: Please don't use this guide just because it's easy, solving the puzzles yourselve is alot more fun! Only use it if you REALLY, really can't find a riddle. Thanks!
247.140.133.168 - reverse.txt
Problem: Reverse DNS
Solution: Contact the system owner and tell him to enable the reverse DNS.