Excuse me for my incomplete email. Here is the complete one : Hi all, I have begun to work with firewalls recently and I have to work with linux's netfilter. So, I'v some basic questions about it. We (my coworkers in University of Tehran and I) have decided to use the linux's firewall to have it make our testing framework. anyway: 1 - Is it needed to remove the current iptables module, if I decide to use a newer version ? 2 - Where is a basic hands on document about it, so I can learn to manage my firewall from core (i mean installation, rule management ...) , and basically learn how to handle it. thank you, --Afshin _________________________________________________________________ STOP MORE SPAM with the new MSN 8 and get 2 months FREE* http://join.msn.com/?page=features/junkmail