Like a few other comments already, I would also recommend using iptables -- it's a stateful inspection firewall that's included with every Linux distribution I've come across, and also crops up in many/all? Linux appliance firewalls. "iptables -L" will print the firewall rules to the screen if iptables is installed and running.
Some folks like to write their firewall rules by hand, but there is also an excellent piece of open source called fwbuilder - again, some others have already mentioned it in this thread. In my experience fwbuilder can be a real pain to install with certain Linux distributions, but those problems completely disappear using gentoo linux. -Roger VNU BUSINESS PUBLICATIONS LIMITED (VNU) 32-34 Broadwick Street, London, W1A 2HG Tel: +44 (0) 20 7316 9000� Fax: +44 (0) 20 7316 9003 This e-mail is confidential and is intended for the use of the addressee only. If you are not the intended recipient, you are hereby notified that any use or dissemination of this communication or any part of it is strictly prohibited. If you receive this transmission in error, please notify VNU immediately using the contact details above and then delete this e-mail. Please note that e-mail may be susceptible to data corruption, interception and unauthorised amendment. VNU does not accept any liability for any such corruption, interception, amendment or the consequences thereof. _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.netsys.com/full-disclosure-charter.html
