"I don't think that would make sense. If an intruder could exploit the web server to gain root privileges, why would he stop from changing the iptables rules?"
I would disagree. If any other device on the network (or DMZ, were you to create one) were compromised, they could be used to attack the web server without the 'hostile' traffic traversing the firewall. Assuming the performance hit is acceptable I would see no reason not to employ a basic IPTables ruleset on the webserver. Rgds --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.493 / Virus Database: 292 - Release Date: 25/06/2003 --------------------------------------------------------------------------- Evaluating SSL VPNs' Consider NEOTERIS, chosen as leader by top analysts! The Gartner Group just put Neoteris in the top of its Magic Quadrant, while InStat has confirmed Neoteris as the leader in marketshare. Find out why, and see how you can get plug-n-play secure remote access in about an hour, with no client, server changes, or ongoing maintenance. Visit us at: http://www.neoteris.com/promos/sf-6-9.htm ----------------------------------------------------------------------------