Hi everyone,
I have purchased 5 ip addresses so I can host my own servers. I have a red hat 7.2 box, that I would like to use as a firewall. I want to use this as a firewall for each pc. I want to use the red hat box as a dns server and a firewall. I just need to know hot to set it up as a firewall for five ip addresses. Just to be a little more clear they are not internal private ip addresses. Say I had the ip 69.243.192.185 and 69.243.192.186. How would I forward port 80,25,21,22, and 110 to ip 69.243.192.185, and then port 53 to ip 69.243.192.186. So i need to first set it up as a firewall for five ip's, and then set up port forwarding for 2 of the five ip's.

iptables www.netfilter.org
also read networking howtos at www.tldp.org

use the (front-)box with one of your official ip addresses. use the REDIRECT rule from iptables to move a query to the specific machine (can be any ip) into your intern lan.

man iptables and the above links should give you a overview of what's to do.

sl mritch.

Also, make sure you update that Red Hat box before you put it on the Internet, or your firewall will soon become a failedwall. RH 7.2 is horribly obsolete and there are dozens and dozens of known security vulnerabilities with it.