How do I configure a firewall/proxy with ipchains, to access a internal web server? I have set up an alias for the web server at eth2:1 on an external ip. Though, it has an internal ip of 192.168... - Help!

I run RedHat 6.0 if that makes any difference.
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What you want is the IPPORTFW.
Check out the IP Masq HOWTO especially the Port Forwarding for 2.2 section... This URL takes you directly to it...

You also might want to check out the Linux Router Project. A complete Firewall solution that fits on a single floppy.
Which kernel are you using?  if you are using 2.2.x, then you should use the following:

ipchains -P forward DENY
ipchains -A forward -s intnet/inmask -d -j MASQ
ipchains -A forward -s -d pub_addr 80 -j MASQ
ipmasqadm portfw -a -P tcp -L pub_addr 80 -R int_addr 80

where intnet is the internal network number (ie.
and inmask is the internal network mask (ie. and
pub_addr is the address that someone would use on the internet to get to you and int_addr is the internal IP address of the box running the Web Server.

  Hope this helps...

   --- Joel

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Linux Networking

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