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 From:  "Chris Bagnall" <m0n0wall at minotaur dot cc>
 To:  <m0n0wall at lists dot m0n0 dot ch>
 Subject:  RE: [m0n0wall] Virtual host configuration
 Date:  Tue, 9 Nov 2004 11:45:52 -0000
> > I have a single dedicated IP coming into my monowall. I'm wanting to
> > NAT the external IP to two individual internal IP's 
> > ( This is a DMZ/Server network that 
> I'm wanting 
> > port 80 to listen on both of the internal IP's NATTED to 
> the external 
> > IP. How would this be done?

The best way to do this would be with an upstream proxy (squid or even
apache) listening on port 80. It then load-balances the connections between
your two webservers (I assume?) listening on port 80.

With apache you'd do it with the ProxyPass and ProxyPassReverse commands.
With Squid you'd need to look through the section in the manual on forward
proxying, but it's not particularly complex or difficult to do.

In this config you'd have m0n0 port forwarding 80 to a new internal machine,
say, which would then "proxy" the results from your existing

If you really can't use a separate machine for the task, run Squid on the
more powerful of your two webservers (proxying on port 80), then get it to
forward proxy (and load balance) between itself (run apache on 81), and the
other webserver. Or, if you're already running Apache on the more powerful
machine, define a new virtualhost containing the "true" webserver, running
on 81, then modify the default config to purely proxyPass for the two
servers one on localhost:81, and the other on the other machine.

Plenty of options to play with. Or, I could have completely misunderstood
what you're trying to do ;-)


C.M. Bagnall, Partner, Minotaur
Tel: (07010) 710715   Mobile: (07811) 332969   ICQ: 13350579
AIM: MinotaurUK   MSN: minotauruk at hotmail dot com   Y!: Minotaur_Chris
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