Apache (v)hosts on separate machines? Only 1 IP, proxy?

I have only one IP address, but need several sites (or vhosts), on
different machines (one UNIX, one Windows, etc.) the machines are
using NAT, and are behind a firewall/router, port 80 is open and can
be mapped to one internal NAT IP. The router is not very fancy.

I want all the websites to work on port 80. Ideally on different
machines, running Apache server instances. I could map drives, use
samba, etc. and just use one Apache installation w/ vhosts...

But, I'm curious, how could this be set up so that Apache (with some
mod perhaps, proxy?) could send http requests based on header to the
appropriate server machine.

Each server has 1 NIC. Though I suppose the UNIX ones could have
virtual interfaces (not that this is necessarily relevant)?

I don't understand the proxy concept so well, (nor many others), so
please forgive me if they are also irrelevant here.

Thanks for your time, and possible solutions!

-M

Mooky Mooksgill <starman7.TakeThisOut@hotmail.com> wrote:
 > But, I'm curious, how could this be set up so that Apache (with some
 > mod perhaps, proxy?) could send http requests based on header to the
 > appropriate server machine.

Yes, use mod_proxy, you can 'map' the various machines as different
directories or servers on a single machine acting as 'portal'.

See the documentation of mod_proxy.

Davide

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