Complicated ipfw/ipf forwarding.

[Lowell Gilbert]

'Lewis Thompson' <purple at lewiz.net> writes:

> On Tue, Oct 28, 2003 at 09:39:23AM -0500, Jason Lavigne wrote:
> > > Could I have red.foo.bar forwarded to 192.168.0.2, pink.foo.bar
> > forwarded to 192.168.0.3 and say blue.foo.bar go to the local machine
> > 
> > wouldn't you use DNS (bind) for this? 
> 
> How?  I only have one external IP address (say 1.2.3.4) but behind the
> NAT machine I have many.  However, I have a.foo.com, b.foo.com and
> c.foo.com.  I want some IP forwarding software to rewrite the
> destination address from 1.2.3.4 based on the CNAME entry (in the same
> way Apache can do).

How would the IP forwarding software *know* about the CNAME entry?
In Apache's case, the HTTP request tells it, but other protocols don't
necessarily include the domain name that the client is using.