Re: DNAT based on domain name instead of IP address

[Shawn <core@enodev.com>]

Yeah, only he does not have any "one true apache" server answering. I
thnik that is, however, what he /should/ do.

On Wed, 2004-01-28 at 17:47, Erik Bourget wrote:
> Glen Lee Edwards <glen@holiness.ch> writes:
> 
> > I have several domains that use the same IP address.  Can I DNAT them to
> > different servers based on domain name instead of IP address using
> > iptables?  I've tried the following, but it isn't working:
> >
> > iptables -t nat -A PREROUTING -p tcp -d 1st.domain.com --dport 80 -j
> > DNAT --to-destination 192.168.1.12:80
> >
> > iptables -t nat -A PREROUTING -p tcp -d 2nd.domain.com --dport 80 -j
> > DNAT --to-destination 192.168.1.13:80
> >
> > Everything is being forwarded to 192.168.1.12 no matter which domain is
> > used.  It appears that the domains are first being translated into the
> > IP address, which is used instead.
> 
> TCP packets know nothing of DNS ... an application will 1) look up the name at
> a DNS server, 2) retrieve the IP from the DNS server, and 3) connect to the IP
> address.
> 
> Apache can do virtual domains ... HTTP 1.1 requires that you specify the
> domain name.
> 
> - Erik
> 
>