Virtual Hosting Howto

[Kevin Darcy]

The DNS part of this task is just to arrange for multiple names to resolve
to the same IP address. This can be done either by aliasing one or more
names to an A record, e.g.

(in the mydomain.net zone)
www    in    a    1.2.3.4

(in the yourdomain.org zone and any other zones)
www    in    cname    www.mydomain.net.

or by having multiple A records with the same address, e.g.

(in the mydomain.net zone)
www    in    a    1.2.3.4

(in the yourdomain.org zone and any other zones)
www    in    a    1.2.3.4

(note that the second approach is *mandatory* in the case of names which
also happen to be domain names, e.g. "yourdomain.org", since CNAMEs can't
co-exist with other record types, like the domain's SOA or NS records).
The downside of the first approach is that you have multiple places to
maintain the address information, and a reverse-lookup ambiguity is
created, i.e. should 1.2.3.4 reverse-lookup to www.mydomain.net or
www.yourdomain.org?

Everything beyond that is a matter of webserver configuration, which is
beyond the scope of this list and the reference materials you cited.


- Kevin

hunter.scott at ghc.org wrote:

> I'd like to resolve multiple FQDNs to a single IP address so I can host
> other sites on my IP.  I've searched through ORA DNS&BIND, RFC 1034 and
> this NG and have had no luck finding info on this topic.
>
> Im guessing this is done with multiple SOA records or something like
> that.
>
> Can anyone help with an example that points www.mydomain.net and
> www.yourdomain.org to the same IP addy?
>
> Thanks
>
> Scott Hunter
> scott at surrealistic.org
>
> Sent via Deja.com http://www.deja.com/
> Before you buy.