Re: Multiple host names for a single server?

[Thomas Pircher <thp+debian@p5r.uk>]

Tom Browder wrote:
> I know I can define them with individual A records (with the same IP)
> with my domain host provider, but will that cause problems conflicting
> with a single physical hostname of, say, "pluto.example2.net"?

Depends on the service. For SMTP, some servers check that results of a
forward and reverse DNS lookup match. See e.g.:

https://mxtoolbox.com/problem/smtp/smtp-reverse-dns-mismatch

You probably want to configure the SMTP service on the machine to use
the DNS PTR name of your public IP address in the EHLO message (e.g. the
myhostname setting in Postfix).

For other services you could consider CNAME records, as John Doe
suggests.

Thomas