Groups > linux.debian.user > #204180

Re: Multiple host names for a single server?

From	Thomas Pircher <thp+debian@p5r.uk>
Newsgroups	linux.debian.user
Subject	Re: Multiple host names for a single server?
Date	2019-01-07 18:00 +0100
Message-ID	<xdGpP-1Ov-13@gated-at.bofh.it> (permalink)
References	<xdFN7-1AO-7@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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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

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Thread

Multiple host names for a single server? Tom Browder <tom.browder@gmail.com> - 2019-01-07 17:20 +0100
  Re: Multiple host names for a single server? Greg Wooledge <wooledg@eeg.ccf.org> - 2019-01-07 17:30 +0100
    Re: Multiple host names for a single server? Tom Browder <tom.browder@gmail.com> - 2019-01-07 18:50 +0100
  Re: Multiple host names for a single server? john doe <johndoe65534@mail.com> - 2019-01-07 17:30 +0100
    Re: Multiple host names for a single server? Tom Browder <tom.browder@gmail.com> - 2019-01-07 18:50 +0100
      Re: Multiple host names for a single server? Kushal Kumaran <kushal@locationd.net> - 2019-01-07 19:30 +0100
        Re: Multiple host names for a single server? Tom Browder <tom.browder@gmail.com> - 2019-01-07 22:20 +0100
      Re: Multiple host names for a single server? Andy Smith <andy@strugglers.net> - 2019-01-07 23:20 +0100
        Re: Multiple host names for a single server? Tom Browder <tom.browder@gmail.com> - 2019-01-07 23:40 +0100
  Re: Multiple host names for a single server? Joe <joe@jretrading.com> - 2019-01-07 17:40 +0100
    Re: Multiple host names for a single server? Tom Browder <tom.browder@gmail.com> - 2019-01-07 18:50 +0100
  Re: Multiple host names for a single server? Thomas Pircher <thp+debian@p5r.uk> - 2019-01-07 18:00 +0100

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