Re: Address 127.0.1.1

From	Greg Wooledge <greg@wooledge.org>
Newsgroups	linux.debian.user
Subject	Re: Address 127.0.1.1
Date	2024-05-24 17:50 +0200
Message-ID	<IHFl7-fwN0-3@gated-at.bofh.it> (permalink)
References	<IHBUd-fuUh-3@gated-at.bofh.it> <IHEp3-fwe2-9@gated-at.bofh.it> <IHES5-fwCW-3@gated-at.bofh.it> <IHF1L-fwGk-3@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Show all headers | View raw

On Fri, May 24, 2024 at 05:22:14PM +0200, Marco Moock wrote:
> Am 24.05.2024 um 17:17:45 Uhr schrieb tomas@tuxteam.de:
> 
> > On Fri, May 24, 2024 at 04:49:18PM +0200, Marco Moock wrote:
> > 
> > [...]
> > 
> > > If you operate mail servers, you must have a FQDN. .lan can't be
> > > used for the global DNS stuff, so set a proper FQDN that belongs to
> > > you.  
> > 
> > I think this is wrong in that sweeping generality.
> 
> In the case it should communicate with other MTAs in the internet, this
> will be true because many of them require a resolvable (also reverse)
> FQDN in HELO/EHLO that matches the IPv4/IPv6 addresses of the server.

Most MTAs do not look in /etc/hosts when reading their configuration.
Whatever name they identify with (in the HELO or EHLO command) comes
from some MTA-specific configuration file.

Thus, the contents of /etc/hosts are for *other* things, not related to
MTA configuration.  Just being able to resolve your own hostname to any
address that "works" is the goal.  127.0.1.1 works well for this, which
is why Debian uses it as the default.  If you've got a static LAN address,
you can use that instead.

Thread

Address 127.0.1.1 Paul M Foster <paulf@quillandmouse.com> - 2024-05-24 14:10 +0200
  Re: Address 127.0.1.1 Greg Wooledge <greg@wooledge.org> - 2024-05-24 14:20 +0200
  Re: Address 127.0.1.1 Dan Ritter <dsr@randomstring.org> - 2024-05-24 14:40 +0200
  Re: Address 127.0.1.1 Marco Moock <mm@dorfdsl.de> - 2024-05-24 16:50 +0200
    Re: Address 127.0.1.1 <tomas@tuxteam.de> - 2024-05-24 17:20 +0200
      Re: Address 127.0.1.1 <tomas@tuxteam.de> - 2024-05-24 17:30 +0200
      Re: Address 127.0.1.1 Marco Moock <mm@dorfdsl.de> - 2024-05-24 17:30 +0200
        Re: Address 127.0.1.1 Greg Wooledge <greg@wooledge.org> - 2024-05-24 17:50 +0200
          Re: Address 127.0.1.1 Paul M Foster <paulf@quillandmouse.com> - 2024-05-24 18:20 +0200
          Re: Address 127.0.1.1 Joe <joe@jretrading.com> - 2024-05-24 18:50 +0200
            Re: Address 127.0.1.1 Paul M Foster <paulf@quillandmouse.com> - 2024-05-24 19:20 +0200
              Re: Address 127.0.1.1 Andy Smith <andy@strugglers.net> - 2024-05-24 23:40 +0200
            Re: Address 127.0.1.1 Greg Wooledge <greg@wooledge.org> - 2024-05-24 19:40 +0200
      Re: Address 127.0.1.1 Joe <joe@jretrading.com> - 2024-05-24 18:50 +0200
        Re: Address 127.0.1.1 <tomas@tuxteam.de> - 2024-05-24 19:20 +0200
  Re: Address 127.0.1.1 Greg Wooledge <greg@wooledge.org> - 2024-05-24 19:50 +0200
    Re: Address 127.0.1.1 Jeffrey Walton <noloader@gmail.com> - 2024-05-24 20:00 +0200
      Re: Address 127.0.1.1 Greg Wooledge <greg@wooledge.org> - 2024-05-24 20:30 +0200
        Re: Address 127.0.1.1 debian-user@howorth.org.uk - 2024-05-24 23:30 +0200
  Re: Address 127.0.1.1 Jeffrey Walton <noloader@gmail.com> - 2024-05-24 19:50 +0200
    Re: Address 127.0.1.1 David Wright <deblis@lionunicorn.co.uk> - 2024-05-24 19:50 +0200

csiph-web