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Re: Address 127.0.1.1

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On Fri, May 24, 2024 at 11:13 AM Paul M Foster <paulf@quillandmouse.com> wrote:
>
> Folks:
>
> In my /etc/hosts file, there's a line:
>
> 127.0.1.1 yosemite.mars.lan yosemite
>
> I think Debian put it there.
>
> Later in the file, I've got:
>
> 192.168.254.30  yosemite.mars.lan   yosemite
>
> So there are two entries for the same (my) machine. Is this a problem?
> Specifically, could it cause problems with email (Exim4 or OpenSMTPD)?

127.0.1.1 is traditionally used for the fully qualified domain name
(fqdn). So I would expect to see 'yosemite.mars.lan', but not
'yosemite'.

Also, fqdn's end in dot '.' to denote the top of the dns tree. So I
would expect to see 'yosemite.mars.lan.' (note the trailing dot), and
not 'yosemite.mars.lan' (note the lack of the trailing dot). What can
happen with 'yosemite.mars.lan' is, search domains can be added to it.
So if dhcp says 'isp.com' is a search domain, then your network stack
might make requests for 'yosemite.mars.lan.isp.com'.

Jeff

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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

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