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Re: systemd-resolved resolving fails sometimes on Debian12

From jeremy ardley <jeremy.ardley@gmail.com>
Newsgroups linux.debian.user
Subject Re: systemd-resolved resolving fails sometimes on Debian12
Date 2024-03-03 10:30 +0100
Message-ID <IdQkp-e6Qx-5@gated-at.bofh.it> (permalink)
References <Id8jn-dFmJ-1@gated-at.bofh.it> <Idhwl-dLtL-3@gated-at.bofh.it> <Idztf-dWzA-3@gated-at.bofh.it> <IdHTP-e1Ed-1@gated-at.bofh.it> <IdMgN-e4oY-1@gated-at.bofh.it>
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On 3/3/24 12:43, Victor Sudakov wrote:
> Not that I would use bind9 as a caching resolver but still, how
> do you pass the dynamically obtained AWS DNS server address from
> systemd-networkd to bind9 ?


The AWS DNS resolver IPs are static and are widely published.

It is permissible to not use AWS resolvers for upstream.

If you want to use AWS resolvers you may run into the problem that some 
RBL services reject queries from 'well known' free DNS servers; that may 
include AWS resolver addresses.

systemd-networkd without systemd-resolved maintains a list of DNS 
servers in /etc/resolv.conf that can be used by local services.

You can override dynamic setting of the dns resolvers in the 
systemd-networkd configuration to use a local caching resolver such as 
bind9, usually listening at 127.0.0.1:53

You can then configure bind 9 as a caching only DNS resolver and set 
appropriate upstream (forwarder) sites, or none at all defaulting to the 
root servers.

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Thread

systemd-resolved resolving fails sometimes on Debian12 Victor Sudakov <vas@sibptus.ru> - 2024-03-01 11:30 +0100
  Re: systemd-resolved resolving fails sometimes on Debian12 jeremy ardley <jeremy.ardley@gmail.com> - 2024-03-01 21:20 +0100
    Re: systemd-resolved resolving fails sometimes on Debian12 Victor Sudakov <vas@sibptus.ru> - 2024-03-02 16:30 +0100
      Re: systemd-resolved resolving fails sometimes on Debian12 jeremy ardley <jeremy.ardley@gmail.com> - 2024-03-03 01:30 +0100
        Re: systemd-resolved resolving fails sometimes on Debian12 Victor Sudakov <vas@sibptus.ru> - 2024-03-03 06:10 +0100
          Re: systemd-resolved resolving fails sometimes on Debian12 jeremy ardley <jeremy.ardley@gmail.com> - 2024-03-03 10:30 +0100
            Re: systemd-resolved resolving fails sometimes on Debian12 Victor Sudakov <vas@sibptus.ru> - 2024-03-03 16:00 +0100
              Re: systemd-resolved resolving fails sometimes on Debian12 jeremy ardley <jeremy.ardley@gmail.com> - 2024-03-04 07:30 +0100
                Re: systemd-resolved resolving fails sometimes on Debian12 Noah Meyerhans <noahm@debian.org> - 2024-05-21 21:40 +0200
      Re: systemd-resolved resolving fails sometimes on Debian12 Marco Moock <mm@dorfdsl.de> - 2024-03-04 08:40 +0100

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