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Re: NetworkManager with dnsmasq caching NXDOMAIN response of router

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On 8 Jul 2024 01:03 +0200, from ayers@fsfe.org (David Ayers):
> Hello everyone!
> 
> My Debian 12/bookworm laptop uses DHCP with NetworkManager which
> produce an /etc/resolv.conf containing:
> # Generated by NetworkManager
> ```
> search home
> nameserver 192.168.1.254
> ```

Note that .home is somewhat of a special snowflake with regards to
TLDs. It was suggested as the default for HNCP in 2016 (RFC 7788
section 8 <https://www.rfc-editor.org/rfc/rfc7788#section-8>);
rejected as a gTLD in 2018
<https://www.icann.org/en/board-activities-and-meetings/materials/approved-board-resolutions-regular-meeting-of-the-icann-board-04-02-2018-en#2.c>;
and then the usage from RFC 7788 was effectively superceded by the
recommendation and assignment for non-unique use of home.arpa a few
months later in RFC 8375 <https://www.rfc-editor.org/rfc/rfc8375>.

This may or may not have anything to do with your issues; but in
general, making up own TLDs and hoping that they will never conflict
with public ones is a bad idea these days. Just look at how many
internal names suddenly started having issues after Google was
assigned .dev in 2019; to say nothing of that they made it a
preloaded-HSTS TLD.

It's better to either use .home.arpa (which is specifically reserved
for the purpose) or to actually register a domain (even if the name
server delegations are bogus so it never meaningfully resolves on the
public Internet).

-- 
Michael Kjörling                     🔗 https://michael.kjorling.se
“Remember when, on the Internet, nobody cared that you were a dog?”

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NetworkManager with dnsmasq caching NXDOMAIN response of router David Ayers <ayers@fsfe.org> - 2024-07-08 01:20 +0200
  Re: NetworkManager with dnsmasq caching NXDOMAIN response of router jeremy ardley <jeremy.ardley@gmail.com> - 2024-07-08 06:10 +0200
    Re: NetworkManager with dnsmasq caching NXDOMAIN response of router David Ayers <ayers@fsfe.org> - 2024-07-08 12:00 +0200
      Re: NetworkManager with dnsmasq caching NXDOMAIN response of router Detlef Vollmann <dv@vollmann.ch> - 2024-07-10 15:20 +0200
        Re: NetworkManager with dnsmasq caching NXDOMAIN response of router Greg Wooledge <greg@wooledge.org> - 2024-07-10 15:20 +0200
          Re: NetworkManager with dnsmasq caching NXDOMAIN response of router songbird <songbird@anthive.com> - 2024-07-11 01:00 +0200
  Re: NetworkManager with dnsmasq caching NXDOMAIN response of router jeremy ardley <jeremy.ardley@gmail.com> - 2024-07-08 05:50 +0200
  Re: NetworkManager with dnsmasq caching NXDOMAIN response of router Michael Kjörling <c9bc136c6063@ewoof.net> - 2024-07-08 09:50 +0200

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