[plug] Strange DNS issue

[Onno Benschop]

Your DNS domain appears to be reddog.domain.local, rather than domain.local

--
finger painting on glass is an inexact art - apologies for any errors in
this scra^Hibble

()/)/)() ..ASCII for Onno..

On Mon, 8 Dec 2025, 16:01 Alex H. via plug, <plug at plug.org.au> wrote:

> We are dealing with a rather strange DNS issue and I am hoping somebody
> will be able to assist us with understanding.
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> Via DHCP we are allocated two DNS servers
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> *resolvectl Global         Protocols: -LLMNR -mDNS -DNSOverTLS
> DNSSEC=no/unsupported  resolv.conf mode: stubLink 2 (eth0)    Current
> Scopes: DNS         Protocols: +DefaultRoute -LLMNR -mDNS -DNSOverTLS
> DNSSEC=no/unsupportedCurrent DNS Server: 10.1.1.1       DNS Servers:
> 10.1.1.1 10.1.1.2        DNS Domain: reddog.domain.localLink 3
> (enP28932s1)    Current Scopes: none         Protocols: -DefaultRoute
> -LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported*
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> The reverse lookup completes successfully
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> *dig -x 10.1.1.1* and *dig -x 10.1.1.2* both correctly resolve to the DNS
> server's hostnames
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> However the forward lookup fails
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> *dig dnsserver1.domain.local -> Fails*
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> *dig dnsserver2.domain.local -> Fails *
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> However with specifying the DNS server explicitly the requests complete
> successfully
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> *dig @10.1.1.1 <http://10.1.1.1> dnsserver1.domain.local -> Works*
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> *dig @10.1.1.1 <http://10.1.1.1> dnsserver2.domain.local -> Works *
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> *dig @10.1.1.2 <http://10.1.1.2> dnsserver1.domain.local -> Works*
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> *dig @10.1.1.2 <http://10.1.1.2> dnsserver2.domain.local -> Works*
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> I don't understand why it works when we set the DNS server and fails when
> using the default system DNS servers.
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> Kind regards
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> Alex
> _______________________________________________
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>
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