[plug] Strange DNS issue

[alex]

Just why does it work when I specify the DNS servers explicitly,  but not without it ?
-------- Original message --------From: Onno Benschop via plug <plug at plug.org.au> Date: 8/12/25  16:52  (GMT+08:00) To: PLUG mailing list <plug at plug.org.au> Subject: Re: [plug] Strange DNS issue 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. Via DHCP we are allocated two DNS servers 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/unsupportedThe reverse lookup completes successfully dig -x 10.1.1.1 and dig -x 10.1.1.2 both correctly resolve to the DNS server's hostnames However the forward lookup fails  dig dnsserver1.domain.local -> Failsdig dnsserver2.domain.local -> Fails  However with specifying the DNS server explicitly the requests complete successfully dig @10.1.1.1 dnsserver1.domain.local -> Worksdig @10.1.1.1 dnsserver2.domain.local -> Works dig @10.1.1.2 dnsserver1.domain.local -> Worksdig @10.1.1.2 dnsserver2.domain.local -> Works I don't understand why it works when we set the DNS server and fails when using the default system DNS servers. Kind regardsAlex_______________________________________________
PLUG discussion list: plug at plug.org.au
https://lists.plug.org.au/mailman/listinfo/plug
Committee e-mail: committee at plug.org.au
PLUG Membership: http://www.plug.org.au/membership

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.plug.org.au/pipermail/plug/attachments/20251208/c25c5881/attachment.htm>