Trouble configuring DNS with Debian 12 for host names in local domain

I'm running Debian 12.1 using Vagrant on HyperV and connecting to a network using a virtual switch.
If I try to access resources on the public internet it works fine, but it fails to resolve resources on my local domain.

The DHCP lease seems correct from `/var/lib/dhcp/dhclient.eth0.leases`

Code:

default-duid "\000\001\000\001,\240\017\004\000\025]\012\016\307";lease {  interface "eth0";  fixed-address 172.23.230.141;  option subnet-mask 255.255.240.0;  option dhcp-lease-time 86400;  option routers 172.23.224.1;  option dhcp-message-type 5;  option domain-name-servers 172.23.224.1;  option dhcp-server-identifier 172.23.224.1;  option dhcp-renewal-time 43200;  option dhcp-rebinding-time 64800;  option domain-name "mshome.net";  option netbios-node-type 4;  renew 4 2025/01/09 23:34:54;  rebind 4 2025/01/09 23:34:54;  expire 4 2025/01/09 23:34:54;}lease {  interface "eth0";  fixed-address 172.23.230.141;  option subnet-mask 255.255.240.0;  option dhcp-lease-time 86400;  option routers 172.23.224.1;  option dhcp-message-type 5;  option domain-name-servers 172.23.224.1;  option dhcp-server-identifier 172.23.224.1;  option dhcp-renewal-time 43200;  option dhcp-rebinding-time 64800;  option domain-name "mshome.net";  option netbios-node-type 4;  renew 5 2025/01/10 09:06:34;  rebind 5 2025/01/10 17:34:57;  expire 5 2025/01/10 23:34:57;}

172.23.224.1 is the address for the virtual switch and also the DHCP/DNS server
If I manually specify a DNS server; then name resolution succeeds

Code:

nslookup my.domain.local 172.23.224.1

But it fails if I don't.

Resolvconf is running

Code:

● resolvconf.service - Nameserver information manager     Loaded: loaded (/lib/systemd/system/resolvconf.service; enabled; preset: enabled)     Active: active (exited) since Fri 2025-01-10 00:47:55 UTC; 8min ago       Docs: man:resolvconf(8)    Process: 2569 ExecStart=/sbin/resolvconf --enable-updates (code=exited, status=0/SUCCESS)   Main PID: 2569 (code=exited, status=0/SUCCESS)        CPU: 1msJan 10 00:47:55 debian systemd[1]: Started resolvconf.service - Nameserver information manager.

And the contents of `/etc/resolv.conf` is

Code:

# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)#     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN# 127.0.0.53 is the systemd-resolved stub resolver.# run "resolvectl status" to see details about the actual nameservers.nameserver 4.2.2.1nameserver 4.2.2.2nameserver 208.67.220.220search mshome.net

I'm pretty sure that I've got an issue with how resolv is configured but don't know how to proceed from here
Any help is appreciated.

Statistics: Posted by Chronocide0 — 2025-01-10 01:02 — Replies 2 — Views 79