this post was submitted on 07 Feb 2025
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Help! DNS A Records only ones getting filtered. (lemmy.world)
submitted 23 hours ago by Bluesheep@lemmy.world to c/selfhosted@lemmy.world
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I’m pulling my hair out over this. I’ve got a proxmox homelab, an LXC running technitium installed from TTeck’s script.

The DNS server is also doing DHCP for my network. I have an authoritative zone for ‘.lan’

I can get NS, SOA, TXT records from the DNS server, but no A records! The DNS query logs show that it gives an answer, and if I am on the DNS server itself I get an answer, but no other machines on the network hear the reply.

I think this means the DNS server is working properly. There are no FWs in the way as I can resolve other types.

Where else can I look, or how can I diagnose this? I am completely at a loss.

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[–] hemmes@lemmy.world 1 points 20 hours ago (1 children)

How exactly are you testing this from your client, with ping? What are you using to query the DNS?

If you run nslookup from the client

  • Does the ‘server’ command return the correct DNS server?
  • Does .lan return the expected record?

I’m assuming you’ve run ifconfig to verify your client’s NIC has been assigned the correct DNS via DHCP?

[–] Bluesheep@lemmy.world 1 points 19 hours ago

Thanks for replying, I appreciate the response.

I’m running dig @192.168.0.249 study.lan from my client (a MacBook).

If I run ‘dig @192.168.0.249 study.lan TXT’ I get a correct response (I have added a txt record)

If I run ‘dig @192.168.0.249 lan SOA’ or ‘NS’ I correctly get the records for the zone.

I think this eliminates the possibility of it being a routing error?