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Here is how I would diagnose (I'm assuming you have Linux / WSL on a client)
dig $domain check which server answereddig a $domain should give a recorddig a $domain @server to make sure you're querying the right serverIf none work, probably network issue (DNS boind to wrong IP, firewall, etc)
If 3 and 5 work but 4 doesn't, your DNS isn't authorative.
If only 5 works DNS settings on the client is wrong.
You also could do nslookup on Windows
Thanks for giving it some thought!
I have been testing using dig @192.168.0.249 study.lan
3, 4, and 5 work for TXT, NS and SOA but doesn’t work for A records. I think this rules out a simple network issue?
Just to be sure you do dig A @server $domain (with the "A") and can confirm the following
SERVER is your server
;; ANSWER SECTION is empty (or doesn't exist)
;; AUTHORITY SECTION mentions your local DNS server
Also check
dig NS @server $domain
Is your server in the answer section?
Yes, everything looks right. I moved dhcp resolution from the router to technitium recently, but hadn’t set up local resolution.
I’m currently thinking the router is the culprit. Here in the UK there are lots of forum posts complaining about the Virgin Media gear. Nothing specifically describes my problem but I’m going to try a new router over the weekend.
Seems weird to me, the router would need to do deep packet inspection of DNS and selectively block specific ones. It feels more like you've set up your DNS to do forwarding instead of resolution. Can you post a network diagram and the DNS config?
Run Wireshark on the client to see if you actually got the reply.
Thanks for the suggestion, I’ll grab a cap to check.
I’m running tcpdump -i any port 53. I can see the outbound request but not the reply. Will the cap show me anything more?
Do tcpdump host $server instead. Otherwise you will only see the request (the response goes to a different port).
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
I’m assuming you’ve run ifconfig to verify your client’s NIC has been assigned the correct DNS via DHCP?
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?