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Help! DNS A Records only ones getting filtered. (self.selfhosted)

submitted 3 weeks ago by Bluesheep to c/selfhosted

19 comments fedilink hide all child comments

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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[–] [email protected] 2 points 3 weeks ago

Not sure how technitium works but just from my selfhosting experience are you sure your not hitting dns-rebinding protection somwhere.

In short DNS rebinding stops domains from being resolved to private IP ranges so you don't end up back in your Network when you seem to be resolving a public domain.

I have to set up any domains that resolve locally in my router (which also does DNS and DHCP) but not sure if that's necessary with technitium