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DNS trouble with pihole running with podman (jlai.lu)

submitted 1 month ago* (last edited 1 month ago) by [email protected] to c/selfhosted

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Hi people. I am running pihole under podman and its dedicated system account on my NAS. Now, from the NAS, I get a connection refused on ip.of.the.nas:53 but everywhere else in my network, pihole works perfectly. To run pihole as a rootless container, i made it listen on 1053 and I have a firewall redirection from 53 to 1053 for both udp and tcp. Any pointer to where (and how) I can debug this ?

Edit: Small precision about my current setup : ISP router (so I can't really do anything on it) and NAS running opensuse leap

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[–] BluescreenOfDeath 2 points 1 month ago (6 children)

I agree.

So the solution, OP, is to set the DNS settings on your NAS to your router's internal IP so the firewall can redirect the traffic to your new port.

[–] [email protected] 1 points 1 month ago (5 children)

As it's only single device I'd suggest configuring DNS server for that to :1053. Port forwarding rule on the nas firewall most likely applies only to 'incoming' traffic to the nas and as locally generated DNS request isn't 'incoming' (you can think it as 'incoming' traffic is everything coming via ethernet cable into the nas) then the port redirection doesn't trigger as you're expecting.

[–] BluescreenOfDeath 2 points 1 month ago* (last edited 1 month ago) (4 children)

An inbound only DNS forwarding rule would be pointless. All DNS queries should be originating from within the network.

EDIT

I think I see what you're getting at. Assuming that the firewall is running on the NAS vs on the router.

The OP doesn't specify, but I would assume the firewall rule would be on the router, as that makes the most sense to force all DNS requests on the network to go through the pihole.

[–] [email protected] 1 points 1 month ago

I am still using my ISP's router, so the firewall rule is on the NAS (for now it is almost a do it all server), otherwise I would run the pihole on the router I think

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