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
As it’s only single device I’d suggest configuring DNS server for that to <ip-of-nas>: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.
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.
If the firewall was running on a router then you’d need to DNAT back to the same network from which they originated and that is (in general) quite a PITA to get running properly. My understanding is that the firewall doing port forwarding is running on the NAS. And we don’t have much information on what that ‘NAS’ even is, I tend to think devices like qnap or synology when talking on NAS-boxes, but that might as well be a full linux-system just running CIFS/NFS/whatever.
OP could obviously use his router as a DNS server for the network and set upstream DNS server for the router to pihole, but that’s a whole different scenario.
For now my NAS it not really running anything (I want to have proper DNS/IDM before starting any other service and for storage I think I may go with owncloud ocis or nextcloud)