I am running TrueNAS Scale v25.04.1 and I am trying to install pi-hole to use as a local DNS alongside nginx-proxy-manager; however, when I try to install pi-hole via the Apps selection from TrueNAS or by a docker-compose.yaml file get an error stating that the port ‘53’ is in use.
So to verify I ran the following command:
sudo lsof -i -P -n | grep LISTEN | grep :53 and sure enough the output stated dnsmasq 8880 nobody 9u IPv4 38385 0t0 TCP 10.189.97.1:53 (LISTEN)
I thought maybe It was due to possibly one of the Apps I already had running but none of them displayed using port 53, so to be a bit more thorough I started stopping most of the Apps running to see if anything would change, I did not shutdown all of them but the most used as well as the most likely apps, with no change. so Now I’m stuck wondering if this is just due to how TrueNAS Fangooth works? And if that is the case how can I install pi-hole so that I can use it alongside nginx-proxy-manager, for local SSL.