lsof -i :53
OR
netstat -tulpn | grep ":53 "
sudo systemctl disable systemd-resolved.service
sudo systemctl stop systemd-resolved.service
same problem getting this error:
#Failed to disable unit: Unit file systemd-resolved.service does not exist.
#Failed to stop systemd-resolved.service: Unit systemd-resolved.service not loaded.
same
On casaos/rpi, the port 53 is occupied by docker-proxy process and not systems. Hence the commands wont work, I'm afraid to kill docker-proxy, what if it takes down casaos? Any expert please help
$ sudo netstat -tulpn | grep ":53 "
tcp 0 0 0.0.0.0:53 0.0.0.0:* LISTEN 1152/docker-proxy
tcp6 0 0 :::53 :::* LISTEN 1166/docker-proxy
udp 0 0 0.0.0.0:53 0.0.0.0:* 1182/docker-proxy
udp6 0 0 :::53 :::* 1198/docker-proxy
can confirm it will kill casaos and your wifi in general, if you happen to make the same mistake use this, Run (resolvectl status) (or systemd-resolve --status in older versions of systemd). The output should look like this:
you are running AdGuard Home via Docker and it is, in fact, directly exposing port 53 (TCP and UDP) for all interfaces (0.0.0.0 and ::), so the docker-proxy process appears to be occupying that port.
This is normal and safe in this case, as it is AdGuard Home that is using port 53 through Docker.
I can't deactivate the port, it gives me this error when launching the last command
ash-4.4# sudo systemctl stop systemd-resolved.service
Failed to stop systemd-resolved.service: Unit systemd-resolved.service not loaded. ¿?