Error starting userland proxy, apparently 443 is tied to something?

Hi All,

Newbie here trying to get a Traefik setup going, using this guide for instruction.

However, I keep running into this error when docker-compose up -d.

ERROR: for traefik  Cannot start service traefik: driver failed programming external connectivity on endpoint traefik (65381a852d4e8507c341068110cda679ac1b6d46258428a89ece62e25596ad64): Error starting userland proxy: listen tcp4 bind: address already in use
ERROR: Encountered errors while bringing up the project.

Listening on 443 to see what is on it, it looks like nginx even though I do not have any containers running this. My only guess is, this is something in Synology's back end but it's been difficult to find where this back end package is hiding, or if it even is safe to remove.

tcp        0      0   *               LISTEN      18439/nginx: worker 
tcp6       0      0 :::443                  :::*                    LISTEN      18439/nginx: worker 

Killing it just makes it respawn with a new ID number.

Has anyone had luck getting around this?

I'd appreciate any insight into this. I've pretty much exhausted all the so called fixes I found similar to this online and frankly just thankful I haven't broken anything trying all those fixes.