Not sure about the distro being used, opensuse makes a docker zone to put docker interfaces on, those have their own ports and rules separate then the Ethernet assigned zone ports/services to allow. For me I had the opposite issue, I couldn’t reach my docker containers from my lan, onky from the local machine because the Ethernet was on an internal zone and Docker was on its own zone. I’m not a superskilled networker dude so I just turned on forwarding and masquerade so the incoming LAN zone would forward to doocker zone and pretend to be the local machine connecting and not a LAN or remote IP. I guess if you moved your dockers too the public zone you could get in trouble