I am trying to set up a Docker lab to work on my computer science degree.

I have been searching all over this site, Google and Duck Duck Go for 2 weeks. I have called my ISP (they assured me that they are not blocking port 80). I have deleted and reinstalled my Linux OS and the docker service more times than I can count. I have rebooted my modem and Decos' before and after making changes.

I can not get port 80 to open. Some of the apps I need to master will only listen on port 80. I have tried to get them to work on alternative ports to no avail. I can't see any other way to achieve this, short of replacing my entire network infrastructure. Any advice or help would be greatly appreciated.