Raspberry Pi IRC server

Nice tutorial on setting up an IRC server if you know nothing about IRC servers (or almost nothing)
via Raspberry Pi IRC Server.

Next challenge is to open up a port on the router, so the IRC server becomes reachable from the outside world.

I’m following this tutorial, with no success so far

I’m using this to see which ports are open/close

And now I’m off to read https://en.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbers to try and figure out what’s not working.

UPDATE: After realizing that there was a checkbox to check on my router’s interface, I can now say my IRC server test is functional!