[Tutorial] How to fix -Cannot log in or cant see Server

[dinasor]

hi

i make my gunz and it work on my comp

but it dosnt work in any more comp

i need help how to fix that plz

[SluggerMyers]

For some reason, the only port I can forward is 80. I go to canyouseeme.org and it cannot see the others I forwarded. Any ideas?