need help with hosting

I forwarded all my ports and sv_lan 0
and when my friends try to join my game it says server not responding.How do i fix this?

This happens with my brother 2, it might be a bugged addon, or just ur computer. either way, i don’t think you can fix it

Sure he’s connection to the right (whatismyip.org) IP?

he is, i could make one, but he couldn’t and he even has a better computer that me