I’ve got a listen server up and running, and I want some friends to connect with it. However, they don’t see my server anywhere. How do I let 'em connect?
You need to portforward
Already done that.
you need to do sv_lan 0 before starting the server
Also, have they tried connecting through the console?
^ give them that IP
And what solved my problem was to forward the ports on both my router and my modem.
Edit: Assuming that you also have a router