how do I host my server and let ppl connect to it?

When I first started up my server (2 months cause of errors) Ive been having fun playing on it and my brother joins too on the downstairs computer. But I want other people to join it so I can have more fun (its non-legit gonna be fun) but problem is no one can connect they all say that there getting error 1017 which means in my LoginServer.ini has a local IP number in it so only I can loggin but no one else can, but when I type in my external IP address I get error 1017 so what should I type in, in that spot to make it work?