Dedicated server

Ok just recently like 2 hours ago i got a dedicated server so me and one of my freinds could play privatly and do what ever the hell we wanted… but iv got one problem he cant connect but i can… anyone got any suggestions. it would be a great help.

Dedicated like a VPS?

sv_lan 0
heartbeat 1

If you’re hosting yourself, Make sure you have open ports

I was wondering if they bought a box from some Dedi provider.

ok Im am mega lost. i am a noob. let me get that out of the way and can some one send me to a website that has step by step instructions so i can play a private game of gmod with a freind…!!!