Steam cmd server - connection failed after 4 retries error

im have steam cmd darkrp server my friend is can not join my server error : connection failed after 4 retries help me please

You need to port forward port 27015 if you aren’t hosting from a VPS or dedicated server.

im already port forwarded 27015

HELP ME

[editline]9th March 2015[/editline]

HELP

HELP PLEASE

You do realize that there’s literally hundreds of problems on your side that can cause this?

Port forwarding 27015 will not help you if your server runs on 27016 or if any number of firewall software blocks the connection.

Port forverded 27016
Firewall = OFF
Connection Failed After 4 Retries ???

HELP ME