Server hosting help

i have a server and im not shure if it is online and i dont know if slayers installer forwarded my ports or not. the server is on the lan and i have ulx almost set up. how can i tell if its offical?

Slayer’s Installer or any other installer will not forward your ports. You need to do them manually.

I checked port 27015 and 27005 and it told me that they were unavalable