No servers is showing up.

Hello, for not so long ago my friend bought Rust. I recomended it to him and he dicided to buy it.
I haven’t had any problems with it. But when he bought it and installed it no servers was showing up. We thought that the problem was that the firewall was bocking it but when he goes in it’s already unblocked. And it isen’t his network becouse he can see all servers on his Mac but that is lagging like hell and he would play on his desktop too.

althought it may be unblocked on his firewall just try turn it completely off

But if that works how can he fix it?

what firewall is he using ?

Just the windows Firewall i think.