connection problem

Hello, i have recently known about that program, that is really good, but i have an online problem, and i dont know whats is it. I installed the program and the same module in my house and in a friend’s house, and in his house work perfect, but in mine not, and i dont know what is the problem.I install the modulo of Game of Thrones in both, 1.31 version, and in my house i cant play online, because i have a problem whith it.

This is the text that it shows to me:

Can anyone help me¿???

Thank you

I would say: Port in the firewall is closed.
But I don’t know wich ports must be open.