For Honor NAT Type UNKNOWN FIX -No Router-[PC]

I'm sorry I was typing in the text document since I was not confident to speak in English. I read the fixes on the internet but it requires you to log into your router. Sadly, I don't know my routers admin pass and username. So I tried figuring it out how to open a port by using Windows Firewall. When I saw Dota's port, I thought it was possible for For Honour.