Bitcoin has only 8 active connections, and I read somewhere that it helps to forward ports. I know how to forward a port, but which port should I forward, and how should I tell Bitcoin-qt to use the forwarded port?
Bitcoin has only 8 active connections
Correction: it has 8 outbound connections. By default, it can also accept up to 117 inbound connections
Port 8333, TCP
how should I tell Bitcoin-qt to use the forwarded port?
Don't need to.