does anyone knows which tcp ports i have to open in my router/hardware firewall?

i have normaly blocked the range 20444 - 23114 tcp
if i do so i cannot connect to the server:-( if i open it there is no problem to connect
so which port or ports in the range between 20444 and 23114 tcp have to be open /forwarded?

it would also be nice to find in general the info which ports bb2 uses on the homepage or on an technical support page! 🙂