[opensuse] proftp passive mode, on which port?

i always have bad experience with my proftp server. i have it running but i can't transfr any data. Everytime it always stuck at "Entering passive mode" for a long time and then timeout. But if I disable the firewall, it works well. So which port of firewall should i open? I do some googling and find out port 30000-30050 or 60000-65535, but it didn't work. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org