@ifroen:
yes amule is about sharing and is doing so on port 4662. no problem with that.
however, amule is supposed to use certain ports (see above) to connect, so users can open these ports.
when i disable my firewall, amule opens other ports (at the moment 5998, 6346, 4332) and NOT 4665. this is strange behaviour in my opinion. and makes firewall configuration impossible.
@wuischke:
port 80 is also open (among some other ports for standard services)