Yep, same here. I'm running RH 7.2 and had a high security
firewall (block all access) setup then I changed that to
medium (block just certain ranges) and finally turned off
the firewall but never anyone uploads from me. I don't
know if I even need a firewall when I haven't got inetd
installed (I suppose for xfs I need it to block 7100 etc.)
Thing is I also have Gnotella for Windoze and with it
people do upload from me at times. No firewall there.
(I'm not sure I use Wincrap often enough to make it worth
installing one)