Problem with inbound connections

["David Thomas" <biscut ntlworld com>]

Not too sure if this is the right list for this question but I will ask
anyway and see what response I get...

Both myself and my partner use Napster to download Mp3's and we can also
download Mp3's fine, however, it would seem that no one can connect to
either of us to download Mp3's off of our machines, we are using Redhat 6.1
as a Gateway and also using a hub so that can both connect at the same time,
is there a configuration change that I can make on the Linux machine to
allow people to connect to us or is this problem caused because IP Chains is
working correctly ?? Don't get me wrong, if IP Chains is causing this to
happen then its fine...I was just wondering if there is a small change that
can be made to allow us to get round this problem or not...

Regards
biscut