Autoupdater and port forwarding

[Donar]

I'm having trouble with the autoupdater and my Linksys Wireless 54GS Router.

The autoupdater always tells me that it cannot connect to the remote host, so I think the autoupdater is firewalled (everything works fine if I connect my PC directly with my Modem). Problem is, that even turning off the firewall didn't help, so I was thinking about forwarding the ports the autoupdater needs to my pc.

Could anyone tell me which ports the autoupdater uses or is there another solution to this problem ?