On Jun 17, 2010, at 12:59 PM, Maarten ter Huurne wrote: > Maybe it uses UPNP to tell the router which ports to open? > > As far as I know, there are no hole-punching techniques for TCP like > there > are for UDP. So the only way to get a port forward is to configure the > router, manually or through an API like UPNP.
Yes, many bittorrent clients use UPNP and/or NAT-PMP to open a hole in the firewall. This will work for most users of home routers, but not other NAT scenarios. I'm just waiting for the kernel patch which makes socket()/bind() automatically send a UPNP/NAT-PMP to the router to open the port. :) James _______________________________________________ Twisted-Python mailing list Twisted-Python@twistedmatrix.com http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-python
