[Twisted-Python] Punching a firewall with Twisted?

James Y Knight foom at fuhm.net
Thu Jun 17 14:35:08 EDT 2010

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  

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. :)


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