How Skype Punches Holes in Firewalls

From, Slashdot: 12/15/2006

An anonymous reader writes "Ever wondered, how P2P software like Skype directly exchanges data — despite the fact, that both machines are sitting behind a firewall that only permits outgoing traffic? Read about the hole punching techniques, that make a firewall admin's nightmares come true."

They link to an article:
http://www.heise-security.co.uk/articles/82481


This is almost identical to what I am saying in my paper dated 6/3/2002
http://www.ecip.com/fwdoc.htm

This was a technique I pioneered, we had it in our one of our livecam video streaming products back in 1997.

Now Skype is using it.