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How Skype Punches Holes in Firewalls

Posted by CmdrTaco on from the i-thought-it-used-a-hammer dept.

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."

2 of 215 comments (clear)

  1. Rugged, easy-to-clean plastic laminates by Anonymous Coward · · Score: -1, Offtopic

    each one is able to support more than 14 tons
    and you can really see how big it is
    and together they stretch for almost 1/4 mile
    2.5 times the height of mount everest (the highest point on earth)
    this super-imposed outline will give you an idea of its size
    it's 370 miles wide at the base
    and over 100 feet in length
    but that's 40 miles from the opposite rim
    and over 75,000 feet at the top
    and that figure increases every year
    Rugged, easy-to-clean plastic laminates are used on all the walls and surfaces
    and that figure increases every year
    the floors on which you are walking
    the floors the floors on which you are walking
    the floors the floors the floors on which you are walking
    the floors the floors the floors the floors on which you are walking
    children under 7 must be accompanied by an adult

  2. mod 04 by Anonymous Coward · · Score: -1, Offtopic

    of BSD/OS. ^A Hapless *BSD I've never seen