How Skype Punches Holes in Firewalls

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."

DS

[an7ron]

I wish my nintendo DS did this, so I could play metroid at work.

Ever wondered

[spun]

Ever wondered, how to use, commas properly?

Re:DS

[MyLongNickName]

I wish my nintendo DS did this, so I could play metroid at work.

And if you could disguise it to look like a cash register, your customers would have no idea you weren't ringing up their Happy Meal.

Re:Ever wondered

[Anonymous Coward]

No [cpan.org], not [crasseux.com] really [wikipedia.org].

Re:Ever wondered

[CODiNE]

Don't tease, those, who have graduated, from the Shatner, School of Grammar.

How Skype & Co. get round firewalls

[jctull]

I always thought of firewalls as being some variation of a rectangle myself, so getting round firewalls would seem to make them easier to circumvent. But if the holes they are punching are round, wouldn't the round firewalls just plug the holes?

Re:Great article

[Opie812]

+4 Insightful? How about "-1 RTFA, assface".