Re: [p2p-hackers] Skype, TCP, and UDP

Lemon Obrien Tue, 11 Jul 2006 21:04:14 -0700

with udp you have to add extra parameters to navigate through the peer network; with tcp you get a direct connection at the native interface, and only has to send raw data.

The cipher stream can be simulates with udp b/c the data always needs to be re-assembled inorder on the other end.

David Barrett <[EMAIL PROTECTED]> wrote:

Why would TCP be faster than UDP over a LAN for VoIP traffic?

I cant think why Skype would do that, unless maybe to use a stream cipher for better encryption?

From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Lemon Obrien
Sent: Tuesday, July 11, 2006 7:33 PM
To: theory and practice of decentralized computer networks
Subject: Re: [p2p-hackers] UDP NAT Hole Punching Question

speed.

Carlos Alberto Kamienski <[EMAIL PROTECTED]> wrote:

> I have studied Skype for this effect, and I have seen that it isnt
> working with UDP (in my NAT environment atleast), all TCP
> communications, on port 80 and 443. I am new and bewildered. I need
> some direction, as how to progress, in writing a simple p2p
> communication over NAT.

We've been working with Skype and found out that in the newest versions,
when both peers are behind the same NAT (i.e., probably in the same LAN),
it uses TCP and not UDP. I was wondering if anyone could tell me why this
was changed.

Carlos

>
> sorry for the dumb post, if it sounds like one, I am absolutely a
> newbie in this field.
> regards
>

--
-------------------------
Carlos Alberto Kamienski
[EMAIL PROTECTED]
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Lemon Obrien, the Third.
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Re: [p2p-hackers] Skype, TCP, and UDP

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