Re: how exactly UDP tunneling works...
From: Alun Jones [MS MVP] (alun_at_texis.invalid)
Date: 03/08/04
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Date: Mon, 08 Mar 2004 23:07:59 GMT
In article <utKw31V$DHA.3536@tk2msftngp13.phx.gbl>, "Lord of the Ring"
<lordofthering@hotmail.com> wrote:
>Alun, thanks for the reply.... I've seen companies talking about carrying
>UDP over TCP which to me it means that you put a TCP stream in a UDP packet
>and send it......is this correct?? if so do you know of a technical material
>that you can refer me to???
"UDP over TCP" means that you are using an established TCP connection to
send UDP packets over. You are going to encapsulate the UDP packets in some
formatting data that allows the remote end to pick packets out of the TCP
stream. Use only in emergency, because it really changes the dynamic of the
UDP traffic.
Putting "a TCP stream in a UDP packet" is rather unlikely, unless it's a
really small stream. However, you could certainly encapsulate TCP over UDP,
in much the same way that TCP is already encapsulated over IP. This doesn't
significantly change the way that the protocol operates - but it does change
the size of your traffic, and does away with some of the optimisations that
the TCP / IP layers do for you.
I'm not aware of any specific implementations to recommend to you, but a few
good searches should find you something useful.
Alun.
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