From: "David P. Reed" <[EMAIL PROTECTED]>
Subject: RE: Network Address Translation harmful to RTP
Thanks for your response. Actually, there's no theoretical reason why NAT
will always be needed, but it is a reality today in the marketplace. I
don't want to get into the anti-NAT argument, however - I've flapped my
jaws enough on that already.
The practical problem is that the current NAT vendors that are used by me
and many other cable modem owners in MediaOne/RoadRunner land do not handle
RTP properly, especially its needs for (2n, 2n+1) odd/even UDP socket
pairings, etc. [RTP is, I think, the only IP protocol with such a weird
design choice - not an illegal design, but unnecessarily different].
I want a NAT that does work for RTP today in either a Windows 98 or an NT
2000 host. Know of any that do? (I could even live with a Linux one, if I
really had to) The firewall products don't do NAT, and I don't think the
proxies work over NAT either.
At 02:54 PM 10/20/99 -0700, you wrote:
>From: "Andrew Gilbert" <[EMAIL PROTECTED]>
>Subject: RE: Network Address Translation harmful to RTP
>
>At some level NAT will always be needed, whether you are doing it on your
>side or the ISP is doing it on their side. There just aren't that many IP
>addresses to go around.
>
>There are proxies available from both Real and Apple. These could
>theoretically help address the problem. The NAT/Firewall side can address
>the issue with payload modification, just that the implementations are
>behind.
>
>Personally I would prefer protocols that didn't embed IP addresses. Bad
>assumption in today's world.
>
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