Owen DeLong owen at delong.com
Sat Nov 1 17:43:42 UTC 2003

That probably means they are not using SIP, but, instead are using
either H.323 or some other proprietary ugliness.  That's unfortunate.

SIP has to include the IP address of the RTP destination in it's payload.
As such, you can't use SIP cleanly across NAT unless the NAT box knows
to proxy the SIP and edit the payload (very messy).

In any case, Vonage aside, lots of things that the average user will
eventually consider useful are broken by NAT and NAT is an unnecessary
ugliness in most places where it is used.

It should _NOT_ be encouraged.


--On Saturday, November 1, 2003 11:33 AM -0600 Shawn Morris 
<shawn at smorris.com> wrote:

> Owen DeLong wrote:
>> If you are telling me that Joe User will never use VOIP, then you are
>> somking from a different internet hooka than the folks at Vonage.  I
>> don't know which of you is right, but, I know Vonage has enough
>> customers to say that at least some number of Joe User's are using SIP
>> and RTP which are among the protocols broken by NAT.  Next?
> Vonage's SIP implementation is not broken by NAT and in fact Vonage
> recommends that you purchase a SOHO router that does NAT.
>> Owen

If it wasn't signed, it probably didn't come from me.
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