IPv6 NAT

Sat Nov 1 17:56:58 UTC 2003

Owen DeLong wrote:

> 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).

Well, VOIP is not my area of expertise, but Vonage is using SIP and we 
have some of our engineers who are using our internal VOIP/SIP network 
behind a NAT device.

> 
> 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.
> 
> Owen
> 
> 
> --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
>>>
>>
> 
> 
> 