[64761] in North American Network Operators' Group
Re: IPv6 NAT
daemon@ATHENA.MIT.EDU (Owen DeLong)
Sat Nov 1 13:43:26 2003
Date: Sat, 01 Nov 2003 10:42:37 -0800
From: Owen DeLong <owen@delong.com>
To: Shawn Morris <shawn@smorris.com>
Cc: nanog@merit.edu
In-Reply-To: <3FA3F3EA.4000808@smorris.com>
Errors-To: owner-nanog-outgoing@merit.edu
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I think Paul Timmins covered it rather well.
Owen
--On Saturday, November 1, 2003 11:56 AM -0600 Shawn Morris=20
<shawn@smorris.com> wrote:
> 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@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
>>>>
>>>
>>
>>
>>
>
--=20
If it wasn't signed, it probably didn't come from me.
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