[Serusers] Re: RESOLVED - nathelper / calling UAs behind symmetric NATs

[Thilo Salmon]

The UA in question is indeed a Grandstream phone and I have not seen any
others showing this behaviour. On a quest for such agents you can
probably skip any agents without STUN support, I guess. Afaik, that does
not leave you with too many options. I personally only know about
Grandstream, X-ten and Snom. If you know others, I would be very
interesting to learn which ones.

On a side: A good start would also to avoid symmetric NATs. I would love
to compile a list of routers which operate symmetric NATs to tell my
customers to avoid them. I tried a number of residential routers, but
all of them did some sort of coned NAT. Who could name symmetric NATs?

Thilo

On Mon, 2003-12-29 at 18:22, Andres wrote:
> Looks quite useful.  It would probably work great with the Grandstream phones 
> since they do include a Header Field which will say if the NAT is Symmetric 
> or not.  
> 
> What other UA's are you using that include this header field?