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

[Arnd Vehling]

Hi,

> > 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. 

Yupp, i thought about that too.

> I tried a number of residential routers, but
> > all of them did some sort of coned NAT. Who could name symmetric NATs?
> Linux NAT is symmetric and is quite common with small businesses.  We use the
> RTPProxy in these cases.

freeBSD is per default symetric too. There is a small patch though which makes
it into a full cone NAT.
 
We have currently cisco ATA's 186 and the grandstream working with the 
current CVS release and the NAT support/RTP Proxy.

Great software btw!

regards,

  Arnd