Re: Reference STUN servers?

You are correct that this is not the behavior implied by the 
specification.

-Jonathan R.

Justin Uberti wrote:

> Hello,
> 
> I have been testing my STUN client library against the two public STUN 
> servers I know of, stun01.sipphone.com, and larry.gloo.net. However, I 
> am not getting the results I expect - when I send a binding request to 
> the server and get back a CHANGED-ADDRESS, and then send a second 
> binding request to the CHANGED-ADDRESS, the servers reply to the binding 
> request from a different port (i.e. not the one from the 
> CHANGED-ADDRESS). I am not setting any CHANGE-REQUEST flags.
> 
> ex:
> sending request to stun01.sipphone.com (69.0.208.27:3478)
> received reply from 609.0.208.27:3478
> source address = 69.0.208.27:3478
> changed address = 69.0.209.22:3479
> 
> sending request to 69.0.209.22:3479
> received reply from 69.0.209.22:3478 <----------- BAD
> source address = 69.0.209.22:3479
> changed address = 69.0.209.27:3478
> 
> I assume this is not the correct behavior, as it causes the NAT 
> detection flow proposed in the STUN RFC to detect port-restricted-cone 
> NATs as symmetric NATs. Does anyone know of any running 'reference' 
> servers that are known to behave correctly?
> 
> Thanks in advance,
> Justin Uberti
> 
> 
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> 

-- 
Jonathan D. Rosenberg, Ph.D.                600 Lanidex Plaza
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