[Asterisk-Users] Sipura 2000 behind NAT issue, Vonage is working

[David Hajek]

>
>
>>I have installed Vovida STUN server and point Sipura to use it. But no 
>>luck, I still can't hear the other party. I've ended up with having 
>>Linksys to forward all ports to my Sipura (DMZ host) which works.
>>
>>What is interesting is that when I'm using Vonage service (Cisco ATA) it 
>>works just fine without touching the Linksys. How come they can get 
>>through it?
>>
>>Any hints?
>>    
>>
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>Do you have the NAT Enable and NAT keepalive set to "Yes" on the Sipura?
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>

Yes, I do. I have find out that Sipura works when I set it as DMZ host 
on the Linksys firewall. Why Vonage can work without any special settings?

-David
http://hajek.net/blog