[asterisk-users] Remote Phone and Server Behind NAT

[Joshua Colp]

Chris Shipman wrote:
> I have an asterisk Server (2.1.17) behind NAT with a static IP and port 
> forwarding enabled.  The remote SIP phone is also behind NAT.    
>  
> I've gotten them to work except when I specify a secret.    When there 
> is a secret configured the phone can not authorize.     Has anyone 
> gotten this to work?
>  
>  
> Regards,
>  
>  
> Chris
> 

I've seen this happen with some SIP aware solutions. They try to fix up 
the headers with the public IP address and end up screwing up the 
authentication hash so that it doesn't match when computed on the other 
side. What is doing the NAT?

Joshua Colp
Software Developer
Digium, Inc.