asterisk users - Dec 2008 - Application Layer Gateway for SIP protocol

Hello everybody,

I want to know if Asterisk can provide any solution to perform NAT traversal for
SIP protocol which means that it implements the functions of an ALG (Application
Layer Gateway).

Thanks.



      
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Asterisk certainly supports NAT traversal, and is SIP-aware.

However, Asterisk is a user agent;  it can act as a SIP endpoint, not as 
an ALG.

Olfa Echi wrote:
> Hello everybody,
> 
> I want to know if Asterisk can provide any solution to perform NAT 
> traversal for SIP protocol which means that it implements the functions 
> of an ALG (Application Layer Gateway).
> 
> Thanks.
> 
> 
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Alex Balashov
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On Fri, Dec 19, 2008 at 2:56 AM, Olfa Echi <olfaechi at yahoo.fr>
wrote:
> Hello everybody,
>
> I want to know if Asterisk can provide any solution to perform NAT
traversal
> for SIP protocol which means that it implements the functions of an ALG
> (Application Layer Gateway).
>
> Thanks.
>
Look at the SIP connection tracking module for iptables/netfilter:

http://www.calivia.com/iptables-sip-conntrack-nat


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Kristian Kielhofner
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