[Asterisk-Users] Asterisk Behind NAT

[Bill Seddon]

<<Alternatively, I'm open to any suggestions that would work>>
 
Like you I read about and NAT and the problems.  After a few days unsuccessful battling I gave up.  Instead of using SIP directly, we've taken SIP numbers with a VoIP service provider and receive calls using IAX from the VoIP provider.
 
I guess you could do the same yourself:  have an instance of Asterisk outside your firewall holding just SIP definitions and a simple dialplan to direct calls to and an Asterisk instance within a firewall using IAX that has a complete dialplan.  I'm sure the VoIP providers that offer SIP->IAX and IAX->SIP, such as the one we use, are doing more and that there are some gotchas.  But its an idea.
 
Bill Seddon

________________________________

From: asterisk-users-bounces at lists.digium.com on behalf of sammy ominsky
Sent: Mon 2/28/2005 9:03 PM
To: Asterisk Users
Subject: [Asterisk-Users] Asterisk Behind NAT



Hi all,

I've done quite a bit of reading, and I see that it's going to be
difficult, but as a last-ditch effort before implementing a suggestion
I don't like at all, I figured I'd ask...

Has anyone successfully put an asterisk box on an internal network
behind a NAT device and been able to connect with SIP from outside? 
The real point behind all this is to implement QoS for the voice
traffic, and putting a third box in front of the asterisk and NAT boxes
has been deemed "too expensive".

Currently, asterisk has a public IP, as does the NAT box behind which
all the office machines sit.  If it can be done, the NAT box would be
the best place to do the QoS, so why not ask, right?

Alternatively, I'm open to any suggestions that would work.  I've been
handed this challenge on my first day on a new job... :/

Thanks,

---sambo

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