[asterisk-users] Asterisk + Phones behind different Nat Firewalls

Carlos Alvarez carlos at televolve.com
Fri Apr 27 09:32:30 CDT 2012

On Fri, Apr 27, 2012 at 1:22 AM, Danny Dias <ing.diasdanny at gmail.com> wrote:

> Are you sure that works for you with the same environment as mine? Its
> just that im trying to understand it technically (sdp headers + sip
> headers) and i do not understand how the rtp will reach both phones on
> different nat sides

Here's one specific environment:

Asterisk > Sonicwall 240 (NAT) > ISP router (no NAT) > Internet > Airport
Extreme (NAT) > Linksys SPA 942

Works just fine.  We have dozens of similar implementations with other
routers, but never use junk routers or off-brand stuff on the server side.

Carlos Alvarez
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