asterisk users - Aug 2005 - Nat + Asterisk + Ser (Far end Nat Traversal)

Hello,
 
I have several * servers behind a SER server (in a local ip range). The
SER server is also publicy reachable. On the other site, I have SIP
clients that are behind another NAT or in the same NAT range as the *
server. Can someone give me some directions/hints etc. on how to make
this work. I think I should be using MediaProxy with SER. But do the SIP
clients need to register at the SER server? If not, how will the reach
the * server, since they're only reachable VIA the SER router.
 
Here's is scheme:
 
 
 
   -----                                                      IP Phone A
(Behind NAT router) (ext 100, Asterisk A)
   - *A-----|        priv. addr   publ. addr                 |
   -----    |               -------         INTERNET         |
            ----------------- SER ---------------------------|
   -----    |               -------                          |
   - *B-----|                                                 IP Phone B
(Behind NAT router) (ext. 100, Asterisk B)
   -----
 
 (Asterisk servers)
 (10.254.254.x)   
 
 
Phone A can belong to Asterisk A, and B to Asterisk B. 
 
Hope this give you enough information.
 
Regards,
 
Ronald Voermans
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Chris,
 
Thank you for your answer. By the way, my * server won't be a PSTN
gateway. The SER is connected to another SIP gateway provided by our
Telco. Would you be so kind to give me some more details on this:
 
- Say I have * server A with extensions 100, 101, 102, and * server B
also with extensions starting from 100, .... (Server A is for another
company as Server B)
 
How can I make these phones register themselves with SER. Or do I need a
unique username for each extension (say username: companyA100, ... and
username companyB100)
How will I forward all the calls to a * server. So how do I forward the
calls from companyA100 to * server A etc...
Do the * servers need to be registered at the SER server?
 
Can you please provide me with some example configs (both on the SER as
on the * side? I cannot find to many examples on this one (besides the
'Asterisk at large'-WIKI)...
 
Thank you very much,
 
Ronald Voermans
 


________________________________

Van: asterisk-users-bounces@lists.digium.com
[mailto:asterisk-users-bounces@lists.digium.com] Namens Chris HARIGA
Verzonden: maandag 22 augustus 2005 15:10
Aan: 'Asterisk Users Mailing List - Non-Commercial Discussion'
Onderwerp: RE: [Asterisk-Users] Nat + Asterisk + Ser (Far end Nat
Traversal)


Hi,
 
all your phones need to be register with SER. The asterisk will be just
PSTN gateway, voicemail server or something else (I prefer to forward
all the calls from ser to asterisk because it's easy to manage the
dialplan). I have the same configuration, I balance the traffic with SER
and I use realtime with asterisk servers.
 
Best regards,
 
Chris HARIGA

 
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