[Users] Proxy/Registrar and NAT

[Klaus Darilion]

Hi Alex!

Without having done this: You can configure the SIP proxies as load 
balancers too which distribute the load over all the proxy/registrars 
(including itself).

Another solution requires a new feature, which should be easily 
implemented: Openser already stores the socket on which the request was 
received. Then, during lookup, this socket will be forced with an 
implicit force_send_socket().

If either
  - the forced send socket is accessIble via a pseudo variable
  - during lookup() the socket info is exported as AVP

the request can be forwarded to the proxy which has the NAT binding.

regards
klaus

Alex Hermann wrote:
> Hello list members,
> 
> 
> I'd like to use multiple proxies/registrars in a SRV managed 
> failover/load-balancing situation. For NAT purposes I could use a couple of 
> dedicated load-balancers with path support to store the NAT enabled route in 
> the location table. The registrars have a shared location table on a database 
> server. This situation works, but....
> 
> Is there a possibility to skip the load-balancers? 
> 
> I want the proxy/registrar to store the NAT-route somehow in the location 
> table, so that when the contact needs to be contacted, the proxy can 
> determine if it can send the request itself, or it needs to forward it via 
> one of the other proxies (the one with which the contact has the NAT 
> relation).
> 
> I hope you understand the topology, otherwise I might need to create some 
> ascii-art.