[OpenSIPS-Users] [RFC] Distributed User Location

[Vlad Paiu]

Hello all,

We would like to get suggestions and help on the matter of distributing 
the user location information.
Extending the User Location with a built-in distributed support is not 
straight forward - it is not about simply sharing data - as it is really 
SIP dependent and network limited

While now, by using the OpenSIPS trunk, it is possible to just share the 
actual usrloc info ( by using the db_cachedb module and storing the 
information in a MongoDB cluster ), you can encounter real-life 
scenarios where just sharing the info is not enough, like :
     - NAT-ed clients, where only the initial server that received the 
Register has the pin-hole open, and thus is the only server that can 
relay traffic back to the respective client
     - the user has a SIP client that only accepts traffic from the 
server IP that it's currently registered against, and thus would reject 
direct traffic from other IPs ( due to security reasons )

We would like to implement a true general solution for this issue, and 
would appreciate your feedback on this. Also we'd appreciate if you 
could share the needs that you would have from such a distributed user 
location feature, and the scenarios that you would use such a feature in 
real-life setups.


Best Regards,

-- 
Vlad Paiu
OpenSIPS Developer
http://www.opensips-solutions.com