Thanks for the reply. A quick google search and I found one B2BUA from http://www.vovida.org/applications/downloads/b2bua/

Is there any other open source B2BUA for Linux/Unix platform?

Thanks,

Dhiraj

-----Original Message----- From: Jan Janak [mailto:jan@iptel.org] Sent: 17 October 2003 15:25 To: Bhuyan,D,Dhiraj,XVR3 R Cc: serusers@lists.iptel.org Subject: Re: [Serusers] Outbound Proxy

Hello,

no, it is not possible because you can't change To and From header fields in the message and also the gateway ser can't respond to digest challenge from the registrar because it doesn't know user's credentials. You will need a B2BUA for this kind of job.

Jan.

On 17-10 14:43, dhiraj.2.bhuyan@bt.com wrote:

Hello All,

Can anyone tell me whether the following setup can be achieved with SER?

[UA] <-------> [Gateway/NAT/SER Proxy] <--------> [SER Registrar]

1. The UA is behind a NAT gateway.
2. Whenever the SER Proxy on the NAT Gateway receives a registration request from a UA ( tester@gateway )on the private network, it sends a registration request ( tester@ser-registrar ) to the "SER Registrar" on behalf of the UA. This means the SER Proxy should be able to translate a SIP URI on the public side ( tester@ser-registrar ) to one on the private side ( tester@gateway ) and forward it to the right machine.

Any feedback will be greatly appreciated.

Regards,

Dhiraj Bhuyan Security Research Engineer BTexact

Tel: +44 1473 643932 Mob: +44 7753231984 Email: dhiraj.2.bhuyan@bt.com

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