Hi to all!
I've a big problem with SER & Asterisk
I've a network where i put them working together.
Asterisk is the media gateway with PSTN as well as being the server which is making all the services available (IVR, voicemail, conference calls, etc).
SER just routes calls either to the softphones, VoIP phones or to Asterisk who will just forward the calls to PSTN (via Asterisk).
Till now everything works well except the service IVR which is working on Asterisk.

Details:
192.168.226.13 - IP SER
192.168.226.45 - IP Asterisk

The problem is only after the user (roberto@192.168.226.13 - authenticated and authorized in RADIUS) calls IVR.
Till then the user calls, IVR gives some information to the user and everything goes well.
Problem is when he presses a number which will have to redirect the call to another user.
And why is there a problem.
Because the initially roberto@192.168.226.13 to be able to call IVR had to rewrite host & port 192.168.226.45 so that the call would reach Asterisk who would then call to the IVR.
That rewriting turned roberto@192.168.226.13 into roberto@192.168.226.45. That is, I can say, that it became a "new user".
While it's on the IVR there's no problem, but when call is diverted it has to give its credentials...
Credentials that don't exist in RADIUS cause it only accepts usernames that end in @ 192.168.226.13 (IP of SER)

Here is the following code, both of extensions file in Asterisk and configure file of SER
I hope somebody knows how to solve it or at least find a way how to.

extensions.conf - Asterisk

[sip]
exten => 74001,1,Answer
exten => 74001,2,SetMusicOnHold(default)
exten => 74001,3,Set(TIMEOUT(digit)=5)
exten => 74001,4,Set(TIMEOUT(response)=10)
exten => 74001,5,Background(menu)

exten => 1,1,Dial(SIP/roberto@192.168.226.13:5060,,r)
...
exten => 7,1,Goto(sip,74001,1)
exten => 8,1,Hangup

ser.cfg - SER

...
if ((uri=~"^sip:7[0-9]{4}@.*")) {
        route(5);
        break;
};
...
route[5] {     # Redirecting to Asterisk
    # MsgLog
    xlog("L_ALERT","(WARNING) Sending to Asterisk request of %fu to %tu\n");
    rewritehostport("192.168.226.45:5060");
    route(1);
}

Thanks for your help,
Roberto Lopes