[Kamailio-Users] Openser as Proxy and Asterisk as Registrar

[Cosimo Fadda]

Hi everybody
I'd like to implement this scenario:

-----------              -------------------              ---------------
|  GW/FW  
|<----LAN1---->|eth0|Openser|eth1|<----LAN2---->|eth0|asterisk| -->PSTN
-----------              -------------------       |      ---------------
       |_______________________________________________|            
                                                                        
                        


Where:
- Openser is reachable from the outside  with a public  IP forwarded to 
eth0 private address;

- Asterisk is connected to Openser using another separated LAN
- Openser acts as proxy (for requests coming from the  outside) and 
Asterisk act as registrar and gateway.


This is the description, now the questions:
-since opneser has two different nics, how can configure it to properly 
send register request to asterisk?
This is what currently happens:
192.168.40.68:5060: is eth0 Openser Address
192.168.12.165 is eth1 Openser Address
192.168.12.106  is Asterisk address
82.187.X.X is Openser public address
Network 192.168.40.X is not reachable from net 192.168.12.X

<-- SIP read from 192.168.40.68:5060:  REGISTER sip:192.168.12.106 
SIP/2.0   // 12.106 is Asterisk address
Via: SIP/2.0/UDP 82.187.X.X;branch=z9hG4bKfe0f.21364c47.0 Via: 
SIP/2.0/UDP 
192.168.40.254:2660;rport=2265;received=82.187.Y.Ybranch=z9hG4bK532058BAC7C544E0961E038CC29B2106 

From: Cfadda <sip:225 at 82.187.90.68>;tag=3189722840
To: Cfadda <sip:225 at 82.187.90.68>
Contact: "Cfadda" <sip:225 at 192.168.40.254:2660>
Call-ID: 487DA353295C484FA58B2FB1464A2210 at 82.187.X.X
CSeq: 65140 REGISTER
Expires: 1800
Max-Forwards: 69
User-Agent: X-PRO release 1105x
Content-Length: 0


Nov  5 10:37:28 VERBOSE[23848] logger.c: --- (12 headers 0 lines) ---
Nov  5 10:37:28 VERBOSE[23848] logger.c: Using latest REGISTER request 
as basis request
Nov  5 10:37:28 VERBOSE[23848] logger.c: Sending to 82.187.X.X : 5060 
(non-NAT)
Nov  5 10:37:28 VERBOSE[23848] logger.c: Transmitting (NAT) to 
192.168.40.68:5060:
SIP/2.0 100 Trying
Via: SIP/2.0/UDP 82.187.X.X 
;branch=z9hG4bKfe0f.21364c47.0;received=192.168.40.68
Via: SIP/2.0/UDP 
192.168.40.254:2660;rport=2265;received=82.187.Y.Y;branch=z9hG4bK532058BAC7C544E0961E038CC29B2106 

From: Cfadda <sip:225 at 82.187.90.68>;tag=3189722840
To: Cfadda <sip:225 at 82.187.X.X >
Call-ID: 487DA353295C484FA58B2FB1464A2210 at 82.187.X.X
CSeq: 65140 REGISTER
User-Agent: Asterisk PBX
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY
Contact: <sip:225 at 192.168.12.106>
Content-Length: 0


---
Nov  5 10:37:28 VERBOSE[23848] logger.c: Transmitting (NAT) to 
192.168.40.68:5060:
SIP/2.0 401 Unauthorized
Via: SIP/2.0/UDP 82.187.X.X 
;branch=z9hG4bKfe0f.21364c47.0;received=192.168.40.68
Via: SIP/2.0/UDP 
192.168.40.254:2660;rport=2265;received=82.187.Y.Y;branch=z9hG4bK532058BAC7C544E0961E038CC29B2106 

From: Cfadda <sip:225 at 82.187.X.X >;tag=3189722840
To: Cfadda <sip:225 at 82.187.X.X >;tag=as4c420a53
Call-ID: 487DA353295C484FA58B2FB1464A2210 at 82.187.X.X
CSeq: 65140 REGISTER
User-Agent: Asterisk PBX
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY
WWW-Authenticate: Digest algorithm=MD5, realm="asterisk", nonce="05f14a3e"
Content-Length: 0

So asterisk sends response to the wrong interface.

How can I solve this?

Thanks in advance,

C.