[Kamailio-Users] Fwd: Openser as Proxy and Asterisk as Registrar - sr-users

6 Nov 2008

Hi David,
thank you for you answer,

2008/11/6, ingdavidcespedes(a)cable.net.co &lt;ingdavidcespedes(a)cable.net.co&gt;co>:
...

 Hi!

 I had the same problem (My PC was responding everything it receives through
 the default gateway "eth0"  ). Everybody say that it was an Asterisk bug,
 but it was a problem in the routing table. 

Yes, I'm new to Openser but I know quite well Asterisk, and I don't think it
is a bug or  a misconfiguration .

Type route in a terminal and check if they are the way you are thinking. If
...
  not, add the correct route. Tell me if it solve your
problem. 

The route table is correct, but a strange thing happens since  the SIP
packet is sent from the correct nic, but un the UDP header of that packet I
see as source the IP of the other nic (the one that received the orinal
packet)

I have to investigate a little more on this aspect anyway.

C.

David Cespedes
...

 ----- Mensaje original -----
 De: Cosimo Fadda &lt;cfadda.lists(a)gmail.com&gt;
 Fecha: Miércoles, Noviembre 5, 2008 9:36 am
 Asunto: [Kamailio-Users] Openser as Proxy and Asterisk as Registrar

  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@82.187.90.68 &lt;sip%3A225(a)82.187.90.68&gt;
;tag=3189722840
 To: Cfadda <sip:225@82.187.90.68 &lt;sip%3A225(a)82.187.90.68&gt;&gt;
 Contact: "Cfadda" <sip:225@192.168.40.254:2660>
 Call-ID: 487DA353295C484FA58B2FB1464A2210(a)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@82.187.90.68 &lt;sip%3A225(a)82.187.90.68&gt;
;tag=3189722840
 To: Cfadda <sip:225@82.187.X.X >
 Call-ID: 487DA353295C484FA58B2FB1464A2210(a)82.187.X.X
 CSeq: 65140 REGISTER
 User-Agent: Asterisk PBX
 Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY
 Contact: <sip:225@192.168.12.106 &lt;sip%3A225(a)192.168.12.106&gt;&gt;
 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@82.187.X.X >;tag=3189722840
 To: Cfadda <sip:225@82.187.X.X >;tag=as4c420a53
 Call-ID: 487DA353295C484FA58B2FB1464A2210(a)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.

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