Open Source Sip: OpenSBC Two Nics Scenario ...

15 Replies Last post: Dec 3, 2009 2:18 AM by austincao 1 2 Previous Next

mapombo

7 posts since
Apr 8, 2009

Apr 8, 2009 9:50 AM

OpenSBC Two Nics Scenario

Hi,

I've been trying to setup OSBC on a server with two NICs, one for outside an the other for inside.

However, when receiving an INVITE from the outside, I can see via Wireshark the INVITE being sent correctly to the inside proxy through the inside NIC, but the source IP is the one from the outside NIC. How can I force the requests to inside to use the source IP belonging to the inside NIC?

Thanks a lot,

mapombo

joegen

539 posts since
Apr 28, 2007

1. Apr 13, 2009 10:32 PM

in response to: mapombo

Re: OpenSBC Two Nics Scenario

Two ways. If you are using linux, make sure that you configure opensisptack to use the gpl-libs
#./configure --enable-gpllibs
This should enable opensipstack to use the more reliable iproute2 library when choosing the correct interface.

If the above still doesn't work for you, check out the latest opensbc from CVS. I have recently added a new page in the admin called SIP-Transports.
Interface-Route-List parameter is what would be significant for you. I provided the comment below.

In case where OpenSBC acts as a bridge across multiple networks, it is vital for OpenSBC to use the correct interface which can route outbound packets to the target network. Although OpenSBC has quite a good way of determining this by maximizing the use of the actual OS route table, there are cases where the complexity or probably just misconfigured route tables may produce a wrong interface address. This list allows us to statically impose which interface OpenSBC would use for particular destinations. The entry here should be expressed in B2BUA-Route format using SIP-URI syntax. Example: [sip:10.0.1.*] sip:10.0.1.1 where sip:10.0.1.* is the target network and sip:10.0.1.1 is the interface to use to reach the network.

mapombo

7 posts since
Apr 8, 2009

2. Apr 14, 2009 11:56 AM

in response to: joegen

Re: OpenSBC Two Nics Scenario

joegen,

Thanks for the tip. I checked-out from CVS and compiled it using VS2008. It is using the correct IP now.

However, after receiving the invite from Outside, a 200 OK is sent including a record-route to the Internal IP, so the ACK is being sent by the remote client the the wrong address. OpenSBC keeps sending several 200 OK until it finally sends a BYE (because is is not getting any ACK back).

Do you have any idea on how to fix the RecordRoute IP?

Thanks,

Manuel Pombo

joegen

539 posts since
Apr 28, 2007

3. Apr 15, 2009 9:20 PM

in response to: mapombo

Re: OpenSBC Two Nics Scenario

Can you post the level five log of the call please together with your opensbc.ini

mapombo

7 posts since
Apr 8, 2009

4. Apr 16, 2009 11:25 AM

in response to: joegen

Re: OpenSBC Two Nics Scenario

Sure, here they are...

Attachments:

joegen

539 posts since
Apr 28, 2007

5. Apr 17, 2009 10:45 PM

in response to: mapombo

Re: OpenSBC Two Nics Scenario

Thanks for the logs. I can see the error you are talking about. I've patched the OpenSIPStack Library accordingly. Can you download the recent OpneSIPStack and recompile OpenSBC? Let me know how it goes.

mapombo

7 posts since
Apr 8, 2009

6. Apr 20, 2009 11:59 AM

in response to: joegen

Re: OpenSBC Two Nics Scenario

Joegen,

The new build solved this issue.

Thanks a lot!,

Manuel Pombo

mapombo

7 posts since
Apr 8, 2009

7. May 5, 2009 6:43 AM

in response to: mapombo

Re: OpenSBC Two Nics Scenario

Hi,

I'm still facing some issues after all: reinvites are not being properly handled. When OSBC receives an invite from Outside, it passes it to Inside placing it's inside IP in the Contact Header, without any Record Routes. However, when afterwads a reinvite is received from Inside, OSBC sends a 200OK changing the Contact Header to the outside IP and inserting a Record Route to the Inside IP.

As per RFC 3261 (12.2), requests within a dialog can not cause the route set to be changed.

Is there anything wrong with the ini file, or is it a bug?

Thanks,

Manuel Pombo

Attachments:

logs.rar (479.1 K)

joegen

539 posts since
Apr 28, 2007

8. May 6, 2009 10:30 PM

in response to: mapombo

Re: OpenSBC Two Nics Scenario

I agree about the record route. I will patch than one up soon. However, I couldnt replicate the contact problem here. In fact OpenSBC relays the contact of the callee in the 200 OK. Thats definitely a major screw up. Woul you be able to test with me real-time and place test calls to my test server? Let's a gree on a time and date. I am nomrally available 8 PM - 12 PM Eastern Standard Time.

mapombo

7 posts since
Apr 8, 2009

9. May 7, 2009 5:35 AM

in response to: joegen

Re: OpenSBC Two Nics Scenario

That's a little late for Portugal, Europe (1 AM - 5 AM). Can't you make it a little sooner in the day?

Also, can you replicate the reinvite scenario in your test server?

mapombo

7 posts since
Apr 8, 2009

10. May 28, 2009 12:37 PM

in response to: joegen

Re: OpenSBC Two Nics Scenario

Hi joegen,

Do you have any update on this issue?

Thanks,

Manuel Pombo

joegen

539 posts since
Apr 28, 2007

11. May 30, 2009 7:49 PM

in response to: mapombo

Re: OpenSBC Two Nics Scenario

I think this is already fixed in the latest CVS version. Could you test against that and report your findings?

dablackgreek

30 posts since
Jun 24, 2009

12. Jun 29, 2009 12:01 PM

in response to: joegen

Re: OpenSBC Two Nics Scenario

Anyone has a proper configuration for OSBC Two Nic.

Right now all external registrations give 408

Using OSBC v1.1.5-108

dablackgreek

30 posts since
Jun 24, 2009

13. Jun 29, 2009 12:49 PM

in response to: dablackgreek

Re: OpenSBC Two Nics Scenario

Ok one thing learned... In SIP Transports you have to list your Public Interface first to get it to register

dablackgreek

30 posts since
Jun 24, 2009

14. Jun 29, 2009 3:58 PM

in response to: dablackgreek

Re: OpenSBC Two Nics Scenario

Ok All. I finally got my OSBC with TWO NICS to Work

My working config is below...

Pay close attention you must declare your Interfaces in the SIP Transports and also look at the Route List in SIP Transports.

FYI: I am running OpenSBC in front of Asterisk

OpenSBC WAN IP: w.x.y.188
OpenSBC LAN IP: 192.168.1.150

Asterisk IP: 192.168.1.250

If you have questions i am actively on this board

[Solegy]
RTTS-Client-Address=192.168.1.150

[OpenSBC-General-Parameters]
SIP-Log-Level=5
PTRACE-Log-Level=1
Log-File-Prefix=opensbc
User-Agent-Name=SBC
SBC-Application-Mode=B2BUpperReg Mode
Interface-Address Array Size=0
Enable-Backdoor-Port=True
Enable-Trunk-Port=False
Enable-Calea-Port=False
Static-RTP-Media-Address=
RTP-Min-Port=30001
RTP-Max-Port=40000
Send-Responses-Using-New-Socket=True
Enable-Local-Refer=False
Max-Forwards=70
Encryption-Mode=XOR
Encryption-Key=GS
Transaction-Thread-Count=10
Session-Thread-Count=10
Alerting-Timeout=30000
Seize-Timeout=60000
SIP-Timer-B=Default
SIP-Timer-H=Default
Session-Keep-Alive=1800
Session-Max-Life-Span=10800
Max-Concurrent-Session=100
Max-Call-Rate-Per-Second=10
Interface-Address 1=sip:192.168.1.150:5060

[Upper-Registration]
All-Reg-As-Upper-Reg=True
Enable-Stateful-Reg=False
Rewrite-TO-Domain=True
Rewrite-FROM-Domain=True
Route-List Array Size=1
Route-List 1=[sip:*@sip.mydomain.net] sip:192.168.1.250;domain=sip.mydomain.com

[Internal-DNS-Mapping]
Internal-DNS-Map Array Size=0

[RTP-Proxy]
Proxy-On-Private-Contact=True
Proxy-On-via-received-vs-signaling-address=True
Proxy-On-Private-Via=True
Proxy-On-Different-RPORT=True
Proxy-All-Media=True

[Media-Server]
Enable-Media-Server=False
Media-Server-Number=5000
Codec-List Array Size=0
No-RTP-Proxy-On-All-Transfers=False
Enable-Announcement-Service=False
4xx-Error-Map=prompts/basic/cant_complete.wav
5xx-Error-Map=prompts/basic/cant_complete.wav
6xx-Error-Map=prompts/basic/cant_complete.wav
Announcement-Error-Map Array Size=0

[B2BUA-Routes]
Enable-Route-Scripting=False
Route-Script=b2bua-route.cscript
Route-List Array Size=1
Route-List 1=[sip:*@sip.mydomain.net] sip:192.168.1.250
Catch-All-Route=
Insert-Route-Header=True
Rewrite-TO-URI=True
Rewrite-From-Domain=
Prepend-ISUP-OLI=False
Route-By-Request-URI=True
Route-By-To-URI=False
Drop-Routes-On-Ping-Timeout=False
Use-External-XML=False
External-XML-File=b2bua-route.xml

[Local-Domain-Accounts]
Accept-All-Registration=True
Account-List Array Size=0

[Trusted-Domains]
Accept-All-Calls=True
Trusted-Domain-List Array Size=0

[Privacy-RFC-3325]
Default-Realm=
Trusted-Domain-List Array Size=0

[SIP-Transports]
Main-Interface-Address Array Size=2
Backdoor-Interface-Address=sip:*:5062
Trunk-Interface-Address=sip:*:5064
Media-Server-Interface-Address=sip:*:5066
CALEA-Interface-Address=sip:*:5068
Auxiliary-Interface-Address=sip:*:5070
Interface-Route-List Array Size=2
Interface-Route-List 1=[sip:192.168.1.*] sip:192.168.1.150
Main-Interface-Address 1=sip:192.168.1.150:5060
Main-Interface-Address 2=sip:w.x.y.188:5060
Interface-Route-List 2=[sip:w.x.y.*] sip:192.168.1.150;external=w.x.y.188

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Apr 8, 2009 9:50 AM

OpenSBC Two Nics Scenario

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