[SR-Users] BLF issue with Kamailio behind NAT

Daniel-Constantin Mierla miconda at gmail.com
Mon Apr 28 10:26:11 CEST 2014


Hello,

the phone has to send SUBSCRIBE for blf, kamailio cannot do anything for 
that. Maybe the phone is misconfigured. Do you have any logs from the 
phone saying what it tries and what doesn't work?

Cheers,
Daniel

On 25/04/14 01:34, Errol Samuels wrote:
> Hello All,
>
> I have an integration with Kamailio and FusionPBX (Freeswitch) working 
> great but I been trying to troubleshoot a BLF issue with Kamailio 
> where the BLF seems to only work when Kamailio is on a Public IP 
> rather than behind NAT.  The BLF works fine when we register directly 
> with Freeswitch either on a Public IP or behind NAT.
>
> Both Kamailio and FusionPBX (Freeswitch) are behind pfSense firewall 
> on private IPs and registrations, Inbound and Outbound Calls etc are 
> working fine.  Just this BLF issue giving me some grief.  The phone in 
> question is a Yealink T20.
>
> I made some SIP Traces and I noticed the following:
>
> In the FS Message Header I see we have the SUBSCRIBE:
>
> ***** Begin Freeswitch trace****
>
> Frame 13: 619 bytes on wire (4952 bits), 619 bytes captured (4952 bits)
>
> Internet Protocol Version 4, Src: 192.168.1.138 (192.168.1.138), Dst: 
> 207.xx.xx.109 (207.xx.xx.109)
> User Datagram Protocol, Src Port: x11 (6062), Dst Port: ca-2 (5065)
> Session Initiation Protocol (REGISTER)
>     Request-Line: REGISTER sip:testfs.mydomain.com:5065 
> <http://testfs.mydomain.com:5065> SIP/2.0
>     Message Header
>         Via: SIP/2.0/UDP 192.168.1.138:6062;branch=z9hG4bK748715490
>         From: "302" <sip:302 at testfs.mydomain.com:5065 
> <http://sip:302@testfs.mydomain.com:5065>>;tag=530545144
>         To: "302" <sip:302 at testfs.mydomain.com:5065 
> <http://sip:302@testfs.mydomain.com:5065>>
>         Call-ID: 2118669441 at 192.168.1.138 
> <mailto:2118669441 at 192.168.1.138>
>         CSeq: 8 REGISTER
>         Contact: <sip:302 at 192.168.1.138:6062 
> <http://sip:302@192.168.1.138:6062>>
>         Allow: INVITE, INFO, PRACK, ACK, BYE, CANCEL, OPTIONS, NOTIFY, 
> REGISTER, SUBSCRIBE, REFER, PUBLISH, UPDATE, MESSAGE
>         Max-Forwards: 70
>         User-Agent: Yealink SIP-T20P 9.72.0.30
>         Expires: 300
>         Allow-Events: talk,hold,conference,refer,check-sync
>         Content-Length: 0
>
> Frame 14: 698 bytes on wire (5584 bits), 698 bytes captured (5584 bits)
>
> Internet Protocol Version 4, Src: 207.xx.xx.109 (207.xx.xx.109), Dst: 
> 192.168.1.138 (192.168.1.138)
> User Datagram Protocol, Src Port: ca-2 (5065), Dst Port: x11 (6062)
> Session Initiation Protocol (200)
>     Status-Line: SIP/2.0 200 OK
>     Message Header
>         Via: SIP/2.0/UDP 
> 192.168.1.138:6062;branch=z9hG4bK748715490;received=2.xx.xx.187;rport=6062
>         From: "302" <sip:302 at testfs.mydomain.com:5065 
> <http://sip:302@testfs.mydomain.com:5065>>;tag=530545144
>         To: "302" <sip:302 at testfs.mydomain.com:5065 
> <http://sip:302@testfs.mydomain.com:5065>>;tag=j71FeN5gcBjDe
>         Call-ID: 2118669441 at 192.168.1.138 
> <mailto:2118669441 at 192.168.1.138>
>         CSeq: 8 REGISTER
>         Contact: 
> <sip:302 at 192.168.1.138:6062;received=2.xx.xx.187:6062>;expires=300
>         Date: Thu, 24 Apr 2014 17:03:18 GMT
>         User-Agent: 
> FreeSWITCH-mod_sofia/1.2.23+git~20140419T040926Z~8a20da75ef~64bit
>         Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, 
> UPDATE, REGISTER, REFER, NOTIFY, PUBLISH, SUBSCRIBE
>         Supported: timer, path, replaces
>         Content-Length: 0
>
> Frame 15: 509 bytes on wire (4072 bits), 509 bytes captured (4072 bits)
>
> Internet Protocol Version 4, Src: 192.168.1.138 (192.168.1.138), Dst: 
> 10.22.110.9 (10.22.110.9)
> User Datagram Protocol, Src Port: x11 (6062), Dst Port: ca-2 (5065)
> Session Initiation Protocol (SUBSCRIBE)
>     Request-Line: SUBSCRIBE sip:301 at 10.22.110.9:5065 
> <http://sip:301@10.22.110.9:5065> SIP/2.0
>     Message Header
>         Via: SIP/2.0/UDP 192.168.1.138:6062;branch=z9hG4bK148600064
>         From: "302" <sip:302 at testfs.mydomain.com:5065 
> <http://sip:302@testfs.mydomain.com:5065>>;tag=2146254460
>         To: <sip:301 at testfs.mydomain.com:5065 
> <http://sip:301@testfs.mydomain.com:5065>>;tag=70uoBUVRvJyr
>         Call-ID: 168472766 at 192.168.1.138 <mailto:168472766 at 192.168.1.138>
>         CSeq: 2 SUBSCRIBE
>         Contact: <sip:302 at 192.168.1.138:6062 
> <http://sip:302@192.168.1.138:6062>>
>         Accept: application/dialog-info+xml
>         Max-Forwards: 70
>         User-Agent: Yealink SIP-T20P 9.72.0.30
>         Expires: 1800
>         Event: dialog
>         Content-Length: 0
>
> ****** End Freeswitch trace ********
>
> In the Kamailio Header there is no SUBSCRIBE for the BLF.
>
> ***** Begin Kamailio trace****
>
> Frame 17: 809 bytes on wire (6472 bits), 809 bytes captured (6472 bits)
>
> Internet Protocol Version 4, Src: 192.168.1.138 (192.168.1.138), Dst: 
> 207.xx.xx.108 (207.xx.xx.108)
> User Datagram Protocol, Src Port: x11 (6062), Dst Port: sip (5060)
> Session Initiation Protocol (REGISTER)
>     Request-Line: REGISTER sip:test.mydomain.com:5060 
> <http://test.mydomain.com:5060> SIP/2.0
>     Message Header
>         Via: SIP/2.0/UDP 192.168.1.138:6062;branch=z9hG4bK1572502835
>         From: "302" <sip:302 at test.mydomain.com 
> <mailto:sip%3A302 at test.mydomain.com>>;tag=1877226231
>         To: "302" <sip:302 at test.mydomain.com 
> <mailto:sip%3A302 at test.mydomain.com>>
>         Call-ID: 887242692 at 192.168.1.138 <mailto:887242692 at 192.168.1.138>
>         CSeq: 3 REGISTER
>         Contact: <sip:302 at 192.168.1.138:6062 
> <http://sip:302@192.168.1.138:6062>>
>         Authorization: Digest username="302", realm="test.mydomain.com 
> <http://test.mydomain.com>", nonce="U1lHHFNZRfB7/5Lyb/Rz3p/xu26B1lpE", 
> uri="sip:test.mydomain.com:5060 <http://test.mydomain.com:5060>", 
> response="7687c7d3141d1898e63a1cc9538f05d7", algorithm=MD5
>         Allow: INVITE, INFO, PRACK, ACK, BYE, CANCEL, OPTIONS, NOTIFY, 
> REGISTER, SUBSCRIBE, REFER, PUBLISH, UPDATE, MESSAGE
>         Max-Forwards: 70
>         User-Agent: Yealink SIP-T20P 9.72.0.30
>         Expires: 300
>         Allow-Events: talk,hold,conference,refer,check-sync
>         Content-Length: 0
>
> Frame 18: 496 bytes on wire (3968 bits), 496 bytes captured (3968 bits)
>
> Internet Protocol Version 4, Src: 207.xx.xx.108 (207.xx.xx.108), Dst: 
> 192.168.1.138 (192.168.1.138)
> User Datagram Protocol, Src Port: sip (5060), Dst Port: x11 (6062)
> Session Initiation Protocol (200)
>     Status-Line: SIP/2.0 200 OK
>     Message Header
>         Via: SIP/2.0/UDP 
> 192.168.1.138:6062;branch=z9hG4bK1572502835;rport=6062;received=2.xx.xx.187
>         From: "302" <sip:302 at test.mydomain.com 
> <mailto:sip%3A302 at test.mydomain.com>>;tag=1877226231
>         To: "302" <sip:302 at test.mydomain.com 
> <mailto:sip%3A302 at test.mydomain.com>>;tag=ff6b32c6b28b8954915484dd79f46b1c.fcdc
>         Call-ID: 887242692 at 192.168.1.138 <mailto:887242692 at 192.168.1.138>
>         CSeq: 3 REGISTER
>         Contact: <sip:302 at 192.168.1.138:6062 
> <http://sip:302@192.168.1.138:6062>>;expires=300;received="sip:2.xx.xx.187:6062"
>         Server: kamailio (4.0.6 (x86_64/linux))
>         Content-Length: 0
>
> Frame 19: 316 bytes on wire (2528 bits), 316 bytes captured (2528 bits)
>
> Internet Protocol Version 4, Src: 207.xx.xx.108 (207.xx.xx.108), Dst: 
> 192.168.1.138 (192.168.1.138)
> User Datagram Protocol, Src Port: sip (5060), Dst Port: x11 (6062)
> Session Initiation Protocol (OPTIONS)
>     Request-Line: OPTIONS sip:2.xx.xx.187:6062 SIP/2.0
>     Message Header
>         Via: SIP/2.0/UDP 10.22.110.11:5060;branch=0
>         From: sip:pinger at kamailio.org 
> <mailto:sip%3Apinger at kamailio.org>;tag=uloc-53579917-4e9-89-0b632cbb-a8aa99c
>         To: sip:2.xx.xx.187:6062
>         Call-ID: f9749d7-2d0b0be7-c678c54 at 10.22.110.11 
> <mailto:f9749d7-2d0b0be7-c678c54 at 10.22.110.11>
>         CSeq: 1 OPTIONS
>         Content-Length: 0
>
> ***** End Kamailio trace****
>
> Anyone faced this issue or have any ideas?
>
> regards,
>
> Errol
>
>
>
>
> _______________________________________________
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-- 
Daniel-Constantin Mierla - http://www.asipto.com
http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda

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