[SR-Users] BYE issue

[Nelson Migliaro]

Hello everybody,

I am having issues with one SIP vendor.

I have a Kamailio in bridge mode (private IP / Public IP) and some Asterisk
and Media Gateways.

Calls get established and I have two way audio but when the remote party
hangs up the call, the BYE arrives to the Kamailio and does not move
forward.

I think the problem is SIP vendor rewrite the BYE header and change the
asterisk IP with the public IP of the kamailio.

The IP that appears in the header of the BYE have to be the same that
appears in the contact (UAC that send the call, in my case the Asterisk).
Vendor should not change that IP. ¿Am I correct?

Thank you

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INVITE
----------------------------------------------------------------------------------------------------
2016/10/17 18:50:49.110967 PUBLIC-KAMAILIO-IP:5060 -> VENDOR-IP:6060
INVITE sip:DESTINATION-NUMBER at VENDOR-IP:6060 SIP/2.0
Record-Route:
<sip:PUBLIC-KAMAILIO-IP;r2=on;lr=on;ftag=as5e87b96c;vsf=AAAAAAAAAAAAAAAAAABQUk9fRVYAU0UuODY-;vst=AAAAAAQEAw8MDgsAAHYAcVddXkZWRVVDVl1MMDIudm9pY2U
G9jYWw-;did=09b.9572;nat=yes>
Record-Route:
<sip:PRIVATE-KAMAILIO-IP;r2=on;lr=on;ftag=as5e87b96c;vsf=AAAAAAAAAAAAAAAAAABQUk9fRVYAU0UuODY-;vst=AAAAAAQEAw8MDgsAAHYAcVddXkZWRVVDVl1MMDIudm9pY2U
G9jYWw-;did=09b.9572;nat=yes>
Via: SIP/2.0/UDP
PUBLIC-KAMAILIO-IP;branch=z9hG4bK06a.07540d0e2f32a811ecf9c0a5235dc77a.1
Via: SIP/2.0/UDP
PRIVATE-ASTERISK-IP:5060;received=PRIVATE-ASTERISK-IP;branch=z9hG4bK6bb5a7b3;rport=5060
Max-Forwards: 69
From: "SOURCE-NUMBER" <sip:SOURCE-NUMBER at MY-COMPANY>;tag=as5e87b96c
To: <sip:DESTINATION-NUMBER at VENDOR-IP>
Contact: <sip:SOURCE-NUMBER at PRIVATE-ASTERISK-IP:5060>
Call-ID: 025cc3717ba59faa000cf4db6f8be588 at PRIVATE-ASTERISK-IP:5060
CSeq: 102 INVITE
User-Agent: UAC
Date: Mon, 17 Oct 2016 16:53:35 GMT
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO,
PUBLISH, MESSAGE
Supported: replaces, timer
Content-Type: application/sdp
Content-Length: 269

v=0
o=root 292850421 292850421 IN IP4 PUBLIC-KAMAILIO-IP
s=Asterisk PBX
c=IN IP4 PUBLIC-KAMAILIO-IP
t=0 0
m=audio 23456 RTP/AVP 18 101
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=ptime:20
a=sendrecv
a=nortpproxy:yes

-----------------------------------------------------------------------------------------------------
BYE
-----------------------------------------------------------------------------------------------------
2016/10/17 18:50:58.241666 VENDOR-IP:6060 -> PUBLIC-KAMAILIO-IP:5060
BYE sip:SOURCE-NUMBER at PUBLIC-KAMAILIO-IP:5060 SIP/2.0
Via: SIP/2.0/UDP VENDOR-IP:6060;branch=z9hG4bKeff4.48943e76.0
Via: SIP/2.0/UDP
VENDOR-IP:5060;branch=z9hG4bK1d4e605e4ll19f74fBYE421ce8658050206
Max-Forwards: 34
Route:
<sip:PUBLIC-KAMAILIO-IP;lr;r2=on;ftag=as5e87b96c;vsf=AAAAAAAAAAAAAAAAAABQUk9fRVYAU0UuODY-;vst=AAAAAAQEAw8MDgsAAHYAcVddXkZWRVVDVl1>
Route:
<sip:PRIVATE-KAMAILIO-IP;lr;r2=on;ftag=as5e87b96c;vsf=AAAAAAAAAAAAAAAAAABQUk9fRVYAU0UuODY-;vst=AAAAAAQEAw8MDgsAAHYAcVddXkZWRVVDVl1>
To: "SOURCE-NUMBER"<sip:SOURCE-NUMBER at YO>;tag=as5e87b96c
From: <sip:DESTINATION-NUMBER at PUBLIC-KAMAILIO-IP>;tag=421ce86-co1547-INS001
Call-ID: 025cc3717ba59faa000cf4db6f8be588 at PRIVATE-ASTERISK-IP:5060
CSeq: 154701 BYE
User-Agent: VENDOR
Content-Length: 0

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