Hello guys,

I'm following this guide: 
https://kb.asipto.com/asterisk:realtime:kamailio-4.0.x-asterisk-11.3.0-astdb

And I have the following schema:

 Phone A   ----->   Kamailio    ----->    Asterisk    ----->   Phone B 
(10.0.8.249)        (10.0.6.123)            (10.0.3.144) (10.0.13.23)

I think the flow it is like (because when UAC register to Asterisk, the 
contact points to Kamailio IP): 

1. Phone A --> Kamailio --> Asterisk 
2. Asterisk --> Kamailio --> Phone B

In attachment is the pcap of the call, kamailio config.

The problem is that I never receive ACK after 200 OK and call drops after 
30 seconds?

Kamailio version 5.1 and Asterisk version 15.1

Phones are grandstreams and also tested with microsip soft client and same 
results... Like "Phone A" never sends ACK back

I tried different approaches to change contact header in 200 OK, because 
is Asterisk IP. Disable NAT  handling. Different "nat_uac_test" flags, but 
still without success :(

Also tried with this NAT detection and manage routes (again without any 
success) - source 
https://github.com/sipwise/kamailio/blob/master/etc/kamailio.cfg

# Caller NAT detection
route[NATDETECT] {
#!ifdef WITH_NAT
        force_rport();
        if (nat_uac_test("19")) {
                if (is_method("REGISTER")) {
                        fix_nated_register();
                } else {
                        if(is_first_hop()) {
                                set_contact_alias();
                        }
                }
                setflag(FLT_NATS);
        }
#!endif
        return;
}

# RTPProxy control and signaling updates for NAT traversal
route[NATMANAGE] {
#!ifdef WITH_NAT
        if (is_request()) {
                if(has_totag()) {
                        if(check_route_param("nat=yes")) {
                                setbflag(FLB_NATB);
                        }
                }
        }
        if (!(isflagset(FLT_NATS) || isbflagset(FLB_NATB))) return;

        if(nat_uac_test("8")) {
                rtpproxy_manage("co");
        } else {
                rtpproxy_manage("cor");
        }

        if (is_request()) {
                if (!has_totag()) {
                        if(t_is_branch_route()) {
                                add_rr_param(";nat=yes");
                        }
                }
        }
        if (is_reply()) {
                if(isbflagset(FLB_NATB)) {
                        if(is_first_hop())
                                set_contact_alias();
                }
        }
#!endif
        return;
}




Thanks in advance





Denislav Raychev Tsonev  |  Integration and Infrastructure Engineer |  
Musala Soft JSC 
www.musala.com  |  t: +359 2 969 58 21   |  m: +359 878 270 965   |  f: 
+359 2 969 58 22 
World Trade Center, 36 Dragan Tsankov blvd., Sofia 1057, Bulgaria 







No.     Time                          Source                Destination         
  Protocol Length Info
      1 2018-09-27 08:14:27,743676    10.0.8.249            10.0.6.123          
  SIP/SDP  1156   Request: INVITE 
sip:71...@ving3-dev-kamailio.musala.com:5566;transport=tcp | 

INVITE sip:71...@ving3-dev-kamailio.musala.com:5566;transport=tcp SIP/2.0
    Message Header
        Via: SIP/2.0/TCP 
10.0.8.249:63823;branch=z9hG4bKPj1d99be979d18418f8b8fc26c413511af;alias
        Max-Forwards: 70
        From: 
<sip:61...@ving3-dev-kamailio.musala.com>;tag=fd1273f0373d4241be9fd59f55da6113
        To: <sip:71...@ving3-dev-kamailio.musala.com>
        Contact: <sip:61003@10.0.8.249:53505;transport=TCP;ob>
        Call-ID: fcf1a883ccea421d8d519ad26502f7d6
        CSeq: 2184 INVITE
        Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, INFO, SUBSCRIBE, 
NOTIFY, REFER, MESSAGE, OPTIONS
        Supported: replaces, 100rel, timer, norefersub
        Session-Expires: 1800
        Min-SE: 90
        User-Agent: MicroSIP/3.19.5
        Content-Type: application/sdp
        Content-Length:   402
    Message Body
        Session Description Protocol
            Session Description Protocol Version (v): 0
            Owner/Creator, Session Id (o): - 3747024866 3747024866 IN IP4 
10.0.8.249
            Session Name (s): pjmedia
            Bandwidth Information (b): AS:84
            Time Description, active time (t): 0 0
            Session Attribute (a): X-nat:0
            Media Description, name and address (m): audio 4034 RTP/AVP 9 8 0 
97 101
            Connection Information (c): IN IP4 10.0.8.249
            Bandwidth Information (b): TIAS:64000
            Media Attribute (a): rtcp:4035 IN IP4 10.0.8.249
            Media Attribute (a): sendrecv
            Media Attribute (a): rtpmap:9 G722/8000
            Media Attribute (a): rtpmap:8 PCMA/8000
            Media Attribute (a): rtpmap:0 PCMU/8000
            Media Attribute (a): rtpmap:97 iLBC/8000
            Media Attribute (a): fmtp:97 mode=30
            Media Attribute (a): rtpmap:101 telephone-event/8000
            Media Attribute (a): fmtp:101 0-16
            Media Attribute (a): ssrc:186069227 cname:0b1b2d645dc864d0

No.     Time                          Source                Destination         
  Protocol Length Info
      2 2018-09-27 08:14:27,744941    10.0.6.123            10.0.8.249          
  SIP      595    Status: 401 Unauthorized | 

SIP/2.0 401 Unauthorized
    Message Header
        Via: SIP/2.0/TCP 
10.0.8.249:63823;branch=z9hG4bKPj1d99be979d18418f8b8fc26c413511af;alias;rport=63823
        From: 
<sip:61...@ving3-dev-kamailio.musala.com>;tag=fd1273f0373d4241be9fd59f55da6113
        To: 
<sip:71...@ving3-dev-kamailio.musala.com>;tag=d9ada26916736fe87b7a3b5aac92b749.c10a
        Call-ID: fcf1a883ccea421d8d519ad26502f7d6
        CSeq: 2184 INVITE
        WWW-Authenticate: Digest realm="ving3-dev-kamailio.musala.com", 
nonce="W6xoX1usZzMh9DRW7IFbVqQWKgE4SsklPzdhYIA=", qop="auth", algorithm=MD5
        Server: VING
        Content-Length: 0

No.     Time                          Source                Destination         
  Protocol Length Info
      3 2018-09-27 08:14:27,745416    10.0.8.249            10.0.6.123          
  SIP      490    Request: ACK 
sip:71...@ving3-dev-kamailio.musala.com:5566;transport=tcp | 

ACK sip:71...@ving3-dev-kamailio.musala.com:5566;transport=tcp SIP/2.0
    Message Header
        Via: SIP/2.0/TCP 
10.0.8.249:63823;branch=z9hG4bKPj1d99be979d18418f8b8fc26c413511af;alias
        Max-Forwards: 70
        From: 
<sip:61...@ving3-dev-kamailio.musala.com>;tag=fd1273f0373d4241be9fd59f55da6113
        To: 
<sip:71...@ving3-dev-kamailio.musala.com>;tag=d9ada26916736fe87b7a3b5aac92b749.c10a
        Call-ID: fcf1a883ccea421d8d519ad26502f7d6
        CSeq: 2184 ACK
        Content-Length:  0

No.     Time                          Source                Destination         
  Protocol Length Info
      4 2018-09-27 08:14:27,745593    10.0.8.249            10.0.6.123          
  SIP/SDP  1477   Request: INVITE 
sip:71...@ving3-dev-kamailio.musala.com:5566;transport=tcp | 

INVITE sip:71...@ving3-dev-kamailio.musala.com:5566;transport=tcp SIP/2.0
    Message Header
        Via: SIP/2.0/TCP 
10.0.8.249:63823;branch=z9hG4bKPjdde1ae7c273d440f9fa5e53f0db5b90d;alias
        Max-Forwards: 70
        From: 
<sip:61...@ving3-dev-kamailio.musala.com>;tag=fd1273f0373d4241be9fd59f55da6113
        To: <sip:71...@ving3-dev-kamailio.musala.com>
        Contact: <sip:61003@10.0.8.249:53505;transport=TCP;ob>
        Call-ID: fcf1a883ccea421d8d519ad26502f7d6
        CSeq: 2185 INVITE
        Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, INFO, SUBSCRIBE, 
NOTIFY, REFER, MESSAGE, OPTIONS
        Supported: replaces, 100rel, timer, norefersub
        Session-Expires: 1800
        Min-SE: 90
        User-Agent: MicroSIP/3.19.5
         [truncated]Authorization: Digest username="61003", 
realm="ving3-dev-kamailio.musala.com", 
nonce="W6xoX1usZzMh9DRW7IFbVqQWKgE4SsklPzdhYIA=", 
uri="sip:71...@ving3-dev-kamailio.musala.com:5566;transport=tcp", 
response="1d9db21e7f2c01afded9d
        Content-Type: application/sdp
        Content-Length:   402
    Message Body
        Session Description Protocol
            Session Description Protocol Version (v): 0
            Owner/Creator, Session Id (o): - 3747024866 3747024866 IN IP4 
10.0.8.249
            Session Name (s): pjmedia
            Bandwidth Information (b): AS:84
            Time Description, active time (t): 0 0
            Session Attribute (a): X-nat:0
            Media Description, name and address (m): audio 4034 RTP/AVP 9 8 0 
97 101
            Connection Information (c): IN IP4 10.0.8.249
            Bandwidth Information (b): TIAS:64000
            Media Attribute (a): rtcp:4035 IN IP4 10.0.8.249
            Media Attribute (a): sendrecv
            Media Attribute (a): rtpmap:9 G722/8000
            Media Attribute (a): rtpmap:8 PCMA/8000
            Media Attribute (a): rtpmap:0 PCMU/8000
            Media Attribute (a): rtpmap:97 iLBC/8000
            Media Attribute (a): fmtp:97 mode=30
            Media Attribute (a): rtpmap:101 telephone-event/8000
            Media Attribute (a): fmtp:101 0-16
            Media Attribute (a): ssrc:186069227 cname:0b1b2d645dc864d0

No.     Time                          Source                Destination         
  Protocol Length Info
      5 2018-09-27 08:14:27,764427    10.0.6.123            10.0.8.249          
  SIP      438    Status: 100 trying -- your call is important to us | 

SIP/2.0 100 trying -- your call is important to us
    Message Header
        Via: SIP/2.0/TCP 
10.0.8.249:63823;branch=z9hG4bKPjdde1ae7c273d440f9fa5e53f0db5b90d;alias;rport=63823
        From: 
<sip:61...@ving3-dev-kamailio.musala.com>;tag=fd1273f0373d4241be9fd59f55da6113
        To: <sip:71...@ving3-dev-kamailio.musala.com>
        Call-ID: fcf1a883ccea421d8d519ad26502f7d6
        CSeq: 2185 INVITE
        Server: VING
        Content-Length: 0

No.     Time                          Source                Destination         
  Protocol Length Info
      6 2018-09-27 08:14:27,783742    10.0.6.123            10.0.3.144          
  SIP/SDP  1420   Request: INVITE 
sip:71...@ving3-dev-kamailio.musala.com:5566;transport=tcp | 

INVITE sip:71...@ving3-dev-kamailio.musala.com:5566;transport=tcp SIP/2.0
    Message Header
        Record-Route: 
<sip:10.0.6.123:5566;transport=tcp;lr=on;ftag=fd1273f0373d4241be9fd59f55da6113;nat=yes>
        Via: SIP/2.0/TCP 
10.0.6.123:5566;branch=z9hG4bK2d83.4d12cc34432001052415c4a2ffd521a2.0;i=2
        Via: SIP/2.0/TCP 
10.0.8.249:63823;rport=63823;branch=z9hG4bKPjdde1ae7c273d440f9fa5e53f0db5b90d;alias
        Max-Forwards: 69
        From: 
<sip:61...@ving3-dev-kamailio.musala.com>;tag=fd1273f0373d4241be9fd59f55da6113
        To: <sip:71...@ving3-dev-kamailio.musala.com>
        Contact: <sip:61003@10.0.8.249:63823;transport=TCP;ob>
        Call-ID: fcf1a883ccea421d8d519ad26502f7d6
        CSeq: 2185 INVITE
        Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, INFO, SUBSCRIBE, 
NOTIFY, REFER, MESSAGE, OPTIONS
        Supported: replaces, 100rel, timer, norefersub
        Session-Expires: 1800
        Min-SE: 90
        User-Agent: MicroSIP/3.19.5
        Content-Type: application/sdp
        Content-Length:   410
        P-hint: (3)passed thru branch_route
    Message Body
        Session Description Protocol
            Session Description Protocol Version (v): 0
            Owner/Creator, Session Id (o): - 3747024866 3747024866 IN IP4 
193.17.229.80
            Session Name (s): pjmedia
            Bandwidth Information (b): AS:84
            Time Description, active time (t): 0 0
            Session Attribute (a): X-nat:0
            Media Description, name and address (m): audio 50990 RTP/AVP 9 8 0 
97 101
            Connection Information (c): IN IP4 193.17.229.80
            Bandwidth Information (b): TIAS:64000
            Media Attribute (a): rtcp:50991
            Media Attribute (a): sendrecv
            Media Attribute (a): rtpmap:9 G722/8000
            Media Attribute (a): rtpmap:8 PCMA/8000
            Media Attribute (a): rtpmap:0 PCMU/8000
            Media Attribute (a): rtpmap:97 iLBC/8000
            Media Attribute (a): fmtp:97 mode=30
            Media Attribute (a): rtpmap:101 telephone-event/8000
            Media Attribute (a): fmtp:101 0-16
            Media Attribute (a): ssrc:186069227 cname:0b1b2d645dc864d0
            Media Attribute (a): nortpproxy:yes

No.     Time                          Source                Destination         
  Protocol Length Info
      7 2018-09-27 08:14:27,796623    10.0.3.144            10.0.6.123          
  SIP      659    Status: 100 Trying | 

SIP/2.0 100 Trying
    Message Header
        Via: SIP/2.0/TCP 
10.0.6.123:5566;rport=33506;received=10.0.6.123;branch=z9hG4bK2d83.4d12cc34432001052415c4a2ffd521a2.0;i=2
        Via: SIP/2.0/TCP 
10.0.8.249:63823;rport=63823;branch=z9hG4bKPjdde1ae7c273d440f9fa5e53f0db5b90d;alias
        Record-Route: 
<sip:10.0.6.123:33506;transport=TCP;lr;ftag=fd1273f0373d4241be9fd59f55da6113;nat=yes>
        Call-ID: fcf1a883ccea421d8d519ad26502f7d6
        From: 
<sip:61...@ving3-dev-kamailio.musala.com>;tag=fd1273f0373d4241be9fd59f55da6113
        To: <sip:71...@ving3-dev-kamailio.musala.com>
        CSeq: 2185 INVITE
        Server: Asterisk PBX 15.1.2
        Content-Length:  0

No.     Time                          Source                Destination         
  Protocol Length Info
      8 2018-09-27 08:14:27,817873    10.0.3.144            10.0.6.123          
  SIP/SDP  1444   Request: INVITE sip:71010@10.0.6.123:33506;transport=TCP | 

INVITE sip:71010@10.0.6.123:33506;transport=TCP SIP/2.0
    Message Header
        Via: SIP/2.0/TCP 
10.0.3.144:5566;rport;branch=z9hG4bKPjb2f6c5fa-af86-440d-aa56-5180ba9f11f1;alias
        From: <sip:10.0.3.144>;tag=8acfe81e-5406-4fdd-88cd-94be97032897
        To: <sip:71010@10.0.6.123>
        Contact: <sip:asterisk@10.0.3.144:5566;transport=TCP>
        Call-ID: f48cda08-7ddc-475a-bacb-e713cb869c3e
        CSeq: 24589 INVITE
        Allow: OPTIONS, SUBSCRIBE, NOTIFY, PUBLISH, INVITE, ACK, BYE, CANCEL, 
UPDATE, PRACK, REGISTER, MESSAGE, REFER
        Supported: 100rel, timer, replaces, norefersub
        Session-Expires: 1800
        Min-SE: 90
        Max-Forwards: 70
        User-Agent: Asterisk PBX 15.1.2
        Content-Type: application/sdp
        Content-Length:   706
    Message Body
        Session Description Protocol
            Session Description Protocol Version (v): 0
            Owner/Creator, Session Id (o): - 553593879 553593879 IN IP4 
10.0.3.144
            Session Name (s): Asterisk
            Connection Information (c): IN IP4 10.0.3.144
            Time Description, active time (t): 0 0
            Media Description, name and address (m): audio 17494 RTP/AVP 9 8 0 
97 101
            Media Attribute (a): ice-ufrag:0271e8d36e48c5751e044cbc1955a1c5
            Media Attribute (a): ice-pwd:7f5bb8fc3aebd31922bc900438d087f3
            Media Attribute (a): candidate:Hc98996dc 1 UDP 2130706431 
fe80::f47f:41ff:feb8:2dc8 17494 typ host
            Media Attribute (a): candidate:Ha000390 1 UDP 2130706431 10.0.3.144 
17494 typ host
            Media Attribute (a): candidate:Hc98996dc 2 UDP 2130706430 
fe80::f47f:41ff:feb8:2dc8 17495 typ host
            Media Attribute (a): candidate:Ha000390 2 UDP 2130706430 10.0.3.144 
17495 typ host
            Media Attribute (a): rtpmap:9 G722/8000
            Media Attribute (a): rtpmap:8 PCMA/8000
            Media Attribute (a): rtpmap:0 PCMU/8000
            Media Attribute (a): rtpmap:97 iLBC/8000
            Media Attribute (a): fmtp:97 mode=20
            Media Attribute (a): rtpmap:101 telephone-event/8000
            Media Attribute (a): fmtp:101 0-16
            Media Attribute (a): ptime:20
            Media Attribute (a): maxptime:150
            Media Attribute (a): sendrecv

No.     Time                          Source                Destination         
  Protocol Length Info
      9 2018-09-27 08:14:27,819100    10.0.6.123            10.0.3.144          
  SIP      437    Status: 100 trying -- your call is important to us | 

SIP/2.0 100 trying -- your call is important to us
    Message Header
        Via: SIP/2.0/TCP 
10.0.3.144:5566;rport=5566;branch=z9hG4bKPjb2f6c5fa-af86-440d-aa56-5180ba9f11f1;alias;received=10.0.3.144
        From: <sip:10.0.3.144>;tag=8acfe81e-5406-4fdd-88cd-94be97032897
        To: <sip:71010@10.0.6.123>
        Call-ID: f48cda08-7ddc-475a-bacb-e713cb869c3e
        CSeq: 24589 INVITE
        Server: VING
        Content-Length: 0

No.     Time                          Source                Destination         
  Protocol Length Info
     10 2018-09-27 08:14:27,883793    10.0.6.123            10.0.13.23          
  SIP/SDP  1728   Request: INVITE sip:71010@10.0.13.23:5060;transport=tcp | 

INVITE sip:71010@10.0.13.23:5060;transport=tcp SIP/2.0
    Message Header
        Record-Route: 
<sip:10.0.6.123:5566;transport=tcp;lr=on;ftag=8acfe81e-5406-4fdd-88cd-94be97032897;nat=yes>
        Via: SIP/2.0/TCP 
10.0.6.123:5566;branch=z9hG4bK7213.f3002b09662ea2ed11fec68e8340bb56.0;i=3
        Via: SIP/2.0/TCP 
10.0.3.144:5566;received=10.0.3.144;rport=5566;branch=z9hG4bKPjb2f6c5fa-af86-440d-aa56-5180ba9f11f1;alias
        From: <sip:10.0.3.144>;tag=8acfe81e-5406-4fdd-88cd-94be97032897
        To: <sip:71010@10.0.6.123>
        Contact: <sip:asterisk@10.0.3.144:5566;transport=TCP>
        Call-ID: f48cda08-7ddc-475a-bacb-e713cb869c3e
        CSeq: 24589 INVITE
        Allow: OPTIONS, SUBSCRIBE, NOTIFY, PUBLISH, INVITE, ACK, BYE, CANCEL, 
UPDATE, PRACK, REGISTER, MESSAGE, REFER
        Supported: 100rel, timer, replaces, norefersub
        Session-Expires: 1800
        Min-SE: 90
        Max-Forwards: 69
        User-Agent: Asterisk PBX 15.1.2
        Content-Type: application/sdp
        Content-Length:   730
        P-hint: (3)passed thru branch_route
    Message Body
        Session Description Protocol
            Session Description Protocol Version (v): 0
            Owner/Creator, Session Id (o): - 553593879 553593879 IN IP4 
193.17.229.80
            Session Name (s): Asterisk
            Connection Information (c): IN IP4 193.17.229.80
            Time Description, active time (t): 0 0
            Media Description, name and address (m): audio 50928 RTP/AVP 9 8 0 
97 101
            Media Attribute (a): ice-ufrag:0271e8d36e48c5751e044cbc1955a1c5
            Media Attribute (a): ice-pwd:7f5bb8fc3aebd31922bc900438d087f3
            Media Attribute (a): candidate:Hc98996dc 1 UDP 2130706431 
fe80::f47f:41ff:feb8:2dc8 17494 typ host
            Media Attribute (a): candidate:Ha000390 1 UDP 2130706431 10.0.3.144 
17494 typ host
            Media Attribute (a): candidate:Hc98996dc 2 UDP 2130706430 
fe80::f47f:41ff:feb8:2dc8 17495 typ host
            Media Attribute (a): candidate:Ha000390 2 UDP 2130706430 10.0.3.144 
17495 typ host
            Media Attribute (a): rtpmap:9 G722/8000
            Media Attribute (a): rtpmap:8 PCMA/8000
            Media Attribute (a): rtpmap:0 PCMU/8000
            Media Attribute (a): rtpmap:97 iLBC/8000
            Media Attribute (a): fmtp:97 mode=20
            Media Attribute (a): rtpmap:101 telephone-event/8000
            Media Attribute (a): fmtp:101 0-16
            Media Attribute (a): ptime:20
            Media Attribute (a): maxptime:150
            Media Attribute (a): sendrecv
            Media Attribute (a): nortpproxy:yes

No.     Time                          Source                Destination         
  Protocol Length Info
     11 2018-09-27 08:14:27,910483    10.0.13.23            10.0.6.123          
  SIP      651    Status: 100 Trying | 

SIP/2.0 100 Trying
    Message Header
        Via: SIP/2.0/TCP 
10.0.6.123:5566;branch=z9hG4bK7213.f3002b09662ea2ed11fec68e8340bb56.0;i=3
        Via: SIP/2.0/TCP 
10.0.3.144:5566;received=10.0.3.144;rport=5566;branch=z9hG4bKPjb2f6c5fa-af86-440d-aa56-5180ba9f11f1;alias
        From: <sip:10.0.3.144>;tag=8acfe81e-5406-4fdd-88cd-94be97032897
        To: <sip:71010@10.0.6.123>
        Call-ID: f48cda08-7ddc-475a-bacb-e713cb869c3e
        CSeq: 24589 INVITE
        Supported: replaces, path, timer
        User-Agent: Grandstream GXP1620 1.0.4.128
        Allow: INVITE, ACK, OPTIONS, CANCEL, BYE, SUBSCRIBE, NOTIFY, INFO, 
REFER, UPDATE, MESSAGE
        Content-Length: 0

No.     Time                          Source                Destination         
  Protocol Length Info
     12 2018-09-27 08:14:27,950979    10.0.13.23            10.0.6.123          
  SIP      851    Status: 180 Ringing | 

SIP/2.0 180 Ringing
    Message Header
        Via: SIP/2.0/TCP 
10.0.6.123:5566;branch=z9hG4bK7213.f3002b09662ea2ed11fec68e8340bb56.0;i=3
        Via: SIP/2.0/TCP 
10.0.3.144:5566;received=10.0.3.144;rport=5566;branch=z9hG4bKPjb2f6c5fa-af86-440d-aa56-5180ba9f11f1;alias
        Record-Route: 
<sip:10.0.6.123:5566;transport=tcp;lr=on;ftag=8acfe81e-5406-4fdd-88cd-94be97032897;nat=yes>
        From: <sip:10.0.3.144>;tag=8acfe81e-5406-4fdd-88cd-94be97032897
        To: <sip:71010@10.0.6.123>;tag=271292769
        Call-ID: f48cda08-7ddc-475a-bacb-e713cb869c3e
        CSeq: 24589 INVITE
        Contact: <sip:71010@10.0.13.23:5060;transport=tcp>
        Supported: replaces, path, timer
        User-Agent: Grandstream GXP1620 1.0.4.128
        Allow-Events: talk, hold
        Allow: INVITE, ACK, OPTIONS, CANCEL, BYE, SUBSCRIBE, NOTIFY, INFO, 
REFER, UPDATE, MESSAGE
        Content-Length: 0

No.     Time                          Source                Destination         
  Protocol Length Info
     13 2018-09-27 08:14:27,951605    10.0.6.123            10.0.3.144          
  SIP      799    Status: 180 Ringing | 

SIP/2.0 180 Ringing
    Message Header
        Via: SIP/2.0/TCP 
10.0.3.144:5566;received=10.0.3.144;rport=5566;branch=z9hG4bKPjb2f6c5fa-af86-440d-aa56-5180ba9f11f1;alias
        Record-Route: 
<sip:10.0.6.123:5566;transport=tcp;lr=on;ftag=8acfe81e-5406-4fdd-88cd-94be97032897;nat=yes>
        From: <sip:10.0.3.144>;tag=8acfe81e-5406-4fdd-88cd-94be97032897
        To: <sip:71010@10.0.6.123>;tag=271292769
        Call-ID: f48cda08-7ddc-475a-bacb-e713cb869c3e
        CSeq: 24589 INVITE
        Contact: <sip:71010@10.0.13.23:47790;transport=tcp>
        Supported: replaces, path, timer
        User-Agent: Grandstream GXP1620 1.0.4.128
        Allow-Events: talk, hold
        Allow: INVITE, ACK, OPTIONS, CANCEL, BYE, SUBSCRIBE, NOTIFY, INFO, 
REFER, UPDATE, MESSAGE
        Content-Length: 0
        P-hint: (3)passed thru onreplay_route

No.     Time                          Source                Destination         
  Protocol Length Info
     14 2018-09-27 08:14:27,956687    10.0.3.144            10.0.6.123          
  SIP      858    Status: 180 Ringing | 

SIP/2.0 180 Ringing
    Message Header
        Via: SIP/2.0/TCP 
10.0.6.123:5566;rport=33506;received=10.0.6.123;branch=z9hG4bK2d83.4d12cc34432001052415c4a2ffd521a2.0;i=2
        Via: SIP/2.0/TCP 
10.0.8.249:63823;rport=63823;branch=z9hG4bKPjdde1ae7c273d440f9fa5e53f0db5b90d;alias
        Record-Route: 
<sip:10.0.6.123:33506;transport=TCP;lr;ftag=fd1273f0373d4241be9fd59f55da6113;nat=yes>
        Call-ID: fcf1a883ccea421d8d519ad26502f7d6
        From: 
<sip:61...@ving3-dev-kamailio.musala.com>;tag=fd1273f0373d4241be9fd59f55da6113
        To: 
<sip:71...@ving3-dev-kamailio.musala.com>;tag=c58be9d7-5cfa-48dc-a29e-c85b2e008a2e
        CSeq: 2185 INVITE
        Server: Asterisk PBX 15.1.2
        Contact: <sip:10.0.3.144:5566;transport=TCP>
        Allow: OPTIONS, SUBSCRIBE, NOTIFY, PUBLISH, INVITE, ACK, BYE, CANCEL, 
UPDATE, PRACK, REGISTER, MESSAGE, REFER
        Content-Length:  0

No.     Time                          Source                Destination         
  Protocol Length Info
     15 2018-09-27 08:14:27,957079    10.0.6.123            10.0.8.249          
  SIP      761    Status: 180 Ringing | 

SIP/2.0 180 Ringing
    Message Header
        Via: SIP/2.0/TCP 
10.0.8.249:63823;rport=63823;branch=z9hG4bKPjdde1ae7c273d440f9fa5e53f0db5b90d;alias
        Record-Route: 
<sip:10.0.6.123:33506;transport=TCP;lr;ftag=fd1273f0373d4241be9fd59f55da6113;nat=yes>
        Call-ID: fcf1a883ccea421d8d519ad26502f7d6
        From: 
<sip:61...@ving3-dev-kamailio.musala.com>;tag=fd1273f0373d4241be9fd59f55da6113
        To: 
<sip:71...@ving3-dev-kamailio.musala.com>;tag=c58be9d7-5cfa-48dc-a29e-c85b2e008a2e
        CSeq: 2185 INVITE
        Server: Asterisk PBX 15.1.2
        Contact: <sip:10.0.3.144:5566;transport=TCP>
        Allow: OPTIONS, SUBSCRIBE, NOTIFY, PUBLISH, INVITE, ACK, BYE, CANCEL, 
UPDATE, PRACK, REGISTER, MESSAGE, REFER
        Content-Length:  0
        P-hint: (3)passed thru onreplay_route

No.     Time                          Source                Destination         
  Protocol Length Info
     16 2018-09-27 08:14:29,569114    10.0.13.23            10.0.6.123          
  SIP/SDP  1209   Status: 200 OK | 

SIP/2.0 200 OK
    Message Header
        Via: SIP/2.0/TCP 
10.0.6.123:5566;branch=z9hG4bK7213.f3002b09662ea2ed11fec68e8340bb56.0;i=3
        Via: SIP/2.0/TCP 
10.0.3.144:5566;received=10.0.3.144;rport=5566;branch=z9hG4bKPjb2f6c5fa-af86-440d-aa56-5180ba9f11f1;alias
        Record-Route: 
<sip:10.0.6.123:5566;transport=tcp;lr=on;ftag=8acfe81e-5406-4fdd-88cd-94be97032897;nat=yes>
        From: <sip:10.0.3.144>;tag=8acfe81e-5406-4fdd-88cd-94be97032897
        To: <sip:71010@10.0.6.123>;tag=271292769
        Call-ID: f48cda08-7ddc-475a-bacb-e713cb869c3e
        CSeq: 24589 INVITE
        Contact: <sip:71010@10.0.13.23:5060;transport=tcp>
        Supported: replaces, path, timer
        User-Agent: Grandstream GXP1620 1.0.4.128
        Session-Expires: 1800;refresher=uac
        Require: timer
        Allow: INVITE, ACK, OPTIONS, CANCEL, BYE, SUBSCRIBE, NOTIFY, INFO, 
REFER, UPDATE, MESSAGE
        Content-Type: application/sdp
        Content-Length:   301
    Message Body
        Session Description Protocol
            Session Description Protocol Version (v): 0
            Owner/Creator, Session Id (o): 71010 8000 8000 IN IP4 10.0.13.23
            Session Name (s): SIP Call
            Connection Information (c): IN IP4 10.0.13.23
            Time Description, active time (t): 0 0
            Media Description, name and address (m): audio 5004 RTP/AVP 9 0 8 
97 101
            Media Attribute (a): sendrecv
            Media Attribute (a): rtpmap:9 G722/8000
            Media Attribute (a): ptime:20
            Media Attribute (a): rtpmap:0 PCMU/8000
            Media Attribute (a): rtpmap:8 PCMA/8000
            Media Attribute (a): rtpmap:97 iLBC/8000
            Media Attribute (a): fmtp:97 mode=30
            Media Attribute (a): rtpmap:101 telephone-event/8000
            Media Attribute (a): fmtp:101 0-15

No.     Time                          Source                Destination         
  Protocol Length Info
     17 2018-09-27 08:14:29,583295    10.0.6.123            10.0.3.144          
  SIP/SDP  1182   [TCP ACKed unseen segment] [TCP Previous segment not 
captured] Status: 200 OK | 

SIP/2.0 200 OK
    Message Header
        Via: SIP/2.0/TCP 
10.0.3.144:5566;received=10.0.3.144;rport=5566;branch=z9hG4bKPjb2f6c5fa-af86-440d-aa56-5180ba9f11f1;alias
        Record-Route: 
<sip:10.0.6.123:5566;transport=tcp;lr=on;ftag=8acfe81e-5406-4fdd-88cd-94be97032897;nat=yes>
        From: <sip:10.0.3.144>;tag=8acfe81e-5406-4fdd-88cd-94be97032897
        To: <sip:71010@10.0.6.123>;tag=271292769
        Call-ID: f48cda08-7ddc-475a-bacb-e713cb869c3e
        CSeq: 24589 INVITE
        Contact: <sip:71010@10.0.13.23:47790;transport=tcp>
        Supported: replaces, path, timer
        User-Agent: Grandstream GXP1620 1.0.4.128
        Session-Expires: 1800;refresher=uac
        Require: timer
        Allow: INVITE, ACK, OPTIONS, CANCEL, BYE, SUBSCRIBE, NOTIFY, INFO, 
REFER, UPDATE, MESSAGE
        Content-Type: application/sdp
        Content-Length:   326
        P-hint: (3)passed thru onreplay_route
    Message Body
        Session Description Protocol
            Session Description Protocol Version (v): 0
            Owner/Creator, Session Id (o): 71010 8000 8000 IN IP4 193.17.229.80
            Session Name (s): SIP Call
            Connection Information (c): IN IP4 193.17.229.80
            Time Description, active time (t): 0 0
            Media Description, name and address (m): audio 50166 RTP/AVP 9 0 8 
97 101
            Media Attribute (a): sendrecv
            Media Attribute (a): rtpmap:9 G722/8000
            Media Attribute (a): ptime:20
            Media Attribute (a): rtpmap:0 PCMU/8000
            Media Attribute (a): rtpmap:8 PCMA/8000
            Media Attribute (a): rtpmap:97 iLBC/8000
            Media Attribute (a): fmtp:97 mode=30
            Media Attribute (a): rtpmap:101 telephone-event/8000
            Media Attribute (a): fmtp:101 0-15
            Media Attribute (a): nortpproxy:yes

No.     Time                          Source                Destination         
  Protocol Length Info
     18 2018-09-27 08:14:29,596582    10.0.3.144            10.0.6.123          
  SIP/SDP  1269   [TCP ACKed unseen segment] [TCP Previous segment not 
captured] Status: 200 OK | 

SIP/2.0 200 OK
    Message Header
        Via: SIP/2.0/TCP 
10.0.6.123:5566;rport=33506;received=10.0.6.123;branch=z9hG4bK2d83.4d12cc34432001052415c4a2ffd521a2.0;i=2
        Via: SIP/2.0/TCP 
10.0.8.249:63823;rport=63823;branch=z9hG4bKPjdde1ae7c273d440f9fa5e53f0db5b90d;alias
        Record-Route: 
<sip:10.0.6.123:33506;transport=TCP;lr;ftag=fd1273f0373d4241be9fd59f55da6113;nat=yes>
        Call-ID: fcf1a883ccea421d8d519ad26502f7d6
        From: 
<sip:61...@ving3-dev-kamailio.musala.com>;tag=fd1273f0373d4241be9fd59f55da6113
        To: 
<sip:71...@ving3-dev-kamailio.musala.com>;tag=c58be9d7-5cfa-48dc-a29e-c85b2e008a2e
        CSeq: 2185 INVITE
        Server: Asterisk PBX 15.1.2
        Allow: OPTIONS, SUBSCRIBE, NOTIFY, PUBLISH, INVITE, ACK, BYE, CANCEL, 
UPDATE, PRACK, REGISTER, MESSAGE, REFER
        Contact: <sip:10.0.3.144:5566;transport=TCP>
        Supported: 100rel, timer, replaces, norefersub
        Session-Expires: 1800;refresher=uac
        Require: timer
        Content-Type: application/sdp
        Content-Length:   281
    Message Body
        Session Description Protocol
            Session Description Protocol Version (v): 0
            Owner/Creator, Session Id (o): - 3747024866 3747024868 IN IP4 
10.0.3.144
            Session Name (s): Asterisk
            Connection Information (c): IN IP4 10.0.3.144
            Time Description, active time (t): 0 0
            Media Description, name and address (m): audio 15154 RTP/AVP 9 8 0 
101
            Media Attribute (a): rtpmap:9 G722/8000
            Media Attribute (a): rtpmap:8 PCMA/8000
            Media Attribute (a): rtpmap:0 PCMU/8000
            Media Attribute (a): rtpmap:101 telephone-event/8000
            Media Attribute (a): fmtp:101 0-16
            Media Attribute (a): ptime:20
            Media Attribute (a): maxptime:150
            Media Attribute (a): sendrecv

Attachment: kamailio.cfg
Description: Binary data

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