Hi,
this is sip trace in FS server.

interface: eth0 (123.123.123.127/255.255.255.224)
filter: (ip) and ( port 5060 )

U 123.21.238.196:22938 -> 123.123.123.123:5060
INVITE sip:1001@123.123.123.123 SIP/2.0.
Via: SIP/2.0/UDP 123.21.238.196:22938;branch=z9hG4bK-d87543-d61b031c5e253c03-1--d87543-;rport.
Max-Forwards: 70.
Contact: <sip:1000@123.21.238.196:22938>.
To: "1001"<sip:1001@123.123.123.123>.
From: "1000"<sip:1000@123.123.123.123>;tag=eb72d35a.
Call-ID: Y2M1MWQ1MWFhMjJmYWEzMDgwYzY4N2U3ZjhhZmYxYzk..
CSeq: 1 INVITE.
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE, SUBSCRIBE, INFO.
Content-Type: application/sdp.
User-Agent: X-Lite release 1011s stamp 41150.
Content-Length: 475.
.
v=0.
o=- 2 2 IN IP4 123.21.238.196.
s=CounterPath X-Lite 3.0.
c=IN IP4 123.21.238.196.
t=0 0.
m=audio 45146 RTP/AVP 107 119 100 106 0 105 98 8 101.
a=alt:1 2 : +5fil0fi ho2/O/qw 192.168.1.2 45146.
a=alt:2 1 : Ry0ImV0p jCU6QTba 169.254.186.19 45146.
a=fmtp:101 0-15.
a=rtpmap:107 BV32/16000.
a=rtpmap:119 BV32-FEC/16000.
a=rtpmap:100 SPEEX/16000.
a=rtpmap:106 SPEEX-FEC/16000.
a=rtpmap:105 SPEEX-FEC/8000.
a=rtpmap:98 iLBC/8000.
a=rtpmap:101 telephone-event/8000.
a=sendrecv.


U 123.123.123.123:5060 -> 123.21.238.196:22938
SIP/2.0 100 Trying.
Via: SIP/2.0/UDP 123.21.238.196:22938;branch=z9hG4bK-d87543-d61b031c5e253c03-1--d87543-;rport=22938.
From: "1000"<sip:1000@123.123.123.123>;tag=eb72d35a.
To: "1001"<sip:1001@123.123.123.123>.
Call-ID: Y2M1MWQ1MWFhMjJmYWEzMDgwYzY4N2U3ZjhhZmYxYzk..
CSeq: 1 INVITE.
User-Agent: FreeSWITCH-mod_sofia/1.4.0.
Content-Length: 0.
.


U 123.123.123.123:5060 -> 123.21.238.196:22938
SIP/2.0 100 Trying.
Via: SIP/2.0/UDP 123.21.238.196:22938;branch=z9hG4bK-d87543-d61b031c5e253c03-1--d87543-;rport=22938.
From: "1000"<sip:1000@123.123.123.123>;tag=eb72d35a.
To: "1001"<sip:1001@123.123.123.123>.
Call-ID: Y2M1MWQ1MWFhMjJmYWEzMDgwYzY4N2U3ZjhhZmYxYzk..
CSeq: 1 INVITE.
Contact: <sip:1000@123.123.123.123>.
User-Agent: FreeSWITCH-mod_sofia/1.4.0.
Accept: application/sdp.
Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY.
Supported: timer, precondition, path, replaces.
Allow-Events: talk, hold, conference, refer.
Content-Length: 0.
.


U 123.123.123.123:5060 -> 123.123.123.126:5060
INVITE sip:1001@123.123.123.126 SIP/2.0.
Via: SIP/2.0/UDP 123.123.123.123;rport;branch=z9hG4bK16gBQmKHS6Smj.
Max-Forwards: 70.
From: <sip:1000@123.123.123.126>;tag=DKcv9cF2pa3vr.
To: <sip:1001@123.123.123.126>.
Call-ID: Y2M1MWQ1MWFhMjJmYWEzMDgwYzY4N2U3ZjhhZmYxYzk..
CSeq: 2 INVITE.
Contact: <sip:1000@123.123.123.126:5060>.
User-Agent: FreeSWITCH-mod_sofia/1.4.0.
Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY.
Supported: timer, precondition, path, replaces.
Allow-Events: talk, hold, conference, refer.
Content-Type: application/sdp.
Content-Disposition: session.
Content-Length: 157.
.
v=0.
o=FreeSWITCH 1376087327 1376087328 IN IP4 123.123.123.123.
s=FreeSWITCH.
t=0 0.
m=audio 8000 RTP/AVP 8 0.
c=IN IP4 123.123.123.123.
a=rtpmap:0 PCMU/8000.


U 123.123.123.126:5060 -> 123.123.123.123:5060
SIP/2.0 401 Unauthorized.
Via: SIP/2.0/UDP 123.123.123.123;branch=z9hG4bK16gBQmKHS6Smj;received=123.123.123.123;rport=5060.
From: <sip:1000@123.123.123.126>;tag=DKcv9cF2pa3vr.
To: <sip:1001@123.123.123.126>;tag=as2cd7f37a.
Call-ID: Y2M1MWQ1MWFhMjJmYWEzMDgwYzY4N2U3ZjhhZmYxYzk..
CSeq: 2 INVITE.
Server: Gentrice IPPBX.
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH.
Supported: replaces, timer.
WWW-Authenticate: Digest algorithm=MD5, realm="asterisk", nonce="516141bc".
Content-Length: 0.
.


U 123.123.123.123:5060 -> 123.123.123.126:5060
ACK sip:1001@123.123.123.126 SIP/2.0.
Via: SIP/2.0/UDP 123.123.123.123;rport;branch=z9hG4bK16gBQmKHS6Smj.
Max-Forwards: 70.
From: <sip:1000@123.123.123.126>;tag=DKcv9cF2pa3vr.
To: <sip:1001@123.123.123.126>;tag=as2cd7f37a.
Call-ID: Y2M1MWQ1MWFhMjJmYWEzMDgwYzY4N2U3ZjhhZmYxYzk..
CSeq: 2 ACK.
Content-Length: 0.
.


U 123.123.123.123:5060 -> 123.21.238.196:22938
SIP/2.0 401 Unauthorized.
Via: SIP/2.0/UDP 123.21.238.196:22938;branch=z9hG4bK-d87543-d61b031c5e253c03-1--d87543-;rport=22938.
From: "1000"<sip:1000@123.123.123.123>;tag=eb72d35a.
To: "1001" <sip:1001@123.123.123.123>;tag=caK37HyyS1caD.
Call-ID: Y2M1MWQ1MWFhMjJmYWEzMDgwYzY4N2U3ZjhhZmYxYzk..
CSeq: 1 INVITE.
User-Agent: FreeSWITCH-mod_sofia/1.4.0.
Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY.
Supported: timer, precondition, path, replaces.
Allow-Events: talk, hold, conference, refer.
WWW-Authenticate: Digest realm="asterisk", nonce="516141bc", algorithm=MD5.
Content-Length: 0.
.


U 123.21.238.196:22938 -> 123.123.123.123:5060
ACK sip:1001@123.123.123.123 SIP/2.0.
Via: SIP/2.0/UDP 123.21.238.196:22938;branch=z9hG4bK-d87543-d61b031c5e253c03-1--d87543-;rport.
To: "1001" <sip:1001@123.123.123.123>;tag=caK37HyyS1caD.
From: "1000"<sip:1000@123.123.123.123>;tag=eb72d35a.
Call-ID: Y2M1MWQ1MWFhMjJmYWEzMDgwYzY4N2U3ZjhhZmYxYzk..
CSeq: 1 ACK.
Content-Length: 0.
.


U 123.21.238.196:22938 -> 123.123.123.123:5060
INVITE sip:1001@123.123.123.123 SIP/2.0.
Via: SIP/2.0/UDP 123.21.238.196:22938;branch=z9hG4bK-d87543-d04923161d7eba2b-1--d87543-;rport.
Max-Forwards: 70.
Contact: <sip:1000@123.21.238.196:22938>.
To: "1001"<sip:1001@123.123.123.123>.
From: "1000"<sip:1000@123.123.123.123>;tag=eb72d35a.
Call-ID: Y2M1MWQ1MWFhMjJmYWEzMDgwYzY4N2U3ZjhhZmYxYzk..
CSeq: 2 INVITE.
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE, SUBSCRIBE, INFO.
Content-Type: application/sdp.
User-Agent: X-Lite release 1011s stamp 41150.
Authorization: Digest username="1000",realm="asterisk",nonce="516141bc",uri="sip:1001@123.123.123.123",response="f2a07bf5213207b0ffc682095868ce47",algorithm=MD5.
Content-Length: 475.
.
v=0.
o=- 2 2 IN IP4 123.21.238.196.
s=CounterPath X-Lite 3.0.
c=IN IP4 123.21.238.196.
t=0 0.
m=audio 45146 RTP/AVP 107 119 100 106 0 105 98 8 101.
a=alt:1 2 : +5fil0fi ho2/O/qw 192.168.1.2 45146.
a=alt:2 1 : Ry0ImV0p jCU6QTba 169.254.186.19 45146.
a=fmtp:101 0-15.
a=rtpmap:107 BV32/16000.
a=rtpmap:119 BV32-FEC/16000.
a=rtpmap:100 SPEEX/16000.
a=rtpmap:106 SPEEX-FEC/16000.
a=rtpmap:105 SPEEX-FEC/8000.
a=rtpmap:98 iLBC/8000.
a=rtpmap:101 telephone-event/8000.
a=sendrecv.


U 123.123.123.123:5060 -> 123.21.238.196:22938
SIP/2.0 100 Trying.
Via: SIP/2.0/UDP 123.21.238.196:22938;branch=z9hG4bK-d87543-d04923161d7eba2b-1--d87543-;rport=22938.
From: "1000"<sip:1000@123.123.123.123>;tag=eb72d35a.
To: "1001"<sip:1001@123.123.123.123>.
Call-ID: Y2M1MWQ1MWFhMjJmYWEzMDgwYzY4N2U3ZjhhZmYxYzk..
CSeq: 2 INVITE.
User-Agent: FreeSWITCH-mod_sofia/1.4.0.
Content-Length: 0.
.


U 123.123.123.123:5060 -> 123.21.238.196:22938
SIP/2.0 407 Proxy Authentication Required.
Via: SIP/2.0/UDP 123.21.238.196:22938;branch=z9hG4bK-d87543-d04923161d7eba2b-1--d87543-;rport=22938.
From: "1000"<sip:1000@123.123.123.123>;tag=eb72d35a.
To: "1001" <sip:1001@123.123.123.123>;tag=ev5mB8Z5KKSFm.
Call-ID: Y2M1MWQ1MWFhMjJmYWEzMDgwYzY4N2U3ZjhhZmYxYzk..
CSeq: 2 INVITE.
User-Agent: FreeSWITCH-mod_sofia/1.4.0.
Accept: application/sdp.
Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY.
Supported: timer, precondition, path, replaces.
Allow-Events: talk, hold, conference, refer.
Proxy-Authenticate: Digest realm="123.123.123.123", nonce="f8e49022-48fa-4f40-9598-9ba8c910768f", algorithm=MD5, qop="auth".
Content-Length: 0.
.


U 123.21.238.196:22938 -> 123.123.123.123:5060
ACK sip:1001@123.123.123.123 SIP/2.0.
Via: SIP/2.0/UDP 123.21.238.196:22938;branch=z9hG4bK-d87543-d04923161d7eba2b-1--d87543-;rport.
To: "1001" <sip:1001@123.123.123.123>;tag=ev5mB8Z5KKSFm.
From: "1000"<sip:1000@123.123.123.123>;tag=eb72d35a.
Call-ID: Y2M1MWQ1MWFhMjJmYWEzMDgwYzY4N2U3ZjhhZmYxYzk..
CSeq: 2 ACK.
Content-Length: 0.
.


U 123.21.238.196:22938 -> 123.123.123.123:5060
INVITE sip:1001@123.123.123.123 SIP/2.0.
Via: SIP/2.0/UDP 123.21.238.196:22938;branch=z9hG4bK-d87543-6f33d61ceb017321-1--d87543-;rport.
Max-Forwards: 70.
Contact: <sip:1000@123.21.238.196:22938>.
To: "1001"<sip:1001@123.123.123.123>.
From: "1000"<sip:1000@123.123.123.123>;tag=eb72d35a.
Call-ID: Y2M1MWQ1MWFhMjJmYWEzMDgwYzY4N2U3ZjhhZmYxYzk..
CSeq: 3 INVITE.
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE, SUBSCRIBE, INFO.
Content-Type: application/sdp.
Proxy-Authorization: Digest username="1000",realm="123.123.123.123",nonce="f8e49022-48fa-4f40-9598-9ba8c910768f",uri="sip:1001@123.123.123.123",response="c462ce26b110d412f825fe0577c63453",cnonce="2f3a630b7a6dfdb967e55008c6f55265",nc=00000001,qop=auth,algorithm=MD5.
User-Agent: X-Lite release 1011s stamp 41150.
Authorization: Digest username="1000",realm="asterisk",nonce="516141bc",uri="sip:1001@123.123.123.123",response="f2a07bf5213207b0ffc682095868ce47",algorithm=MD5.
Content-Length: 475.
.
v=0.
o=- 2 2 IN IP4 123.21.238.196.
s=CounterPath X-Lite 3.0.
c=IN IP4 123.21.238.196.
t=0 0.
m=audio 45146 RTP/AVP 107 119 100 106 0 105 98 8 101.
a=alt:1 2 : +5fil0fi ho2/O/qw 192.168.1.2 45146.
a=alt:2 1 : Ry0ImV0p jCU6QTba 169.254.186.19 45146.
a=fmtp:101 0-15.
a=rtpmap:107 BV32/16000.
a=rtpmap:119 BV32-FEC/16000.
a=rtpmap:100 SPEEX/16000.
a=rtpmap:106 SPEEX-FEC/16000.
a=rtpmap:105 SPEEX-FEC/8000.
a=rtp

U 123.123.123.123:5060 -> 123.21.238.196:22938
SIP/2.0 100 Trying.
Via: SIP/2.0/UDP 123.21.238.196:22938;branch=z9hG4bK-d87543-6f33d61ceb017321-1--d87543-;rport=22938.
From: "1000"<sip:1000@123.123.123.123>;tag=eb72d35a.
To: "1001"<sip:1001@123.123.123.123>.
Call-ID: Y2M1MWQ1MWFhMjJmYWEzMDgwYzY4N2U3ZjhhZmYxYzk..
CSeq: 3 INVITE.
User-Agent: FreeSWITCH-mod_sofia/1.4.0.
Content-Length: 0.
.


U 123.123.123.123:5060 -> 123.123.123.126:5060
INVITE sip:1001@123.123.123.126 SIP/2.0.
Via: SIP/2.0/UDP 123.123.123.123;rport;branch=z9hG4bK2Fa4rF4mpFg7D.
Max-Forwards: 69.
From: "1000" <sip:1000@123.123.123.123>;tag=ger6ey1ce55mB.
To: <sip:1001@123.123.123.126:5060>;tag=as2cd7f37a.
Call-ID: Y2M1MWQ1MWFhMjJmYWEzMDgwYzY4N2U3ZjhhZmYxYzk..
CSeq: 3 INVITE.
Contact: <sip:1000@123.123.123.123:5060>.
User-Agent: FreeSWITCH-mod_sofia/1.4.0.
Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY.
Supported: timer, precondition, path, replaces.
Allow-Events: talk, hold, conference, refer.
Authorization: Digest username="1000", realm="asterisk", uri="sip:1001@123.123.123.123", nonce="516141bc", response="f2a07bf5213207b0ffc682095868ce47", algorithm=MD5.
Content-Type: application/sdp.
Content-Disposition: session.
Content-Length: 463.
X-ROUTE: LOOKUP.
X-FS-Support: update_display,send_info.
Remote-Party-ID: "1000" <sip:1000@123.123.123.123>;party=calling;screen=yes;privacy=off.
.
v=0.
o=- 2 2 IN IP4 123.21.238.196.
s=CounterPath X-Lite 3.0.
c=IN IP4 123.21.238.196.
t=0 0.
m=audio 45146 RTP/AVP 107 119 100 106 0 105 98 8 101.
a=rtpmap:107 BV32/16000.
a=rtpmap:119 BV32-FEC/16000.
a=rtpmap:100 SPEEX/16000.
a=rtpmap:106 SPEEX-FEC/16000.
a=rtpmap:105 SPEEX-FEC/8000.
a=rtpmap:98 iLBC/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-15.
a=alt:1 2 : +5fil0fi ho2/O/qw 192.168.1.2 45146.
a=alt:2 1 : Ry0ImV0p jCU6QTba 169.254.186.19 45146.


U 123.123.123.126:5060 -> 123.123.123.123:5060
SIP/2.0 100 Trying.
Via: SIP/2.0/UDP 123.123.123.123;branch=z9hG4bK2Fa4rF4mpFg7D;received=123.123.123.123;rport=5060.
From: "1000" <sip:1000@123.123.123.123>;tag=ger6ey1ce55mB.
To: <sip:1001@123.123.123.126:5060>;tag=as2cd7f37a.
Call-ID: Y2M1MWQ1MWFhMjJmYWEzMDgwYzY4N2U3ZjhhZmYxYzk..
CSeq: 3 INVITE.
Server: Gentrice IPPBX.
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH.
Supported: replaces, timer.
Contact: <sip:1001@123.123.123.126:5060>.
Content-Length: 0.
.


U 123.123.123.126:5060 -> 123.123.123.123:5060
SIP/2.0 180 Ringing.
Via: SIP/2.0/UDP 123.123.123.123;branch=z9hG4bK2Fa4rF4mpFg7D;received=123.123.123.123;rport=5060.
From: "1000" <sip:1000@123.123.123.123>;tag=ger6ey1ce55mB.
To: <sip:1001@123.123.123.126:5060>;tag=as2cd7f37a.
Call-ID: Y2M1MWQ1MWFhMjJmYWEzMDgwYzY4N2U3ZjhhZmYxYzk..
CSeq: 3 INVITE.
Server: Gentrice IPPBX.
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH.
Supported: replaces, timer.
Contact: <sip:1001@123.123.123.126:5060>.
Content-Length: 0.
.


U 123.123.123.123:5060 -> 123.21.238.196:22938
SIP/2.0 180 Ringing.
Via: SIP/2.0/UDP 123.21.238.196:22938;branch=z9hG4bK-d87543-6f33d61ceb017321-1--d87543-;rport=22938.
From: "1000"<sip:1000@123.123.123.123>;tag=eb72d35a.
To: "1001" <sip:1001@123.123.123.123>;tag=F5yDD3g9gvF2F.
Call-ID: Y2M1MWQ1MWFhMjJmYWEzMDgwYzY4N2U3ZjhhZmYxYzk..
CSeq: 3 INVITE.
Contact: <sip:1001@123.123.123.123:5060;transport=udp>.
User-Agent: FreeSWITCH-mod_sofia/1.4.0.
Accept: application/sdp.
Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY.
Supported: timer, precondition, path, replaces.
Allow-Events: talk, hold, conference, refer.
Content-Length: 0.
Remote-Party-ID: "Outbound Call" <sip:1001@123.123.123.123>;party=calling;privacy=off;screen=no.
.


U 123.123.123.126:5060 -> 123.123.123.123:5060
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 123.123.123.123;branch=z9hG4bK2Fa4rF4mpFg7D;received=123.123.123.123;rport=5060.
From: "1000" <sip:1000@123.123.123.123>;tag=ger6ey1ce55mB.
To: <sip:1001@123.123.123.126:5060>;tag=as2cd7f37a.
Call-ID: Y2M1MWQ1MWFhMjJmYWEzMDgwYzY4N2U3ZjhhZmYxYzk..
CSeq: 3 INVITE.
Server: Gentrice IPPBX.
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH.
Supported: replaces, timer.
Contact: <sip:1001@123.123.123.126:5060>.
Content-Type: application/sdp.
Content-Length: 262.
.
v=0.
o=gentrice 1875783318 1875783318 IN IP4 123.123.123.126.
s=Gentrice IPPBX.
c=IN IP4 123.123.123.126.
t=0 0.
m=audio 18668 RTP/AVP 0 8 101.
a=rtpmap:0 PCMU/8000.
a=rtpmap:8 PCMA/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-16.
a=ptime:20.
a=sendrecv.


U 123.123.123.123:5060 -> 123.123.123.126:5060
ACK sip:1001@123.123.123.126:5060 SIP/2.0.
Via: SIP/2.0/UDP 123.123.123.123;rport;branch=z9hG4bK3r3vtaNrKr6SS.
Max-Forwards: 70.
From: "1000" <sip:1000@123.123.123.123>;tag=ger6ey1ce55mB.
To: <sip:1001@123.123.123.126>;tag=as2cd7f37a.
Call-ID: Y2M1MWQ1MWFhMjJmYWEzMDgwYzY4N2U3ZjhhZmYxYzk..
CSeq: 3 ACK.
Contact: <sip:1000@123.123.123.123:5060>.
Authorization: Digest username="1000", realm="asterisk", uri="sip:1001@123.123.123.123", nonce="516141bc", response="f2a07bf5213207b0ffc682095868ce47", algorithm=MD5.
Content-Length: 0.
.


U 123.123.123.123:5060 -> 123.21.238.196:22938
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 123.21.238.196:22938;branch=z9hG4bK-d87543-6f33d61ceb017321-1--d87543-;rport=22938.
From: "1000"<sip:1000@123.123.123.123>;tag=eb72d35a.
To: "1001" <sip:1001@123.123.123.123>;tag=F5yDD3g9gvF2F.
Call-ID: Y2M1MWQ1MWFhMjJmYWEzMDgwYzY4N2U3ZjhhZmYxYzk..
CSeq: 3 INVITE.
Contact: <sip:1001@123.123.123.123:5060;transport=udp>.
User-Agent: FreeSWITCH-mod_sofia/1.4.0.
Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY.
Supported: timer, precondition, path, replaces.
Allow-Events: talk, hold, conference, refer.
Content-Type: application/sdp.
Content-Disposition: session.
Content-Length: 250.
Remote-Party-ID: "Outbound Call" <sip:1001@123.123.123.123>;party=calling;privacy=off;screen=no.
.
v=0.
o=gentrice 1875783318 1875783318 IN IP4 123.123.123.126.
s=Gentrice IPPBX.
c=IN IP4 123.123.123.126.
t=0 0.
m=audio 18668 RTP/AVP 0 8 101.
a=rtpmap:0 PCMU/8000.
a=rtpmap:8 PCMA/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-16.
a=ptime:20.


U 123.21.238.196:22938 -> 123.123.123.123:5060
ACK sip:1001@123.123.123.123:5060;transport=udp SIP/2.0.
Via: SIP/2.0/UDP 123.21.238.196:22938;branch=z9hG4bK-d87543-b84af33f8130dd5e-1--d87543-;rport.
Max-Forwards: 70.
Contact: <sip:1000@123.21.238.196:22938>.
To: "1001"<sip:1001@123.123.123.123>;tag=F5yDD3g9gvF2F.
From: "1000"<sip:1000@123.123.123.123>;tag=eb72d35a.
Call-ID: Y2M1MWQ1MWFhMjJmYWEzMDgwYzY4N2U3ZjhhZmYxYzk..
CSeq: 3 ACK.
Proxy-Authorization: Digest username="1000",realm="123.123.123.123",nonce="f8e49022-48fa-4f40-9598-9ba8c910768f",uri="sip:1001@123.123.123.123",response="c462ce26b110d412f825fe0577c63453",cnonce="2f3a630b7a6dfdb967e55008c6f55265",nc=00000001,qop=auth,algorithm=MD5.
User-Agent: X-Lite release 1011s stamp 41150.
Authorization: Digest username="1000",realm="asterisk",nonce="516141bc",uri="sip:1001@123.123.123.123",response="f2a07bf5213207b0ffc682095868ce47",algorithm=MD5.
Content-Length: 0.
.


U 123.123.123.126:5060 -> 123.123.123.123:5060
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 123.123.123.123;branch=z9hG4bK2Fa4rF4mpFg7D;received=123.123.123.123;rport=5060.
From: "1000" <sip:1000@123.123.123.123>;tag=ger6ey1ce55mB.
To: <sip:1001@123.123.123.126:5060>;tag=as2cd7f37a.
Call-ID: Y2M1MWQ1MWFhMjJmYWEzMDgwYzY4N2U3ZjhhZmYxYzk..
CSeq: 3 INVITE.
Server: Gentrice IPPBX.
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH.
Supported: replaces, timer.
Contact: <sip:1001@123.123.123.126:5060>.
Content-Type: application/sdp.
Content-Length: 262.
.
v=0.
o=gentrice 1875783318 1875783318 IN IP4 123.123.123.126.
s=Gentrice IPPBX.
c=IN IP4 123.123.123.126.
t=0 0.
m=audio 18668 RTP/AVP 0 8 101.
a=rtpmap:0 PCMU/8000.
a=rtpmap:8 PCMA/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-16.
a=ptime:20.
a=sendrecv.


U 123.123.123.123:5060 -> 123.123.123.126:5060
ACK sip:1001@123.123.123.126:5060 SIP/2.0.
Via: SIP/2.0/UDP 123.123.123.123;rport;branch=z9hG4bK3r3vtaNrKr6SS.
Max-Forwards: 70.
From: "1000" <sip:1000@123.123.123.123>;tag=ger6ey1ce55mB.
To: <sip:1001@123.123.123.126>;tag=as2cd7f37a.
Call-ID: Y2M1MWQ1MWFhMjJmYWEzMDgwYzY4N2U3ZjhhZmYxYzk..
CSeq: 3 ACK.
Contact: <sip:1000@123.123.123.123:5060>.
Authorization: Digest username="1000", realm="asterisk", uri="sip:1001@123.123.123.123", nonce="516141bc", response="f2a07bf5213207b0ffc682095868ce47", algorithm=MD5.
Content-Length: 0.
.


U 123.123.123.126:5060 -> 123.123.123.123:5060
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 123.123.123.123;branch=z9hG4bK2Fa4rF4mpFg7D;received=123.123.123.123;rport=5060.
From: "1000" <sip:1000@123.123.123.123>;tag=ger6ey1ce55mB.
To: <sip:1001@123.123.123.126:5060>;tag=as2cd7f37a.
Call-ID: Y2M1MWQ1MWFhMjJmYWEzMDgwYzY4N2U3ZjhhZmYxYzk..
CSeq: 3 INVITE.
Server: Gentrice IPPBX.
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH.
Supported: replaces, timer.
Contact: <sip:1001@123.123.123.126:5060>.
Content-Type: application/sdp.
Content-Length: 262.
.
v=0.
o=gentrice 1875783318 1875783318 IN IP4 123.123.123.126.
s=Gentrice IPPBX.
c=IN IP4 123.123.123.126.
t=0 0.
m=audio 18668 RTP/AVP 0 8 101.
a=rtpmap:0 PCMU/8000.
a=rtpmap:8 PCMA/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-16.
a=ptime:20.
a=sendrecv.


U 123.123.123.123:5060 -> 123.123.123.126:5060
ACK sip:1001@123.123.123.126:5060 SIP/2.0.
Via: SIP/2.0/UDP 123.123.123.123;rport;branch=z9hG4bK3r3vtaNrKr6SS.
Max-Forwards: 70.
From: "1000" <sip:1000@123.123.123.123>;tag=ger6ey1ce55mB.
To: <sip:1001@123.123.123.126>;tag=as2cd7f37a.
Call-ID: Y2M1MWQ1MWFhMjJmYWEzMDgwYzY4N2U3ZjhhZmYxYzk..
CSeq: 3 ACK.
Contact: <sip:1000@123.123.123.123:5060>.
Authorization: Digest username="1000", realm="asterisk", uri="sip:1001@123.123.123.123", nonce="516141bc", response="f2a07bf5213207b0ffc682095868ce47", algorithm=MD5.
Content-Length: 0.
.


U 123.21.238.196:22938 -> 123.123.123.123:5060
.
.
..............

U 123.123.123.126:5060 -> 123.123.123.123:5060
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 123.123.123.123;branch=z9hG4bK2Fa4rF4mpFg7D;received=123.123.123.123;rport=5060.
From: "1000" <sip:1000@123.123.123.123>;tag=ger6ey1ce55mB.
To: <sip:1001@123.123.123.126:5060>;tag=as2cd7f37a.
Call-ID: Y2M1MWQ1MWFhMjJmYWEzMDgwYzY4N2U3ZjhhZmYxYzk..
CSeq: 3 INVITE.
Server: Gentrice IPPBX.
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH.
Supported: replaces, timer.
Contact: <sip:1001@123.123.123.126:5060>.
Content-Type: application/sdp.
Content-Length: 262.
.
v=0.
o=gentrice 1875783318 1875783318 IN IP4 123.123.123.126.
s=Gentrice IPPBX.
c=IN IP4 123.123.123.126.
t=0 0.
m=audio 18668 RTP/AVP 0 8 101.
a=rtpmap:0 PCMU/8000.
a=rtpmap:8 PCMA/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-16.
a=ptime:20.
a=sendrecv.


U 123.123.123.123:5060 -> 123.123.123.126:5060
ACK sip:1001@123.123.123.126:5060 SIP/2.0.
Via: SIP/2.0/UDP 123.123.123.123;rport;branch=z9hG4bK3r3vtaNrKr6SS.
Max-Forwards: 70.
From: "1000" <sip:1000@123.123.123.123>;tag=ger6ey1ce55mB.
To: <sip:1001@123.123.123.126>;tag=as2cd7f37a.
Call-ID: Y2M1MWQ1MWFhMjJmYWEzMDgwYzY4N2U3ZjhhZmYxYzk..
CSeq: 3 ACK.
Contact: <sip:1000@123.123.123.123:5060>.
Authorization: Digest username="1000", realm="asterisk", uri="sip:1001@123.123.123.123", nonce="516141bc", response="f2a07bf5213207b0ffc682095868ce47", algorithm=MD5.
Content-Length: 0.
.
It Always getting 200OK and ACK from my FS server to asterisk server.

Hope some one can help me on this case.
thanks,
 
ThanhTruong

From: Michael Jerris <mike@jerris.com>
To: FreeSWITCH Users Help <freeswitch-users@lists.freeswitch.org>
Sent: Monday, September 9, 2013 7:14 PM
Subject: Re: [Freeswitch-users] NAT issue with SBC

have you looked at a Sip trace from both sides?  Is the ACK getting to asterisk?  Is it not accepting it for some reason?

On Sep 9, 2013, at 5:31 AM, ThanhTruong <ngoc217thanh@yahoo.com> wrote:


Hi all,

I have configure freeswitch as SBC server with one asterisk server.

I am getting nat issue when make call from FS to FS.

my case as:

client --- FS ----- Asterisk server ----- FS -----client.

my configure in public.xml like:

<extension name="asteirsk">
        <condition field="destination_number" expression="(\d+)$" require-nested="true">
            <condition field="network_addr" expression="^192\.168\.1\.123$"  break="never">
                <action application="set" data="hangup_after_bridge=true"/>
                <action application="export" data="sip_h_X-ROUTE=LOOKUP"/>
                <action application="set" data="bypass_media=true"/>
                <action application="bridge" data="user/${destination_number}@${domain_name}"/>
                <anti-action application="set" data="hangup_after_bridge=true"/>
                <anti-action application="export" data="sip_h_X-ROUTE=LOOKUP"/>
                <anti-action application="set" data="bypass_media=true"/>
                <anti-action application="bridge" data="sofia/internal/${destination_number}@192.168.1.123"/>
            </condition>
        </condition>
    </extension>

Call is process ok, But I see that when I answer call in destination, asterisk server alway send 200OK to my FS, FS return ACk, but asterisk resend 200OK.

if any one can help, thank all alot. I am getting this stage to long and cant find any solution here.

Thanks, 
 
ThanhTruong




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_________________________________________________________________________
Professional FreeSWITCH Consulting Services:
consulting@freeswitch.org
http://www.freeswitchsolutions.com

FreeSWITCH-powered IP PBX: The CudaTel Communication Server
http://www.cudatel.com

Official FreeSWITCH Sites
http://www.freeswitch.org
http://wiki.freeswitch.org
http://www.cluecon.com

FreeSWITCH-users mailing list
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http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
http://www.freeswitch.org