[Freeswitch-users] NAT / UDP hole punching issue
Tihomir Culjaga
tculjaga at gmail.com
Tue Feb 27 10:50:27 UTC 2018
hi,
I have "no audio" issue with TLS and i hope someone could help as Im
getting crazy ... literally :(
my setup is like this:
Phone <> NAT <> INTERNET <> NAT <FreeSWITCH>
FreeSWITCH version: 1.6.12~64bit ( 64bit)
I have a separate profile configured for TLS:
<param name="rtp-ip" value="192.168.100.60"/>
<param name="sip-ip" value="192.168.100.60"/>
<param name="apply-nat-acl" value="rfc1918"/>
<param name="ext-sip-ip" value="stun:stun.freeswitch.org"/>
<param name="ext-rtp-ip" value="stun:stun.freeswitch.org"/>
<!--<param name="aggressive-nat-detection" value="true"/>-->
<param name="tls-only" value="true"/>
<param name="tls-sip-port" value="15061"/>
=================================================================================================
Name tls-public
Domain Name N/A
Auto-NAT false
DBName sofia_reg_tls-public
Pres Hosts 192.168.100.60,192.168.100.60
Dialplan XML
Context public
Challenge Realm auto_from
RTP-IP 192.168.100.60
Ext-RTP-IP stun:stun.freeswitch.org
SIP-IP 192.168.100.60
Ext-SIP-IP 85.114.41.180
TLS-URL sip:mod_sofia at 85.114.41.180:15061
TLS-BIND-URL sips:mod_sofia at 85.114.41.180:15061
;maddr=192.168.100.60;transport=tls
WS-BIND-URL sip:mod_sofia at 192.168.100.60:5066;transport=ws
WSS-BIND-URL sips:mod_sofia at 192.168.100.60:7443;transport=wss
HOLD-MUSIC local_stream://moh
OUTBOUND-PROXY N/A
CODECS IN PCMA
CODECS OUT PCMA
TEL-EVENT 101
DTMF-MODE rfc2833
CNG 13
SESSION-TO 0
MAX-DIALOG 0
NOMEDIA false
LATE-NEG true
PROXY-MEDIA false
ZRTP-PASSTHRU false
AGGRESSIVENAT false
CALLS-IN 0
FAILED-CALLS-IN 0
CALLS-OUT 2
FAILED-CALLS-OUT 2
REGISTRATIONS 0
i manage to register the phone with no problems but when i call the phone i
get no audio;
bgapi expand originate ${sofia_contact(tls-profile/agent2/
nexios at 192.168.100.60)} &echo()
FS sends the invite as:
SDP in INVITE message from FS
v=0
o=FreeSWITCH 1519708899 1519708900 IN IP4 *85.114.41.180*
s=FreeSWITCH
c=IN IP4 *85.114.41.180*
t=0 0
m=audio *17480* RTP/AVP 8 101
a=rtpmap:8 PCMA/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=ptime:20
SIP Client responds with:
SDP in 200 OK from the client
v=0
o=- 3728718779 3728718780 IN IP4 *213.147.96.240*
s=pjmedia
b=AS:84
t=0 0
a=X-nat:0
m=audio *4002 *RTP/AVP 8 101
c=IN IP4 213.147.96.240
b=TIAS:64000
a=rtcp:4003 IN IP4 *213.147.96.240*
a=sendrecv
a=rtpmap:8 PCMA/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
So the UDP stream is: client( *4002 * ) <> ( *17480* )FS
when i sniff the traffic (on both sides client/FS) using wireshark, i see
RTP packets ( src:4002, dst:17480 ) leaving the client towards FS, but I
don't see RTP packets ( src:17480, dst:4002 ) from FS side leaving towards
the client.
so my question, of course, is why FS is not sending RTP packets to the
IP:PORT notified in 200 OK SDP from the client ? Did i miss some needed
configuration ?
in FS logs i see *192.168.100.60 port 17480 -> 213.147.96.240 port 4002*
but nothing is actually being sent out from FS
2018-02-27 11:13:02.733376 [DEBUG] sofia.c:6965 Channel
sofia/tls-public/sip:agent2/nexios at 213.147.96.240:10551 entering state
[ready][200]
2018-02-27 11:13:02.733376 [DEBUG] switch_core_media.c:4311 Audio Codec
Compare [PCMA:8:8000:20:64000:1]/[PCMA:8:8000:20:64000:1]
2018-02-27 11:13:02.733376 [DEBUG] switch_core_media.c:4366 Audio Codec
Compare [PCMA:8:8000:20:64000:1] ++++ is saved as a match
2018-02-27 11:13:02.733376 [DEBUG] switch_core_media.c:4227 Set
telephone-event payload to 101 at 8000
2018-02-27 11:13:02.733376 [DEBUG] switch_core_media.c:3021 Set Codec
sofia/tls-public/sip:agent2/nexios at 213.147.96.240:10551 PCMA/8000 20 ms 160
samples 64000 bits 1 channels
2018-02-27 11:13:02.733376 [DEBUG] switch_core_codec.c:111
sofia/tls-public/sip:agent2/nexios at 213.147.96.240:10551 Original read codec
set to PCMA:8
2018-02-27 11:13:02.733376 [DEBUG] switch_core_media.c:4572 Set
telephone-event payload to 101 at 8000
2018-02-27 11:13:02.733376 [DEBUG] switch_core_media.c:4631
sofia/tls-public/sip:agent2/nexios at 213.147.96.240:10551 Set 2833 dtmf send
payload to 101 recv payload to 101
2018-02-27 11:13:02.733376 [DEBUG] switch_core_media.c:6588 AUDIO RTP
[sofia/tls-public/sip:agent2/nexios at 213.147.96.240:10551] *192.168.100.60
port 17480 -> 213.147.96.240 port 4002 *codec: 8 ms: 20
2018-02-27 11:13:02.733376 [DEBUG] switch_rtp.c:3875 Starting timer [soft]
160 bytes per 20ms
2018-02-27 11:13:02.733376 [DEBUG] switch_core_media.c:6806 Activating RTCP
PORT 4003
2018-02-27 11:13:02.733376 [DEBUG] switch_rtp.c:4261 RTCP send rate is:
5000 and packet rate is: 20000 Remote Port: 4003
2018-02-27 11:13:02.733376 [DEBUG] switch_rtp.c:2534 Setting RTCP remote
addr to 213.147.96.240:4003 2
2018-02-27 11:13:02.733376 [DEBUG] switch_core_media.c:6887
sofia/tls-public/sip:agent2/nexios at 213.147.96.240:10551 Set 2833 dtmf send
payload to 101
2018-02-27 11:13:02.733376 [DEBUG] switch_core_media.c:6894
sofia/tls-public/sip:agent2/nexios at 213.147.96.240:10551 Set 2833 dtmf
receive payload to 101
2018-02-27 11:13:02.733376 [DEBUG] switch_core_media.c:6917
sofia/tls-public/sip:agent2/nexios at 213.147.96.240:10551 Set rtp dtmf delay
to 40
2018-02-27 11:13:02.733376 [NOTICE] sofia.c:8023 Channel
[sofia/tls-public/sip:agent2/nexios at 213.147.96.240:10551] has been answered
2018-02-27 11:13:02.733376 [DEBUG] switch_channel.c:3770
(sofia/tls-public/sip:agent2/nexios at 213.147.96.240:10551) Callstate Change
RINGING -> ACTIVE
2018-02-27 11:13:02.753388 [DEBUG] switch_ivr_originate.c:3686 Originate
Resulted in Success: [sofia/tls-public/sip:agent2/
nexios at 213.147.96.240:10551]
2018-02-27 11:13:02.753388 [INFO] switch_channel.c:3127
sofia/tls-public/sip:agent2/nexios at 213.147.96.240:10551 Flipping CID from
"" <0000000000> to "Outbound Call" <nexios>
2018-02-27 11:13:02.753388 [DEBUG] mod_commands.c:4788
(sofia/tls-public/sip:agent2/nexios at 213.147.96.240:10551) State Change
CS_CONSUME_MEDIA -> CS_EXECUTE
2018-02-27 11:13:02.753388 [DEBUG] switch_core_state_machine.c:584
(sofia/tls-public/sip:agent2/nexios at 213.147.96.240:10551) Running State
Change CS_EXECUTE
2018-02-27 11:13:02.753388 [DEBUG] switch_core_state_machine.c:650
(sofia/tls-public/sip:agent2/nexios at 213.147.96.240:10551) State EXECUTE
2018-02-27 11:13:02.753388 [DEBUG] mod_sofia.c:198
sofia/tls-public/sip:agent2/nexios at 213.147.96.240:10551 SOFIA EXECUTE
2018-02-27 11:13:02.753388 [DEBUG] switch_core_state_machine.c:328
sofia/tls-public/sip:agent2/nexios at 213.147.96.240:10551 Standard EXECUTE
EXECUTE sofia/tls-public/sip:agent2/nexios at 213.147.96.240:10551 echo()
Regards,
Tihomir.
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