Flexisip not forwarding register

[phillip]

Hello all

Has anyone else experienced an issue similar to this? Im using Linphone 
for my app, Flexisip for my proxy (for pushes) and FusionPBX for my SIP 
server.

After about a day, my phones stop being able to register through the 
proxy, if I restart Flexisip or reboot Fusionpbx the app connects fine 
again. It's as though the connection between Flexisip and Fusionpbx 
stops, then reconnects when either is restarted. I've whitelisted IP's 
in both firewalls and Ive had a constant SIP ping (on 5061) running the 
whole time and it's solid.. but then after a period Flexisip just stops 
sending the requests on.

When the issue is happens, the log ends here:


REGISTER sip:sip-server.example.com SIP/2.0
Via: SIP/2.0/TLS 
10.94.12.49:53429;alias;branch=z9hG4bK.HDEraPRJl;rport=42928;received=z.z.z.z
From: <sip:056XXXXXXXX@sip-server.example.com>;tag=omfftGlf4
To: sip:056XXXXXXXX@sip-server.example.com
CSeq: 20 REGISTER
Call-ID: 1xFiRMe-dt
Max-Forwards: 69
Supported: replaces, outbound, gruu
Accept: application/sdp, text/plain, 
application/vnd.gsma.rcs-ft-http+xml
Contact: 
<sip:056XXXXXXXX@flexisip.example.com:5060;fs-conn-id=a15b121e06d1a5db;CtRt725eff5ac1e5fa8e=tls:sip-server.example.com>;+sip.instance="<urn:uuid:8094365d-a4a3-0023-8c07-272bb75a6203>";+org.linphone.specs="ephemeral,groupchat,lime"
Expires: 2147483647
User-Agent: SoftphoneiOS/1.0.13 () LinphoneSDK/4.4.0-alpha.169+6f910f0
Content-Length: 0
Path: <sips:flexisip.example:5061;fs-proxy-id=725eff5ac1e5fa8e;lr>
2020-06-19 09:44:38:482 flexisip-debug-Message is sent through an 
outgoing transaction.
2020-06-19 09:44:38:482 flexisip-debug-tport_tsend(0x556755991ca0) tpn = 
tls/1.2.3.4:5061
2020-06-19 09:44:38:482 flexisip-debug-tport_queue(0x556755991ca0): 
queueing 0x556755ac9910 for tls/1.2.3.4:5061
2020-06-19 09:44:38:482 flexisip-debug-nta: sent REGISTER (20) to 
tls/1.2.3.4:5061
2020-06-19 09:44:38:482 flexisip-debug-tport_pend(0x556755991ca0): 
pending 0x556755ac9910 for tls/1.2.3.4:5061 (already 0)
2020-06-19 09:44:38:483 flexisip-debug-nta: timer set to 32000 ms
2020-06-19 09:44:38:483 flexisip-debug-Terminate SipEvent 0x556755ac8e80
2020-06-19 09:44:38:483 flexisip-debug-tport(0x556755aa7140): reset 
timer
2020-06-19 09:44:40:505 flexisip-debug-Call id 2432721524




When everything is working correctly I see this:




REGISTER sip:sip-server.example.com SIP/2.0
Via: SIP/2.0/TLS 
10.94.12.49:53437;alias;branch=z9hG4bK.PYyczzPIP;rport=46579;received=z.z.z.z
From: <sip:056XXXXXXXX@sip-server.example.com>;tag=wGxJiQDwA
To: sip:056XXXXXXXX@sip-server.example.com
CSeq: 20 REGISTER
Call-ID: KLTYlKZXQE
Max-Forwards: 69
Supported: replaces, outbound, gruu
Accept: application/sdp, text/plain, 
application/vnd.gsma.rcs-ft-http+xml
Contact: 
<sip:056XXXXXXXX@flexisip.example.com:5060;fs-conn-id=613eacdfdfbe933d;CtRt725eff5ac1e5fa8e=tls:sip-server.example.com>;+sip.instance="<urn:uuid:8094365d-a4a3-0023-8c07-272bb75a6203>";+org.linphone.specs="ephemeral,groupchat,lime"
Expires: 2147483647
User-Agent: SoftphoneiOS/1.0.13 () LinphoneSDK/4.4.0-alpha.169+6f910f0
Content-Length: 0
Path: <sips:flexisip.example.com:5061;fs-proxy-id=725eff5ac1e5fa8e;lr>
2020-06-19 09:46:26:875 flexisip-debug-Message is sent through an 
outgoing transaction.
2020-06-19 09:46:26:875 flexisip-debug-tport_tsend(0x56010de19e10) tpn = 
tls/x.x.x.x:5061
2020-06-19 09:46:26:875 flexisip-debug-tport_tls_writevec: vec 
0x56010de1ad10 0x56010de27760 978 (978)
2020-06-19 09:46:26:875 flexisip-debug-tport_tls_writevec: vec 
0x56010de1ad10 0x56010de2b908 2 (2)
2020-06-19 09:46:26:876 flexisip-debug-tport_vsend returned 980
2020-06-19 09:46:26:876 flexisip-debug-tport(0x56010de19e10): reset 
timer
2020-06-19 09:46:26:876 flexisip-debug-nta: sent REGISTER (20) to 
tls/x.x.x.x:5061
2020-06-19 09:46:26:876 flexisip-debug-tport_pend(0x56010de19e10): 
pending 0x56010de29130 for tls/x.x.x.x:5061 (already 0)
2020-06-19 09:46:26:876 flexisip-debug-Terminate SipEvent 0x56010de30980
2020-06-19 09:46:26:876 flexisip-debug-tport(0x56010de19b10): reset 
timer
2020-06-19 09:46:26:877 flexisip-debug-tport_wakeup(0x56010de19e10): 
events IN
2020-06-19 09:46:26:877 flexisip-debug-tport_recv_event(0x56010de19e10)
2020-06-19 09:46:26:877 flexisip-debug-tport_tls_recv(0x56010de19e10): 
tls_read() returned 779
2020-06-19 09:46:26:877 flexisip-debug-tport_recv_iovec(0x56010de19e10) 
msg 0x56010de27b70 from (tls/x.x.x.x:5061) has 779 bytes, veclen = 1
2020-06-19 09:46:26:877 flexisip-debug-tport_deliver(0x56010de19e10): 
msg 0x56010de27b70 (779 bytes) from tls/x.x.x.x:5061 next=(nil)
2020-06-19 09:46:26:877 flexisip-debug-nta: received 401 Unauthorized 
for REGISTER (20)
2020-06-19 09:46:26:877 flexisip-debug-nta: 401 Unauthorized is going to 
a transaction
2020-06-19 09:46:26:877 flexisip-debug-nta_outgoing: RTT is 1.959 ms
2020-06-19 09:46:26:877 flexisip-debug-tport_release(0x56010de19e10): 
0x56010de29130 by 0x56010de27040 with 0x56010de27b70
2020-06-19 09:46:26:877 flexisip-debug-OutgoingTransaction callback 
0x56010de2c710
2020-06-19 09:46:26:877 flexisip-debug-New SipEvent 0x56010de1e160 - 
0x56010de27b70
2020-06-19 09:46:26:877 flexisip-debug-Receiving new Response SIP 
message: 401
SIP/2.0 401 Unauthorized
Via: SIP/2.0/TLS 
flexisip.example.com;rport=44621;branch=z9hG4bK.mQtpK3mr28NQK7r1F8Q276FtFe;received=y.y.y.y
Via: SIP/2.0/TLS 
10.94.12.49:53437;alias;branch=z9hG4bK.PYyczzPIP;rport=46579;received=z.z.z.z
From: <sip:056XXXXXXXX@sip-server.example.com>;tag=wGxJiQDwA
To: <sip:056XXXXXXXX@sip-server.example.com>;tag=1mpQDDHK6QNZj
Call-ID: KLTYlKZXQE
CSeq: 20 REGISTER
User-Agent: FreeSWITCH
Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, 
REGISTER, REFER, PRACK, NOTIFY, PUBLISH, SUBSCRIBE
Supported: precondition, 100rel, timer, path, replaces
WWW-Authenticate: Digest realm="sip-server.example.com", 
nonce="f580ef7c-0be5-431f-a1f5-5a55157deb1b", algorithm=MD5, qop="auth"
Content-Length: 0

I noticed there's a "received 401 Unauthorized for REGISTER" but all 
appears to be working.

Any help would be really appreciated.

Thanks
Phil