<<<<---- start usefull debug here ---->>>>

[May 24 10:45:21] DEBUG[3153] chan_sip.c: REGISTER attempt 2 to [userPROXY]@[URLPROXY]
[May 24 10:45:21] VERBOSE[3153] chan_sip.c: Reliably Transmitting (NAT) to [PROXYIP]:5060:
ŚREGISTER sip:[URLPROXY] SIP/2.0
ŚVia: SIP/2.0/UDP [LOCALIP]:5060;branch=z9hG4bK4baff94a;rport
ŚMax-Forwards: 70
ŚFrom: <sip:[userPROXY]@[URLPROXY]>;tag=as3f74ce81
ŚTo: <sip:[userPROXY]@[URLPROXY]>
ŚCall-ID: 2b2089f451194cb444a06dd754800f20@127.0.1.1
ŚCSeq: 151 REGISTER
ŚSupported: replaces, timer
ŚUser-Agent: Asterisk PBX 12.2.0
ŚAuthorization: Digest username="[userPROXY]", realm="[URLPROXY]", algorithm=MD5, uri="sip:[URLPROXY]", nonce="5381369237b67cc001eaaf8f168a3b997278ab4d", response="840042b9e7032b031708de0e139ce598"
ŚExpires: 120
ŚContact: <sip:5268@[LOCALIP]:5060>
ŚContent-Length: 0
Ś
Ś
Ś---
[May 24 10:45:21] DEBUG[3153] chan_sip.c: *** SIP TIMER: Initializing retransmit timer on packet: Id  #249
[May 24 10:45:21] DEBUG[3153] chan_sip.c: Trying to put 'REGISTER si' onto UDP socket destined for [PROXYIP]:5060
[May 24 10:45:21] VERBOSE[3153] chan_sip.c:
Ś<--- SIP read from UDP:[PROXYIP]:5060 --->
ŚSIP/2.0 200 OK
ŚVia: SIP/2.0/UDP [LOCALIP]:5060;received=[EXTERNALIP];branch=z9hG4bK4baff94a;rport=5060
ŚFrom: <sip:[userPROXY]@[URLPROXY]>;tag=as3f74ce81
ŚTo: <sip:[userPROXY]@[URLPROXY]>;tag=a910c8153188470b2841623c513a131f.b31c
ŚCall-ID: 2b2089f451194cb444a06dd754800f20@127.0.1.1
ŚCSeq: 151 REGISTER
ŚContact: <sip:5268@[LOCALIP]:5060>;expires=120;received="sip:[EXTERNALIP]:5060"
ŚServer: OpenSIPS (1.8.2-tls (i386/linux))
ŚContent-Length: 0
Ś
Ś<------------->
[May 24 10:45:21] DEBUG[3153] chan_sip.c:  Header  0 [ 14]: SIP/2.0 200 OK
[May 24 10:45:21] DEBUG[3153] chan_sip.c:  Header  1 [ 91]: Via: SIP/2.0/UDP [LOCALIP]:5060;received=[EXTERNALIP];branch=z9hG4bK4baff94a;rport=5060
[May 24 10:45:21] DEBUG[3153] chan_sip.c:  Header  2 [ 43]: From: <sip:[userPROXY]@[URLPROXY]>;tag=as3f74ce81
[May 24 10:45:21] DEBUG[3153] chan_sip.c:  Header  3 [ 68]: To: <sip:[userPROXY]@[URLPROXY]>;tag=a910c8153188470b2841623c513a131f.b31c
[May 24 10:45:21] DEBUG[3153] chan_sip.c:  Header  4 [ 51]: Call-ID: 2b2089f451194cb444a06dd754800f20@127.0.1.1
[May 24 10:45:21] DEBUG[3153] chan_sip.c:  Header  5 [ 18]: CSeq: 151 REGISTER
[May 24 10:45:21] DEBUG[3153] chan_sip.c:  Header  6 [ 83]: Contact: <sip:5268@[LOCALIP]:5060>;expires=120;received="sip:[EXTERNALIP]:5060"
[May 24 10:45:21] DEBUG[3153] chan_sip.c:  Header  7 [ 41]: Server: OpenSIPS (1.8.2-tls (i386/linux))
[May 24 10:45:21] DEBUG[3153] chan_sip.c:  Header  8 [ 17]: Content-Length: 0
[May 24 10:45:21] VERBOSE[3153] chan_sip.c: --- (9 headers 0 lines) ---
[May 24 10:45:21] DEBUG[3153] chan_sip.c: = Looking for  Call ID: 2b2089f451194cb444a06dd754800f20@127.0.1.1 (Checking To) --From tag as3f74ce81 --To-tag a910c8153188470b2841623c513a131f.b31c
[May 24 10:45:21] DEBUG[3153] chan_sip.c: ** SIP TIMER: Cancelling retransmit of packet (reply received) Retransid #249
[May 24 10:45:21] DEBUG[3153] chan_sip.c: Stopping retransmission on '2b2089f451194cb444a06dd754800f20@127.0.1.1' of Request 151: Match Found
[May 24 10:45:21] DEBUG[3153] chan_sip.c: Registration successful
[May 24 10:45:21] DEBUG[3153] chan_sip.c: Cancelling timeout 247
[May 24 10:45:21] DEBUG[3153] chan_sip.c: SIP Registry [URLPROXY]: refcount now 2
[May 24 10:45:21] DEBUG[3153] chan_sip.c: SIP Registry [URLPROXY]: refcount now 1
[May 24 10:45:21] NOTICE[3153] chan_sip.c: Outbound Registration: Expiry for [URLPROXY] is 120 sec (Scheduling reregistration in 105 s)
[May 24 10:45:21] DEBUG[3153] chan_sip.c: SIP Registry [URLPROXY]: refcount now 2
[May 24 10:45:21] DEBUG[3153] chan_sip.c: Destroying SIP dialog 2b2089f451194cb444a06dd754800f20@127.0.1.1
[May 24 10:45:21] VERBOSE[3153] chan_sip.c: Really destroying SIP dialog '2b2089f451194cb444a06dd754800f20@127.0.1.1' Method: REGISTER

[May 24 10:45:22] VERBOSE[3153] chan_sip.c:
<<<<---- continue with OPTIONS and 200/OK between proxy and asterisk ---->>>>