Thank you!
I’ve focused on going through things, step-by-step. I now have PBX-A successfully dialing PBX-B. The reverse, sadly, cannot be said. I’m pulling my hair out trying to understand how the “unauthorized” error is caused when PBX-B dials A.
Question (verification) #1: If I see “registered” (belwo) under registrations, that means PBX-A has successfully registered with PBX-B? Am I correct?
Question (verification) #2: If I see PBX-B under endpoints with an IP address (below), does that mean PBX-B has successfully registered with PBX-A?
Question #3: Below please find a cap of registration (PBX-B to A) and dial (auth) failure. Part of my confusion arises from the appearance of initial successful auth (from show reg. and endpts) followed by the dial auth fail. I would really like to understand what information I’m lacking in analyzing this (and, of course) why the call fails. As always, any help is sincerely appreciated!
I have both pjsip.conf and sip.conf to share upon request.
pjsip show registrations
<Registration/ServerURI..............................> <Auth..........> <Status.......>
==========================================================================================
PBX-B/sip:PBX-B-pubIPaddr:5060 PBX-B_auth Registered
flowroute/sip:us-east-va.sip.flowroute.com flowroute_auth Registered
pjsip show endpoints
~snip~
Endpoint: PBX-B Not in use 0 of inf
OutAuth: PBX-B_auth/PBX-A
InAuth: PBX-B_in_auth/PBX-B
Aor: PBX-B 1
Contact: PBX-B/sip:s@x.x.x.x:5060 60413ee16b NonQual nan
Contact: PBX-B/sip:x.x.x.x:5060 e7e1ce683d NonQual nan
Transport: transport-udp-nat udp 0 0 0.0.0.0:5060
Identify: PBX-B/PBX-B
Match: x.x.x.x/32
REGISTRATION capture ------------------------------
<--- Received SIP request (437 bytes from UDP:PBX-B-pubIPaddr:5060 --->
REGISTER sip:PBX-A-pvtIPaddr:5060 SIP/2.0
Via: SIP/2.0/UDP PBX-B-pubIPaddr:5060;branch=z9hG4bK3ca59963
Max-Forwards: 70
From: <sip:PBX-B@PBX-A-pvtIPaddr:5060>;tag=as2d4bb17f
To: <sip:PBX-B@PBX-A-pvtIPaddr:5060>
Call-ID: 54b7114f7db708ff624f310a1774a0e3@127.0.0.1
CSeq: 102 REGISTER
Supported: replaces, timer
User-Agent: Asterisk PBX 13.1.0~dfsg-1.1ubuntu4.1
Expires: 120
Contact: <sip:s@PBX-B-pubIPaddr:5060>
Content-Length: 0
<--- Transmitting SIP response (495 bytes) to UDP:PBX-B-pubIPaddr:5060 --->
SIP/2.0 401 Unauthorized
Via: SIP/2.0/UDP PBX-B-pubIPaddr:5060;rport=5060;received=PBX-B-pubIPaddr;branch=z9hG4bK3ca59963
Call-ID: 54b7114f7db708ff624f310a1774a0e3@127.0.0.1
From: <sip:PBX-B@PBX-A-pvtIPaddr>;tag=as2d4bb17f
To: <sip:PBX-B@PBX-A-pvtIPaddr>;tag=z9hG4bK3ca59963
CSeq: 102 REGISTER
WWW-Authenticate: Digest realm="asterisk",nonce="1746200686/3d59d22baa97795403d2a627d064b45b",opaque="5469bd491a2cfe16",algorithm=md5,qop="auth"
Server: Asterisk PBX 18.4.0
Content-Length: 0
<--- Received SIP request (707 bytes) from UDP:PBX-B-pubIPaddr:5060 --->
REGISTER sip:PBX-A-pvtIPaddr:5060 SIP/2.0
Via: SIP/2.0/UDP PBX-B-pubIPaddr:5060;branch=z9hG4bK1384a993
Max-Forwards: 70
From: <sip:PBX-B@PBX-A-pvtIPaddr:5060>;tag=as2d4bb17f
To: <sip:PBX-B@PBX-A-pvtIPaddr:5060>
Call-ID: 54b7114f7db708ff624f310a1774a0e3@127.0.0.1
CSeq: 103 REGISTER
Supported: replaces, timer
User-Agent: Asterisk PBX 13.1.0~dfsg-1.1ubuntu4.1
Authorization: Digest username="PBX-B", realm="asterisk", algorithm=MD5, uri="sip:PBX-A-IPaddr", nonce="1746200686/3d59d22baa97795403d2a627d064b45b", response="bcbef139fa399bac4805fd28cb0f3322", opaque="5469bd491a2cfe16", qop=auth, cnonce="1a1066bb", nc=00000001
Expires: 120
Contact: <sip:s@PBX-B-pubIPaddr:5060>
Content-Length: 0
<--- Transmitting SIP response (474 bytes) to UDP:PBX-B-pubIPaddr:5060 --->
SIP/2.0 200 OK
Via: SIP/2.0/UDP PBX-B-pubIPaddr:5060;rport=5060;received=PBX-B-pubIPaddr;branch=z9hG4bK1384a993
Call-ID: 54b7114f7db708ff624f310a1774a0e3@127.0.0.1
From: <sip:PBX-B@PBX-A-pvtIPaddr>;tag=as2d4bb17f
To: <sip:PBX-B@PBX-A-pvtIPaddr>;tag=z9hG4bK1384a993
CSeq: 103 REGISTER
Date: Fri, 02 May 2025 15:44:46 GMT
Contact: <sip:PBX-B-pubIPaddr:5060>
Contact: <sip:s@PBX-B-pubIPaddr:5060>;expires=119
Expires: 120
Server: Asterisk PBX 18.4.0
Content-Length: 0
<--- Transmitting SIP request (555 bytes) to UDP:PBX-B-pubIPaddr:5060 --->
REGISTER sip:PBX-B-pubIPaddr:5060 SIP/2.0
Via: SIP/2.0/UDP PBX-A-IPaddr:5060;rport;branch=z9hG4bKPjcf771f6a-83c3-4e8f-b961-841fa1963a99
From: <sip:PBX-A@PBX-A-IPaddr>;tag=53f85f52-d02c-4d79-aea6-188643687768
To: <sip:PBX-A@PBX-A-IPaddr>
Call-ID: 86e3dda5-ee5b-41c5-8b9d-cf7c3d357ad3
CSeq: 18084 REGISTER
Contact: <sip:s@PBX-A-IPaddr:5060>
Expires: 3600
Allow: OPTIONS, REGISTER, SUBSCRIBE, NOTIFY, PUBLISH, INVITE, ACK, BYE, CANCEL, UPDATE, PRACK, MESSAGE, REFER
Max-Forwards: 70
User-Agent: Asterisk PBX 18.4.0
Content-Length: 0
<--- Received SIP response (613 bytes) from UDP:PBX-B-pubIPaddr:5060 --->
SIP/2.0 401 Unauthorized
Via: SIP/2.0/UDP PBX-A-pvtIPaddr:5060;branch=z9hG4bKPjcf771f6a-83c3-4e8f-b961-841fa1963a99;received=PBX-A-pvtIPaddr;rport=5060
From: <sip:PBX-A@PBX-A-pvtIPaddr:5060>;tag=53f85f52-d02c-4d79-aea6-188643687768
To: <sip:PBX-A@PBX-A-pvtIPaddr:5060>;tag=as6cbae675
Call-ID: 86e3dda5-ee5b-41c5-8b9d-cf7c3d357ad3
CSeq: 18084 REGISTER
Server: Asterisk PBX 13.1.0~dfsg-1.1ubuntu4.1
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
Supported: replaces, timer
WWW-Authenticate: Digest algorithm=MD5, realm="asterisk", nonce="2a65984c"
Content-Length: 0
<--- Transmitting SIP request (723 bytes) to UDP:PBX-B-pubIPaddr:5060 --->
REGISTER sip:PBX-B-pubIPaddr:5060 SIP/2.0
Via: SIP/2.0/UDP PBX-A-IPaddr:5060;rport;branch=z9hG4bKPj94a1a2db-a63b-4237-839a-34a8b9175d0a
From: <sip:PBX-A@PBX-A-IPaddr>;tag=53f85f52-d02c-4d79-aea6-188643687768
To: <sip:PBX-A@PBX-A-IPaddr>
Call-ID: 86e3dda5-ee5b-41c5-8b9d-cf7c3d357ad3
CSeq: 18085 REGISTER
Contact: <sip:s@PBX-A-IPaddr:5060>
Expires: 3600
Allow: OPTIONS, REGISTER, SUBSCRIBE, NOTIFY, PUBLISH, INVITE, ACK, BYE, CANCEL, UPDATE, PRACK, MESSAGE, REFER
Max-Forwards: 70
User-Agent: Asterisk PBX 18.4.0
Authorization: Digest username="PBX-A", realm="asterisk", nonce="2a65984c", uri="sip:PBX-B-pubIPaddr:5060", response="87b24d8333ab1880db4fb9f5b05ed1f3", algorithm=MD5
Content-Length: 0
<--- Received SIP response (628 bytes) from UDP:PBX-B-pubIPaddr:5060 --->
SIP/2.0 200 OK
Via: SIP/2.0/UDP PBX-A-pvtIPaddr:5060;branch=z9hG4bKPj94a1a2db-a63b-4237-839a-34a8b9175d0a;received=PBX-A-pvtIPaddr;rport=5060
From: <sip:PBX-A@PBX-A-pvtIPaddr:5060>;tag=53f85f52-d02c-4d79-aea6-188643687768
To: <sip:PBX-A@PBX-A-pvtIPaddr:5060>;tag=as6cbae675
Call-ID: 86e3dda5-ee5b-41c5-8b9d-cf7c3d357ad3
CSeq: 18085 REGISTER
Server: Asterisk PBX 13.1.0~dfsg-1.1ubuntu4.1
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
Supported: replaces, timer
Expires: 3600
Contact: <sip:s@PBX-A-pvtIPaddr:5060>;expires=3600
Date: Fri, 02 May 2025 15:44:42 GMT
Content-Length: 0
---------------------------------------------------------
---------------------------------------------------------
Dial from PBX-B to PBX-A ----------------------------------------------------
<--- Received SIP request (868 bytes) from UDP:PBX-B-pubIPaddr:5060 --->
INVITE sip:PBX-A-ext@PBX-A-pvtIPaddr:5060 SIP/2.0
Via: SIP/2.0/UDP PBX-B-pubIPaddr:5060;branch=z9hG4bK4f949f55
Max-Forwards: 70
From: "PBX-B" <sip:PBX-B@PBX-B-pubIPaddr:5060>;tag=as01c94746
To: <sip:PBX-A-ext@PBX-A-pvtIPaddr:5060>
Contact: <sip:PBX-B@PBX-B-pubIPaddr:5060>
Call-ID: 472162d236667e383d9f996d5181a8b9@PBX-B-pubIPaddr:5060
CSeq: 102 INVITE
User-Agent: Asterisk PBX 13.1.0~dfsg-1.1ubuntu4.1
Date: Fri, 02 May 2025 15:46:49 GMT
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
Supported: replaces, timer
Content-Type: application/sdp
Content-Length: 257
v=0
o=root 269686395 269686395 IN IP4 PBX-B-pubIPaddr
s=Asterisk PBX 13.1.0~dfsg-1.1ubuntu4.1
c=IN IP4 PBX-B-pubIPaddr
t=0 0
m=audio 13848 RTP/AVP 0 101
a=rtpmap:0 PCMU/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=maxptime:150
a=sendrecv
<--- Transmitting SIP response (510 bytes) to UDP:PBX-B-pubIPaddr:5060 --->
SIP/2.0 401 Unauthorized
Via: SIP/2.0/UDP PBX-B-pubIPaddr:5060;rport=5060;received=PBX-B-pubIPaddr;branch=z9hG4bK4f949f55
Call-ID: 472162d236667e383d9f996d5181a8b9@PBX-B-pubIPaddr:5060
From: "PBX-B" <sip:PBX-B@PBX-B-pubIPaddr>;tag=as01c94746
To: <sip:PBX-A-ext@PBX-A-pvtIPaddr>;tag=z9hG4bK4f949f55
CSeq: 102 INVITE
WWW-Authenticate: Digest realm="asterisk",nonce="1746200809/8e4c756febf545ab46ffb6013a2ddd40",opaque="7a2f406759f302bc",algorithm=md5,qop="auth"
Server: Asterisk PBX 18.4.0
Content-Length: 0
<--- Received SIP request (435 bytes) from UDP:PBX-B-pubIPaddr:5060 --->
ACK sip:PBX-A-ext@PBX-A-pvtIPaddr:5060 SIP/2.0
Via: SIP/2.0/UDP PBX-B-pubIPaddr:5060;branch=z9hG4bK4f949f55
Max-Forwards: 70
From: "PBX-B" <sip:PBX-B@PBX-B-pubIPaddr:5060>;tag=as01c94746
To: <sip:PBX-A-ext@PBX-A-pvtIPaddr:5060>;tag=z9hG4bK4f949f55
Contact: <sip:PBX-B@PBX-B-pubIPaddr:5060>
Call-ID: 472162d236667e383d9f996d5181a8b9@PBX-B-pubIPaddr:5060
CSeq: 102 ACK
User-Agent: Asterisk PBX 13.1.0~dfsg-1.1ubuntu4.1
Content-Length: 0
<--- Received SIP request (1146 bytes) from UDP:PBX-B-pubIPaddr:5060 --->
INVITE sip:PBX-A-ext@PBX-A-pvtIPaddr:5060 SIP/2.0
Via: SIP/2.0/UDP PBX-B-pubIPaddr:5060;branch=z9hG4bK4c61a544
Max-Forwards: 70
From: "PBX-B" <sip:PBX-B@PBX-B-pubIPaddr:5060>;tag=as01c94746
To: <sip:PBX-A-ext@PBX-A-pvtIPaddr:5060>
Contact: <sip:PBX-B@PBX-B-pubIPaddr:5060>
Call-ID: 472162d236667e383d9f996d5181a8b9@PBX-B-pubIPaddr:5060
CSeq: 103 INVITE
User-Agent: Asterisk PBX 13.1.0~dfsg-1.1ubuntu4.1
Authorization: Digest username="PBX-A", realm="asterisk", algorithm=MD5, uri="sip:PBX-A-ext@PBX-A-IPaddr:5060", nonce="1746200809/8e4c756febf545ab46ffb6013a2ddd40", response="56b530541c4c5eceecc74b1efae4bf02", opaque="7a2f406759f302bc", qop=auth, cnonce="3f236d37", nc=00000001
Date: Fri, 02 May 2025 15:46:49 GMT
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
Supported: replaces, timer
Content-Type: application/sdp
Content-Length: 257
v=0
o=root 269686395 269686396 IN IP4 PBX-B-pubIPaddr
s=Asterisk PBX 13.1.0~dfsg-1.1ubuntu4.1
c=IN IP4 PBX-B-pubIPaddr
t=0 0
m=audio 13848 RTP/AVP 0 101
a=rtpmap:0 PCMU/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=maxptime:150
a=sendrecv
[May 2 11:46:49] NOTICE[170705]: res_pjsip/pjsip_distributor.c:676 log_failed_request: Request 'INVITE' from '"PBX-B" <sip:PBX-B@PBX-B-pubIPaddr>' failed for 'PBX-B-pubIPaddr:5060' (callid: 472162d236667e383d9f996d5181a8b9@PBX-B-pubIPaddr:5060) - Failed to authenticate
<--- Transmitting SIP response (510 bytes) to UDP:PBX-B-pubIPaddr:5060 --->
SIP/2.0 401 Unauthorized
Via: SIP/2.0/UDP PBX-B-pubIPaddr:5060;rport=5060;received=PBX-B-pubIPaddr;branch=z9hG4bK4c61a544
Call-ID: 472162d236667e383d9f996d5181a8b9@PBX-B-pubIPaddr:5060
From: "PBX-B" <sip:PBX-B@PBX-B-pubIPaddr>;tag=as01c94746
To: <sip:PBX-A-ext@PBX-A-pvtIPaddr>;tag=z9hG4bK4c61a544
CSeq: 103 INVITE
WWW-Authenticate: Digest realm="asterisk",nonce="1746200809/8e4c756febf545ab46ffb6013a2ddd40",opaque="0d9f52793266fa11",algorithm=md5,qop="auth"
Server: Asterisk PBX 18.4.0
Content-Length: 0
<--- Received SIP request (435 bytes) from UDP:PBX-B-pubIPaddr:5060 --->
ACK sip:PBX-A-ext@PBX-A-pvtIPaddr:5060 SIP/2.0
Via: SIP/2.0/UDP PBX-B-pubIPaddr:5060;branch=z9hG4bK4c61a544
Max-Forwards: 70
From: "PBX-B" <sip:PBX-B@PBX-B-pubIPaddr:5060>;tag=as01c94746
To: <sip:PBX-A-ext@PBX-A-pvtIPaddr:5060>;tag=z9hG4bK4c61a544
Contact: <sip:PBX-B@PBX-B-pubIPaddr:5060>
Call-ID: 472162d236667e383d9f996d5181a8b9@PBX-B-pubIPaddr:5060
CSeq: 103 ACK
User-Agent: Asterisk PBX 13.1.0~dfsg-1.1ubuntu4.1
Content-Length: 0
<--- Received SIP request (1146 bytes) from UDP:PBX-B-pubIPaddr:5060 --->
INVITE sip:PBX-A-ext@PBX-A-pvtIPaddr:5060 SIP/2.0
Via: SIP/2.0/UDP PBX-B-pubIPaddr:5060;branch=z9hG4bK59cc978e
Max-Forwards: 70
From: "PBX-B" <sip:PBX-B@PBX-B-pubIPaddr:5060>;tag=as01c94746
To: <sip:PBX-A-ext@PBX-A-pvtIPaddr:5060>
Contact: <sip:PBX-B@PBX-B-pubIPaddr:5060>
Call-ID: 472162d236667e383d9f996d5181a8b9@PBX-B-pubIPaddr:5060
CSeq: 104 INVITE
User-Agent: Asterisk PBX 13.1.0~dfsg-1.1ubuntu4.1
Authorization: Digest username="PBX-A", realm="asterisk", algorithm=MD5, uri="sip:PBX-A-ext@PBX-A-IPaddr:5060", nonce="1746200809/8e4c756febf545ab46ffb6013a2ddd40", response="0cf8a15685860220b5e316a0e69d24d7", opaque="0d9f52793266fa11", qop=auth, cnonce="59e03c64", nc=00000002
Date: Fri, 02 May 2025 15:46:49 GMT
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
Supported: replaces, timer
Content-Type: application/sdp
Content-Length: 257
v=0
o=root 269686395 269686397 IN IP4 PBX-B-pubIPaddr
s=Asterisk PBX 13.1.0~dfsg-1.1ubuntu4.1
c=IN IP4 PBX-B-pubIPaddr
t=0 0
m=audio 13848 RTP/AVP 0 101
a=rtpmap:0 PCMU/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=maxptime:150
a=sendrecv
[May 2 11:46:49] NOTICE[170705]: res_pjsip/pjsip_distributor.c:676 log_failed_request: Request 'INVITE' from '"PBX-B" <sip:PBX-B@PBX-B-pubIPaddr>' failed for 'PBX-B-pubIPaddr:5060' (callid: 472162d236667e383d9f996d5181a8b9@PBX-B-pubIPaddr:5060) - Failed to authenticate
<--- Transmitting SIP response (510 bytes) to UDP:PBX-B-pubIPaddr:5060 --->
SIP/2.0 401 Unauthorized
Via: SIP/2.0/UDP PBX-B-pubIPaddr:5060;rport=5060;received=PBX-B-pubIPaddr;branch=z9hG4bK59cc978e
Call-ID: 472162d236667e383d9f996d5181a8b9@PBX-B-pubIPaddr:5060
From: "PBX-B" <sip:PBX-B@PBX-B-pubIPaddr>;tag=as01c94746
To: <sip:PBX-A-ext@PBX-A-pvtIPaddr>;tag=z9hG4bK59cc978e
CSeq: 104 INVITE
WWW-Authenticate: Digest realm="asterisk",nonce="1746200809/8e4c756febf545ab46ffb6013a2ddd40",opaque="0642391d676725e2",algorithm=md5,qop="auth"
Server: Asterisk PBX 18.4.0
Content-Length: 0
<--- Received SIP request (435 bytes) from UDP:PBX-B-pubIPaddr:5060 --->
ACK sip:PBX-A-ext@PBX-A-pvtIPaddr:5060 SIP/2.0
Via: SIP/2.0/UDP PBX-B-pubIPaddr:5060;branch=z9hG4bK59cc978e
Max-Forwards: 70
From: "PBX-B" <sip:PBX-B@PBX-B-pubIPaddr:5060>;tag=as01c94746
To: <sip:PBX-A-ext@PBX-A-pvtIPaddr:5060>;tag=z9hG4bK59cc978e
Contact: <sip:PBX-B@PBX-B-pubIPaddr:5060>
Call-ID: 472162d236667e383d9f996d5181a8b9@PBX-B-pubIPaddr:5060
CSeq: 104 ACK
User-Agent: Asterisk PBX 13.1.0~dfsg-1.1ubuntu4.1
Content-Length: 0
<--- Received SIP request (1146 bytes) from UDP:PBX-B-pubIPaddr:5060 --->
INVITE sip:PBX-A-ext@PBX-A-pvtIPaddr:5060 SIP/2.0
Via: SIP/2.0/UDP PBX-B-pubIPaddr:5060;branch=z9hG4bK6ebfd54e
Max-Forwards: 70
From: "PBX-B" <sip:PBX-B@PBX-B-pubIPaddr:5060>;tag=as01c94746
To: <sip:PBX-A-ext@PBX-A-pvtIPaddr:5060>
Contact: <sip:PBX-B@PBX-B-pubIPaddr:5060>
Call-ID: 472162d236667e383d9f996d5181a8b9@PBX-B-pubIPaddr:5060
CSeq: 105 INVITE
User-Agent: Asterisk PBX 13.1.0~dfsg-1.1ubuntu4.1
Authorization: Digest username="PBX-A", realm="asterisk", algorithm=MD5, uri="sip:PBX-A-ext@PBX-A-IPaddr:5060", nonce="1746200809/8e4c756febf545ab46ffb6013a2ddd40", response="76d399c8c2b173a4c3390d11bb0203e2", opaque="0642391d676725e2", qop=auth, cnonce="770db6b3", nc=00000003
Date: Fri, 02 May 2025 15:46:49 GMT
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
Supported: replaces, timer
Content-Type: application/sdp
Content-Length: 257
v=0
o=root 269686395 269686398 IN IP4 PBX-B-pubIPaddr
s=Asterisk PBX 13.1.0~dfsg-1.1ubuntu4.1
c=IN IP4 PBX-B-pubIPaddr
t=0 0
m=audio 13848 RTP/AVP 0 101
a=rtpmap:0 PCMU/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=maxptime:150
a=sendrecv
[May 2 11:46:49] NOTICE[170705]: res_pjsip/pjsip_distributor.c:676 log_failed_request: Request 'INVITE' from '"PBX-B" <sip:PBX-B@PBX-B-pubIPaddr>' failed for 'PBX-B-pubIPaddr:5060' (callid: 472162d236667e383d9f996d5181a8b9@PBX-B-pubIPaddr:5060) - Failed to authenticate
<--- Transmitting SIP response (510 bytes) to UDP:PBX-B-pubIPaddr:5060 --->
SIP/2.0 401 Unauthorized
Via: SIP/2.0/UDP PBX-B-pubIPaddr:5060;rport=5060;received=PBX-B-pubIPaddr;branch=z9hG4bK6ebfd54e
Call-ID: 472162d236667e383d9f996d5181a8b9@PBX-B-pubIPaddr:5060
From: "PBX-B" <sip:PBX-B@PBX-B-pubIPaddr>;tag=as01c94746
To: <sip:PBX-A-ext@PBX-A-pvtIPaddr>;tag=z9hG4bK6ebfd54e
CSeq: 105 INVITE
WWW-Authenticate: Digest realm="asterisk",nonce="1746200809/8e4c756febf545ab46ffb6013a2ddd40",opaque="219ec2566bce5914",algorithm=md5,qop="auth"
Server: Asterisk PBX 18.4.0
Content-Length: 0
<--- Received SIP request (435 bytes) from UDP:PBX-B-pubIPaddr:5060 --->
ACK sip:PBX-A-ext@PBX-A-pvtIPaddr:5060 SIP/2.0
Via: SIP/2.0/UDP PBX-B-pubIPaddr:5060;branch=z9hG4bK6ebfd54e
Max-Forwards: 70
From: "PBX-B" <sip:PBX-B@PBX-B-pubIPaddr:5060>;tag=as01c94746
To: <sip:PBX-A-ext@PBX-A-pvtIPaddr:5060>;tag=z9hG4bK6ebfd54e
Contact: <sip:PBX-B@PBX-B-pubIPaddr:5060>
Call-ID: 472162d236667e383d9f996d5181a8b9@PBX-B-pubIPaddr:5060
CSeq: 105 ACK
User-Agent: Asterisk PBX 13.1.0~dfsg-1.1ubuntu4.1
Content-Length: 0