Исправление sunny1983, (текущая версия) :
версия tcpdump если что - 4.1-PRE-CVS_2016_05_10
А вообще я сам вижу в man, что написано
-A Print each packet (minus its link level header) in ASCII. Handy for capturing web pages.
IP 192.168.170.5.5060 > 10.0.1.2.5060: SIP, length: 530
E.......<.......
...........OPTIONS sip:10.0.1.2 SIP/2.0
Via: SIP/2.0/UDP 192.168.170.5:5060;branch=z9hG4bK709e7c39;rport
Max-Forwards: 70
From: "Unknown" <sip:Unknown@192.168.170.5>;tag=as0938f447
To: <sip:10.0.1.2>
Contact: <sip:Unknown@192.168.170.5:5060>
Call-ID: 056285aa7a39efcd605cca5c217edbb6@192.168.170.5:5060
CSeq: 102 OPTIONS
User-Agent: FPBX-2.11.0(11.12.0)
Date: Sat, 12 Feb 2022 07:07:46 GMT
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
Supported: replaces, timer
Content-Length: 0
IP 10.0.1.2.5060 > 192.168.170.5.5060: SIP, length: 475
E...j...@...
.............w.SIP/2.0 404 Not Found
Via: SIP/2.0/UDP 192.168.170.5:5060;branch=z9hG4bK709e7c39;received=192.168.170.5;rport=5060
From: "Unknown" <sip:Unknown@192.168.170.5>;tag=as0938f447
To: <sip:10.0.1.2>;tag=as71c75350
Call-ID: 056285aa7a39efcd605cca5c217edbb6@192.168.170.5:5060
CSeq: 102 OPTIONS
Server: CCM4.0
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
Supported: replaces, timer
Accept: application/sdp
Content-Length: 0
Исходная версия sunny1983, :
версия version если что - 4.1-PRE-CVS_2016_05_10
А вообще я сам вижу в man, что написано
-A Print each packet (minus its link level header) in ASCII. Handy for capturing web pages.
IP 192.168.170.5.5060 > 10.0.1.2.5060: SIP, length: 530
E.......<.......
...........OPTIONS sip:10.0.1.2 SIP/2.0
Via: SIP/2.0/UDP 192.168.170.5:5060;branch=z9hG4bK709e7c39;rport
Max-Forwards: 70
From: "Unknown" <sip:Unknown@192.168.170.5>;tag=as0938f447
To: <sip:10.0.1.2>
Contact: <sip:Unknown@192.168.170.5:5060>
Call-ID: 056285aa7a39efcd605cca5c217edbb6@192.168.170.5:5060
CSeq: 102 OPTIONS
User-Agent: FPBX-2.11.0(11.12.0)
Date: Sat, 12 Feb 2022 07:07:46 GMT
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
Supported: replaces, timer
Content-Length: 0
IP 10.0.1.2.5060 > 192.168.170.5.5060: SIP, length: 475
E...j...@...
.............w.SIP/2.0 404 Not Found
Via: SIP/2.0/UDP 192.168.170.5:5060;branch=z9hG4bK709e7c39;received=192.168.170.5;rport=5060
From: "Unknown" <sip:Unknown@192.168.170.5>;tag=as0938f447
To: <sip:10.0.1.2>;tag=as71c75350
Call-ID: 056285aa7a39efcd605cca5c217edbb6@192.168.170.5:5060
CSeq: 102 OPTIONS
Server: CCM4.0
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
Supported: replaces, timer
Accept: application/sdp
Content-Length: 0