<--- Transmitting SIP request (1068 bytes) to UDP:77.72.169.131:5060 --->
INVITE sip:[email protected] SIP/2.0
Via: SIP/2.0/UDP meineip:5060;rport;branch=z9hG4bKPjcd168d2c-5cd0-494d-8230-6f3e04937025
From: <sip:[email protected]>;tag=a5a0615e-fcd4-40d8-ad39-1bfeaceb2ac7
To: <sip:[email protected]>
Contact: <sip:meinusername@meineip:5060>
Call-ID: b8a1d185-8f33-47ca-9851-330525b4b2f1
CSeq: 15133 INVITE
Allow: OPTIONS, REGISTER, SUBSCRIBE, NOTIFY, PUBLISH, INVITE, ACK, BYE, CANCEL, UPDATE, PRACK, MESSAGE, REFER
Supported: 100rel, timer, replaces, norefersub
Session-Expires: 1800
Min-SE: 90
Max-Forwards: 70
User-Agent: Asterisk PBX 16.2.1~dfsg-1+deb10u2
Content-Type: application/sdp
Content-Length: 371
...
<--- Received SIP response (473 bytes) from UDP:77.72.169.131:5060 --->
SIP/2.0 400 Bad request
Via: SIP/2.0/UDP meineip:5060;rport;branch=z9hG4bKPjcd168d2c-5cd0-494d-8230-6f3e04937025
From: <sip:[email protected]>;tag=a5a0615e-fcd4-40d8-ad39-1bfeaceb2ac7
To: <sip:[email protected]>
Contact: sip:77.72.169.131:5060
Call-ID: b8a1d185-8f33-47ca-9851-330525b4b2f1
CSeq: 15133 INVITE
Server: (Very nice Sip Registrar/Proxy Server)
Allow: ACK,BYE,CANCEL,INVITE,REGISTER,OPTIONS,INFO,MESSAGE
Content-Length: 0