OPTIONS sip:100@127.0.0.1 SIP/2.0
Via: SIP/2.0/UDP 127.0.1.1:5061;branch=z9hG4bK-487618168;rport
Max-Forwards: 70
To: "sipvicious"<sip:100@1.1.1.1>
From: "sipvicious"<sip:100@1.1.1.1>;tag=37663030303030313133633401393537303038303638
User-Agent: friendly-scanner
Call-ID: 447615548427934163033914
Contact: sip:100@127.0.1.1:5061
CSeq: 1 OPTIONS
Accept: application/sdp
Content-Length: 0

SIP/2.0 404 Not Found
Via: SIP/2.0/UDP 127.0.1.1:5060;rport=65476;received=185.179.142.180;branch=z9hG4bK-3692480612
Call-ID: 953932568039675157936807
From: "sipvicious" <sip:100@1.1.1.1>;tag=6239623338663563313363370134323538333932373936
To: "sipvicious" <sip:100@1.1.1.1>;tag=z9hG4bK-3692480612
CSeq: 1 OPTIONS
Accept: application/xpidf+xml, application/cpim-pidf+xml, application/dialog-info+xml, application/simple-message-summary, application/pidf+xml, application/pidf+xml, application/dialog-info+xml, application/s
ple-message-summary, application/sdp, message/sipfrag;version=2.0
Allow: OPTIONS, REGISTER, SUBSCRIBE, NOTIFY, PUBLISH, INVITE, ACK, BYE, CANCEL, UPDATE, PRACK, MESSAGE, REFER
Supported: 100rel, timer, replaces, norefersub
Accept-Encoding: identity
Accept-Language: en
Server: Asterisk PBX 18.9.0
Content-Length:  0