REGISTER sip:127.0.0.1 SIP/2.0
Via: SIP/2.0/UDP 172.17.13.240:5061;rport;branch=z9hG4bKydcnjlpe
Max-Forwards: 70
To: <sip:1000@127.0.0.1>
From: <sip:1000@127.0.0.1>;tag=dyggg
Call-ID: ccgdnpeqtepegxu@172.17.13.240
CSeq: 479 REGISTER
Contact: <sip:1000@172.17.13.240:5061>;expires=3600
Allow: INVITE,ACK,BYE,CANCEL,OPTIONS,PRACK,REFER,NOTIFY,SUBSCRIBE,INFO
User-Agent: Twinkle/1.0
Content-Length: 0