VPN (IKE)

Initiator SPI: 7031617934707371
Responder SPI: 67666f6d39676575
Next Payload: Notification (N)
Version: 1.0
Exchange Type: Informational
Flags:
    Encryption:     False
    Commit:         False
    Authentication: False
Message ID: 00000000
Length: 40

SIP/2.0 404 Not Found
From: <sip:nm@nm>;tag=root
To: <sip:nm2@nm2>;tag=1105000-0-13c4-50029-b6b29-5b15f89d-b6b29
Call-ID: 50000
CSeq: 42 OPTIONS
Via: SIP/2.0/UDP nm;received=224.217.18.227;rport=26810;branch=foo
Supported: replaces,100rel,timer
Accept: application/sdp
Allow: INVITE,ACK,CANCEL,BYE,OPTIONS,REFER,INFO,NOTIFY,PRACK,MESSAGE
Content-Length: 0