HTTP/1.1 401 Unauthorized
WWW-Authenticate: Digest realm="snom", qop="auth", nonce="4931f1ee7fc749aec92f299ecc9f770b", opaque="03d04bebba3f4dd06f099975514c8488"
Content-Type: text/plain
Content-Length: 22

VPN (IKE)

Initiator SPI: 316e3436666b6465
Responder SPI: 3863697569386763
Next Payload: RESERVED
Version: 2.0
Exchange Type: DOI Specific Use
Flags:
    Encryption:     False
    Commit:         False
    Authentication: False
Message ID: 00000000
Length: 36