HTTP/1.1 401 Unauthorized
Content-Length: 0
WWW-Authenticate: Digest realm="IgdAuthentication", domain="/", nonce="ODYxMDNlMjM6NzRhOWM3ZDk6ZGU1ZmM1N2E=", qop="auth", algorithm=MD5, opaque="5ccc09c403ebaf9f0171e9517f40e41" 

HTTP/1.1 401 Unauthorized
Content-Length: 0
WWW-Authenticate: Digest realm="IgdAuthentication", domain="/", nonce="YWMxOTUwM2U6ZTcyNWViNTg6N2QyMjJjODA=", qop="auth", algorithm=MD5, opaque="5ccc09c403ebaf9f0171e9517f40e41"