HTTP/1.1 401 Unauthorized
Content-Length: 0
WWW-Authenticate: Digest realm="IgdAuthentication", domain="/", nonce="ZTM1MDA5ZmE6ODIzNDQyZTE6YTU3MWU0OGI=", qop="auth", algorithm=MD5, opaque="5ccc09c403ebaf9f0171e9517f40e41" 

HTTP/1.1 401 Unauthorized
Content-Length: 0
WWW-Authenticate: Digest realm="IgdAuthentication", domain="/", nonce="ZTk0YzE1ZTU6ZDAxMmYwZDE6MjkzNzA3Yjg=", qop="auth", algorithm=MD5, opaque="5ccc09c403ebaf9f0171e9517f40e41"