GET http://localhost:1212/signalr//negotiate?clientProtocol=1.5&connectionData=%5B%7B%22name%22%3A%22writerverificationhub%22%7D%5D&_=1502489705343 HTTP/1.1 Origin: http://localhost:4200 Referer: http://localhost:4200/Admin Accept-Language: en-US User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36 Edge/15.15063 Content-Type: application/x-www-form-urlencoded; charset=UTF-8 Accept: text/plain, */*; q=0.01 Accept-Encoding: gzip, deflate Host: localhost:1212 Connection: Keep-Alive Cookie: VERSION=2.0.0.159 HTTP/1.1 401 Unauthorized Content-Length: 0 Server: Microsoft-HTTPAPI/2.0 WWW-Authenticate: NTLM Date: Fri, 11 Aug 2017 22:15:14 GMT Proxy-Support: Session-Based-Authentication