POST https://myhost/WCFPOC/Service1.svc HTTP/1.1
Content-Type: text/xml; charset=utf-8
SOAPAction: "http://test/MyService/IService1/GetData"
Host: myhost
Content-Length: 1028
Expect: 100-continue
Accept-Encoding: gzip, deflate
Connection: Keep-Alive

...

HTTP/1.1 401 Unauthorized
Cache-Control: private
Server: Microsoft-IIS/8.5
X-AspNet-Version: 4.0.30319
WWW-Authenticate: Negotiate
WWW-Authenticate: NTLM
X-Powered-By: ASP.NET
Date: Fri, 27 Mar 2015 23:42:05 GMT
Content-Length: 0
Proxy-Support: Session-Based-Authentication

POST https://myhost/WCFPOC/Service1.svc HTTP/1.1
Content-Type: text/xml; charset=utf-8
SOAPAction: "http://test/MyService/IService1/GetData"
Accept-Encoding: gzip, deflate
Authorization: Negotiate YHUGBisGAQUFAqBrMGmgMDAuBgorBgEEAYI3AgIKBgkqhkiC9xIBAgIGCSqGSIb3EgECAgYKKwYBBAGCNwICHqI1BDNOVExNU1NQAAEAAACXshjiAwADADAAAAAIAAgAKAAAAAYDgCUAAAAPQ1BSSUFEQzFJSEE=
Host: myhost
Content-Length: 0

HTTP/1.1 401 Unauthorized
Content-Type: text/html; charset=us-ascii
Server: Microsoft-HTTPAPI/2.0
WWW-Authenticate: Negotiate oYIBDTCCAQmgAwoBAaEMBgorBgEEAYI3AgIKooHzBIHwTlRMTVNTUAACAAAABgAGADgAAAAVwpni2AS6fiQfZLpwPaJe4wAAALIAsgA+AAAABgOAJQAAAA9JAEgAQQACAAYASQBIAEEAAQAQAEMAUABSAEkAQQBEAEMAMQAEACIAaQBuAHQAZQByAGkAbwByAGgAZQBhAGwAdABoAC4AYwBhAAMANABDAFAAUgBJAEEARABDADEALgBpAG4AdABlAHIAaQBvAHIAaABlAGEAbAB0AGgALgBjAGEABQAiAGkAbgB0AGUAcgBpAG8AcgBoAGUAYQBsAHQAaAAuAGMAYQAHAAgAc+yXoedo0AEAAAAA
Date: Fri, 27 Mar 2015 23:42:05 GMT
Content-Length: 341
Proxy-Support: Session-Based-Authentication

...

POST https://myhost/WCFPOC/Service1.svc HTTP/1.1
Content-Type: text/xml; charset=utf-8
SOAPAction: "http://test/MyService/IService1/GetData"
Accept-Encoding: gzip, deflate
Authorization: Negotiate oXcwdaADCgEBoloEWE5UTE1TU1AAAwAAAAAAAABYAAAAAAAAAFgAAAAAAAAAWAAAAAAAAABYAAAAAAAAAFgAAAAAAAAAWAAAABXCmOIGA4AlAAAAD5YQGFSH1V64XZ2JAv3qnE+jEgQQAQAAAPUXp1AtIpqEAAAAAA==
Host: myhost
Content-Length: 1028
Expect: 100-continue

...

HTTP/1.1 200 OK
Cache-Control: private
Content-Length: 607
Content-Type: text/xml; charset=utf-8
Server: Microsoft-IIS/8.5
X-AspNet-Version: 4.0.30319
Persistent-Auth: true
X-Powered-By: ASP.NET
WWW-Authenticate: Negotiate oRswGaADCgEAoxIEEAEAAABDh+CIwTbjqQAAAAA=
Date: Fri, 27 Mar 2015 23:42:07 GMT

...