EPMFAQ
Project Server Help, FAQs, Blogs, and HowTos
This is The Header Then

“Internet Explorer cannot display the Web Page” error when signing in to SharePoint 3.0 using Windows Authentication

posted June 20th, 2008 by Stephen Sanderlin
1 Star2 Stars3 Stars4 Stars5 Stars (1 votes, average: 5 out of 5)
Loading ... Loading ...

I recently encountered a situation where users attempting to login to a SharePoint 3.0 site when using the “Sign In” link were recieving an “Internet Explorer cannot display the Web Page” error. The Web Application was configured to allow Anonymous Access and to also use Integrated Windows Authentication.

No errors showed in either the Application or System logs. The IIS Logs displayed a 401 error:
2008-06-20 14:55:01 W3SVC96982807 ServerIP GET /_layouts/Authenticate.aspx Source=%2Fdefault%2Easpx 80 - ClientIP Mozilla/4.0+(BrowserIdentificationString) 401 1 0. Examination of the HTTP traffic with Fiddler showed the same 401.1 error.

Investigation of the Web Site’s properties in IIS showed that HTTP Keep-Alives were disabled — enabling them resolved the problem.

Integrated Windows Authentication (NTLM) requires HTTP Keep-Alives; this is because Microsoft’s NTLM for HTTP authenticates connections, not requests. This means that the HTTP connection must be kept open while the NTLM handshake completes. More technical information can be found here. There is no method that I know of to get around this limitation other than to not use NTLM.


Stephen Sanderlin is Vice President of Technology for MSProjectExperts and a Microsoft Project MVP. His earlier writings on Project Management and Microsoft Project can be read at EPMFAQ.
He is actively posting new content at ProjectServerHelp.

Popularity: 89%




Discuss this post on the EPMFAQ Blog Posts Forum.


Related Posts

  • No Related Posts



« Previous Entry Next Entry »

Please discuss this post on the EPMFAQ Blog Posts Forum.

4 Responses to ““Internet Explorer cannot display the Web Page” error when signing in to SharePoint 3.0 using Windows Authentication”


  1. […] can read the rest of this blog post by going to the original source, here […]


  2. […] Go to the author’s original blog: “Internet Explorer cannot display the Web Page” error when signing … […]


  3. […] InternetExplorer cannot display the Web Page error when signing… […]


  4. […] InternetExplorer cannot display the Web Page error when signing… […]


The opinions expressed on this site by the authors and those providing comments are theirs alone, and do not reflect the opinions of the respective employers of the authors or any employee thereof. Our respective employers are not responsible for the accuracy of any of the information supplied by on this site.

Terms of Use | Privacy Policy | Publishers

All content on this website is covered by the
Creative Commons Attribution-Share Alike 3.0 United States License.
Theme ©2007 The Heckerped WordPress Theme created by JTk of Doc5 under the Creative Commons Attribution License.