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When running a website localy on IIS every request requires NTLM authentication over again.

When running on server it's not as bad, but still requests more than once for a batch of requests all used for loading one page.

I found a question which is Similar, but different.

My requests have Connection: keep-alive

All requests have ASP.NET_SessionId set to same value, why would some need authentication while others don't?

Trying to make sense of it...

Community
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JNF
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1 Answers1

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This can occur if AuthPersistSingleRequest=False or if the tcp connection is initiated from a different source port on the client. If subsequent connections originate from a different port, it will result in a new challenge.

http://blogs.msdn.com/b/saurabh_singh/archive/2010/01/06/case-study-are-you-seeing-401-s-too-often-for-http-web-requests.aspx

Greg Askew
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