.NET Remoting failed with HTTP 401.5 from IIS 5.0 with NTLM

From: Sin Min (anonymous_at_discussions.microsoft.com)
Date: 04/27/04 

Date: Tue, 27 Apr 2004 03:16:02 -0700

Good day!

Scenario
----------
Win2k Adv Svr + SP4 + UrlScan + NTLM only (No Anonymous allowed)

Internet <--- resp/ req ---> WebSvr <--- .NET 1.1 Remoting ---> AppSvr (Remote objects in IIS)

As far as I know, the first call to the remote object will failed with HTTP 401.5 before the second try will succeed with HTTP 200 due to NTLM nature.

However, if every call to the remote object returns HTTP 401.5, will it cause the AppSvr to be hung? I noticed from IIS log on the AppSvr that there was a series of HTTP 401.5 before HTTP 500 was returned finally. This event only occured around 10 minutes before the AppSvr is back to normal operation.

Any idea?

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