How to capture memory dumps when a specific event log occurs using new Event Log feature.

I came across a new feature (well new to me) in the Event Viewer in Windows 7 (also in Vista and Windows Server 2008) recently that can be useful in troubleshooting various issues.  The new Event Viewer now allows you to attach a task to a particular event which will be launched automatically when a matching event…


Loopback Security Check Feature IIS 7

I recently had a support case where the user was not able to browse to his web site from the web server itself.  He was getting prompted for credentials 3 times and after entering valid credentials each time he received a 401.1 Logon Failed Error.  We checked the site and it was using Windows Integrated Authentication and we confirmed that…

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HTTP 413 Request Entity too Large – Can’t upload large files using IIS6

Well, here’s a new one I ran across recently.  My customer was trying to upload some files using Coldfusion by doing a simple post and was getting a HTTP 413 response when the files were larger than 128K.  IIS6 uses a new metabase property called UploadReadAheadSize when passing data to an ISAPI extension.  In this…

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Access Denied error when running app on IIS 6 and IIS 5.1. Runs fine on Windows 2000.

First off, there are many different things that can cause an Access Denied error in an application hosted in IIS.  This post will cover a little known and “under documented” cause for this error called Loopback Check.  IIS 5.1 and 6.0 added an additional security measure call Loopback Checking to help prevent reflection attacks on…


Server Unavailable, Page Cannot be displayed after reinstalling IIS 6 on W2K3 SP1

Today I’d like to cover another issue that I have seen quite a few times in the past several weeks and one that has a very simple fix.  The problem is that IIS will not serve ASP and ASP.NET pages after reinstalling IIS.  The error that I most frequently see is “Server Unavailable” but it…


Access Denied 401.1 goes away temporarily after IISRESET

I ran into an interesting issue the other day while helping one of our Support Engineers from Exchange.  The customer was getting a 401.1 response when trying to browse a site with anonymous access only.  Initially the SE from Exchange and I both had the same hypothesis that the IUSR account password was out of…

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Password complexity in ASP.NET 2.0

Well, I must admit that my first stab at creating a simple ASP.NET 2.0 site that takes  advantage of the new Membership features was wrought with peril.  Actually it wasn’t that bad but I did have a little trouble when I was attempting to add a new user to my site using the Security Wizard. …


IUSR_ account password out of sync. (Help OWA is not working!)

After seeing this same issue 4 times in the last 2 days, I thought it would be a good idea to post it along with the very simple and quick solution.  First, I would like to clear up what seems to be a common misconception among IIS administrators out there.  The password field for the…

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Default Domain setting only applies when using Basic Authentication

I had a case yesterday where my customer was complaining that the Default Domain setting wasn’t working for him.  For those of you who may not be aware, this setting allows the site admin to set the default domain users will be authenticated against when using Basic Authentication.  This provides a nice shortcut for users…

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