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For no apparent reason that I know of, my ASP.NET website on my local development server (IIS 7) started returning Error Code 500 - Internal server error.

After granting the user "Users (MY_COMPUTER_NAME\Users)" full control rights to this folder (virtual under IIS), the website started running again. But this time my PDF creator DLLs have are still not working (just keep returning null) and it seems to still be this security issue.

Am I missing any other security settings? I have given the folder full control to the following users:

  1. IUSR
  2. SYSTEM
  3. LOCAL SERVICE
  4. NETWORK SERVICE
  5. MyName(Belrije\MyName)
  6. Administrators (Belrije\Administrators)
  7. Users (Belrije\Users)
  8. IIS_IUSRS (Belrije\IIS_USRS)

P/S: Belrije is the computer name

NOTE: I have this same setup running on my laptop with no issues whatsoever.

I am using:

IIS 7
Windows 7 Ultimate
ASP.NET 3.5 Website
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Anything in a hypothetical application error log? Anything in the Windows event log? – Lumi Dec 2 '11 at 14:43
You need to learn about ASP.NET debugging, from blog posts or books such as blogs.msdn.com/b/tom. To know the root cause is the very first step, and then you can start granting permissions in a meaningful way. Your changes (full control to so many accounts) cannot be considered as a good approach. Besides, the errors are really application/site specific, and caused by the modules/code issues. BTW, "NOTE: I have this same setup running on my laptop with no issues whatsoever." is a weak fact. We see so many "it works fine on my machine" here and there. – Lex Li Dec 27 '11 at 5:25
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1 Answer

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This error can be genareted due to several possible reasons.

Please have a look at these article about Error message when you visit a Web site that is hosted on IIS 7.0: "HTTP Error 500.0 – Internal Server Error"

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