Troubleshooting dynamic compression in IIS 7

FREB logs are the best tool to troubleshoot compression issues on IIS 7. But before starting looking into FREB logs, it’s good to check following configuration settings in applicationhost.config file.   <httpCompression directory=”%SystemDrive%\inetpub\temp\IIS Temporary Compressed Files”>             <scheme name=”gzip” dll=”%Windir%\system32\inetsrv\gzip.dll” />             <staticTypes>                 <add mimeType=”text/*” enabled=”true” />                 <add mimeType=”message/*” enabled=”true” />                 <add…

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IIS manager crashing while creating server certificate request

Recently I worked on an issue where IIS manager was crashing while creating server certificate request. It was actually badly configured Cryptographic provider that was causing this crash. This was identified very easily by running the csptest command on the server. Output gave us the errors with cryptographic providers.   1.    Open command prompt as…

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Understanding Kernel mode authentication in IIS 7

By default, IIS 7 enables kernel-mode authentication for the Windows (which use either Kerberos or NTLM), authentication scheme. Kernel-mode authentication provides the following advantages:   •Your Web applications can run using lower-privileged accounts. •If you use Kerberos authentication, you can use a different account than the default account associated with the Service Principle Name (SPN)…

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