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IIS 7 Dot Tricks, Part II

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I would like to have a secure server, so why not block all unknown file extensions? I can easily achieve that by setting allowUnlisted to false in applicationHost.config file on <system.webServer\requestFiltering\fileExtensions> tag.

But why I cannot access my site via https://(server_name)/! Why the rule starts to block default document?

The single DOT can save you again. Simply create a new rule under <fileExtensions> tag like this,

<add fileExtension="." allowed="true" />

And you are done.