A common question that is often asked is how to auto-magically redirect HTTP requests for your web sites to HTTPS. Simply put, if someone types “http://www.yoursite.com” how can you redirect that request to “https://www.yoursite.com”?

This post is the simple answer to that question. IIS’s URL rewrite module can help us accomplish this as well as other rewrite tasks. For a complete look at how URL Rewriting works, take a look at the following MSDN article on URL Rewrite. Then look at the following as an example of what to add to your web.config:

      <rewrite>
        <rules>
          <rule name="Redirect to HTTPS" stopProcessing="true">
            <match url="(.*)" />
            <conditions>
              <add input="{HTTPS}" pattern="^OFF$" />
            </conditions>
            <action type="Redirect" url="https://{HTTP_HOST}/{R:1}" />
          </rule>
        </rules>
      </rewrite>