<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <system.webServer>
     <rewrite>
      <rules>
        <rule name="block semalt referer" patternSyntax="Wildcard" stopProcessing="true">
          <match url="*" />
          <conditions>
            <add input="{HTTP_REFERER}" pattern="*.semalt.com" />
          </conditions>
          <action type="AbortRequest" />
        </rule>
      </rules>
    </rewrite>
  </system.webServer>
</configuration>