After adding this piece of code I had a problem with the URLs (/information/, /show-all/ etc. ). This manifested itself even in the names of pictures.(trash.png, showreel.png) The problem is that you forgot to put the points. Right?
<denyUrlSequences>
<add sequence=".inc" />
<add sequence=".info" />
<add sequence=".sh" />
<add sequence=".sql" />
<add sequence="\..*" />
</denyUrlSequences>