Código PHP:
RewriteEngine on
RewriteCond %{HTTP_REFERER} !^$
RewriteCond %{HTTP_REFERER} !^http://(www\.)?dcristo.org(/)?.*$ [NC]
RewriteRule .*.(jpg|jpeg|gif|png|bmp|mp3|flv|swf|rar)$ http://www.dcristo.org/noladrones.jpg [L]
RewriteBase /
RewriteCond %{HTTP_USER_AGENT} ^JetCar.* [NC]
RewriteCond %{HTTP_USER_AGENT} ^FlashGet.* [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^Teleport.* [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^NetAnts.* [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^WebZIP.* [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^Offline.* [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^GetRight.* [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^Go!Zilla.* [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^GoZilla.* [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^WebReaper.* [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^ia_archiver.* [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^wget.* [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^HTTrack.* [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^WebStripper.* [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^WebCapture.* [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^Scooter-W3.* [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^WebCopier.* [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^FlashGe.* [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^Webdupe.* [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^NetAnts.* [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^Pockey.* [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^DiscoPump.* [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^InternetNinja.* [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^Bullseye.* [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^EmailCollector.* [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^EmailSiphon.* [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^EmailWolf.* [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^ExtractorPro.* [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^Crescent.* [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^CherryPicker.* [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^fastlwspider.* [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^SurfWalker.* [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^GetWebPage.* [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^lwp-trivial.* [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^NICErsPRO.*
RewriteRule .* - [F,L]
Si me indican por favor cómo puedo solucionar esto estaré muy agradecio.