Try the following in .htaccess:RewriteEngine OnRewriteCond %{HTTP_USER_AGENT} ^MozillaRewriteRule /* - [L]RewriteCond %{HTTP_USER_AGENT} ^Teleport [OR]RewriteCond %{HTTP_USER_AGENT} ^Internet Ninja [OR]RewriteCond %{HTTP_USER_AGENT} ^Aculinx [OR]RewriteCond %{HTTP_USER_AGENT} ^Ants [OR]RewriteCond %{HTTP_USER_AGENT} ^attach [OR]RewriteCond %{HTTP_USER_AGENT} ^Backstreet [OR]RewriteCond %{HTTP_USER_AGENT} ^BackWeb [OR]RewriteCond %{HTTP_USER_AGENT} ^Bandit [OR]RewriteCond %{HTTP_USER_AGENT} ^Buddy [OR]RewriteCond %{HTTP_USER_AGENT} ^Burner [OR]RewriteCond %{HTTP_USER_AGENT} ^Caitoo [OR]RewriteCond %{HTTP_USER_AGENT} ^Collector [OR]RewriteCond %{HTTP_USER_AGENT} ^Commander [OR]RewriteCond %{HTTP_USER_AGENT} ^Copier [OR]RewriteCond %{HTTP_USER_AGENT} ^Crawler [OR]RewriteCond %{HTTP_USER_AGENT} ^Curl [OR]RewriteCond %{HTTP_USER_AGENT} ^DA ..0 [OR]RewriteCond %{HTTP_USER_AGENT} ^Devil [OR]RewriteCond %{HTTP_USER_AGENT} ^DISCo Pump [OR]RewriteCond %{HTTP_USER_AGENT} ^Down2Web [OR]RewriteCond %{HTTP_USER_AGENT} ^Downloader [OR]RewriteCond %{HTTP_USER_AGENT} ^DownloadIt [OR]RewriteCond %{HTTP_USER_AGENT} ^Drip [OR]RewriteCond %{HTTP_USER_AGENT} ^Eater [OR]RewriteCond %{HTTP_USER_AGENT} ^eCatch [OR]RewriteCond %{HTTP_USER_AGENT} ^Eclipt [OR]RewriteCond %{HTTP_USER_AGENT} ^EirGrabber [OR]RewriteCond %{HTTP_USER_AGENT} ^Enterprise [OR]RewriteCond %{HTTP_USER_AGENT} ^Express [OR]RewriteCond %{HTTP_USER_AGENT} ^Extractor [OR]RewriteCond %{HTTP_USER_AGENT} ^ExtractorPro [OR]RewriteCond %{HTTP_USER_AGENT} ^EyeNetIE [OR]RewriteCond %{HTTP_USER_AGENT} ^FairAd Client [OR]RewriteCond %{HTTP_USER_AGENT} ^FileHound [OR]RewriteCond %{HTTP_USER_AGENT} ^FlashGet [OR]RewriteCond %{HTTP_USER_AGENT} ^FlashSite [OR]RewriteCond %{HTTP_USER_AGENT} ^FlipBrowser [OR]RewriteCond %{HTTP_USER_AGENT} ^GetBot [OR]RewriteCond %{HTTP_USER_AGENT} ^GetRight [OR]RewriteCond %{HTTP_USER_AGENT} ^GetSmart [OR]RewriteCond %{HTTP_USER_AGENT} ^Gets [OR]RewriteCond %{HTTP_USER_AGENT} ^GetWeb [OR]RewriteCond %{HTTP_USER_AGENT} ^Go-Ahead-Got-It [OR]RewriteCond %{HTTP_USER_AGENT} ^gotit [OR]RewriteCond %{HTTP_USER_AGENT} ^Go!Zilla [OR]RewriteCond %{HTTP_USER_AGENT} ^Grabber [OR]RewriteCond %{HTTP_USER_AGENT} ^Grab [OR]RewriteCond %{HTTP_USER_AGENT} ^Grafula [OR]RewriteCond %{HTTP_USER_AGENT} ^Greed [OR]RewriteCond %{HTTP_USER_AGENT} ^HMView [OR]RewriteCond %{HTTP_USER_AGENT} ^Hoover [OR]RewriteCond %{HTTP_USER_AGENT} ^HtGet [OR]RewriteCond %{HTTP_USER_AGENT} ^HTTrack [OR]RewriteCond %{HTTP_USER_AGENT} ^IBrowse [OR]RewriteCond %{HTTP_USER_AGENT} ^iFox98 [OR]RewriteCond %{HTTP_USER_AGENT} ^IGJpg$ [OR]RewriteCond %{HTTP_USER_AGENT} ^InterGET [OR]RewriteCond %{HTTP_USER_AGENT} ^InternetLinkAgent [OR]RewriteCond %{HTTP_USER_AGENT} ^IPhoto [OR]RewriteCond %{HTTP_USER_AGENT} ^iwantmy [OR]RewriteCond %{HTTP_USER_AGENT} ^iwantmyxxx.com [OR]RewriteCond %{HTTP_USER_AGENT} ^JetCar [OR]RewriteCond %{HTTP_USER_AGENT} ^JOC [OR]RewriteCond %{HTTP_USER_AGENT} ^JustView [OR]RewriteCond %{HTTP_USER_AGENT} ^Keepoint [OR]RewriteCond %{HTTP_USER_AGENT} ^leech [OR]RewriteCond %{HTTP_USER_AGENT} ^lftp [OR]RewriteCond %{HTTP_USER_AGENT} ^likse [NC,OR]RewriteCond %{HTTP_USER_AGENT} ^Magnet [OR]RewriteCond %{HTTP_USER_AGENT} ^Mag-Net [OR]RewriteCond %{HTTP_USER_AGENT} ^Mass Downloader [OR]RewriteCond %{HTTP_USER_AGENT} ^Memo [OR]RewriteCond %{HTTP_USER_AGENT} ^MemoWeb [OR]RewriteCond %{HTTP_USER_AGENT} ^MIDown tool [OR]RewriteCond %{HTTP_USER_AGENT} ^Mirror [OR]RewriteCond %{HTTP_USER_AGENT} ^Mister PiX [OR]RewriteCond %{HTTP_USER_AGENT} ^MSProxy [OR]RewriteCond %{HTTP_USER_AGENT} ^Navroad [OR]RewriteCond %{HTTP_USER_AGENT} ^NearSite [OR]RewriteCond %{HTTP_USER_AGENT} ^NetAnts [OR]RewriteCond %{HTTP_USER_AGENT} ^NetDrag [OR]RewriteCond %{HTTP_USER_AGENT} ^NetSpider [OR]RewriteCond %{HTTP_USER_AGENT} ^Offline Explorer [OR]RewriteCond %{HTTP_USER_AGENT} ^Offline [OR]RewriteCond %{HTTP_USER_AGENT} ^PageGrabber [OR]RewriteCond %{HTTP_USER_AGENT} ^Papa Foto [OR]RewriteCond %{HTTP_USER_AGENT} ^pcBrowser [OR]RewriteCond %{HTTP_USER_AGENT} ^PerManSurfer [OR]RewriteCond %{HTTP_USER_AGENT} ^PlantyNet_WebRo [OR]RewriteCond %{HTTP_USER_AGENT} ^Pockey [OR]RewriteCond %{HTTP_USER_AGENT} ^Pump [OR]RewriteCond %{HTTP_USER_AGENT} ^Reaper [OR]RewriteCond %{HTTP_USER_AGENT} ^Recorder [OR]RewriteCond %{HTTP_USER_AGENT} ^ReGet [OR]RewriteCond %{HTTP_USER_AGENT} ^Retriever [OR]RewriteCond %{HTTP_USER_AGENT} ^SilentSurf [OR]RewriteCond %{HTTP_USER_AGENT} ^Siphon [OR]RewriteCond %{HTTP_USER_AGENT} ^Snagger [OR]RewriteCond %{HTTP_USER_AGENT} ^Snake [OR]RewriteCond %{HTTP_USER_AGENT} ^Snarf [OR]RewriteCond %{HTTP_USER_AGENT} ^Snatcher [OR]RewriteCond %{HTTP_USER_AGENT} ^SpaceBison [OR]RewriteCond %{HTTP_USER_AGENT} ^Stripper [OR]RewriteCond %{HTTP_USER_AGENT} ^Sucker [OR]RewriteCond %{HTTP_USER_AGENT} ^SuperBot [OR]RewriteCond %{HTTP_USER_AGENT} ^SuperHTTP [OR]RewriteCond %{HTTP_USER_AGENT} ^Surfbot [OR]RewriteCond %{HTTP_USER_AGENT} ^tAkeOut [OR]RewriteCond %{HTTP_USER_AGENT} ^Vacuum [OR]RewriteCond %{HTTP_USER_AGENT} ^Vampire [OR]RewriteCond %{HTTP_USER_AGENT} ^wantmy [OR]RewriteCond %{HTTP_USER_AGENT} ^Weazel [OR]RewriteCond %{HTTP_USER_AGENT} ^WebAuto [OR]RewriteCond %{HTTP_USER_AGENT} ^WebCopier [OR]RewriteCond %{HTTP_USER_AGENT} ^Webexe [OR]RewriteCond %{HTTP_USER_AGENT} ^WebFetch [OR]RewriteCond %{HTTP_USER_AGENT} ^Web Image Collector [OR]RewriteCond %{HTTP_USER_AGENT} ^WebReaper [OR]RewriteCond %{HTTP_USER_AGENT} ^WebSauger [OR]RewriteCond %{HTTP_USER_AGENT} ^Website Quester [OR]RewriteCond %{HTTP_USER_AGENT} ^Webster [OR]RewriteCond %{HTTP_USER_AGENT} ^WebStripper [OR]RewriteCond %{HTTP_USER_AGENT} ^Web Sucker [OR]RewriteCond %{HTTP_USER_AGENT} ^WebVCR [OR]RewriteCond %{HTTP_USER_AGENT} ^WebWhacker [OR]RewriteCond %{HTTP_USER_AGENT} ^WebZIP [OR]RewriteCond %{HTTP_USER_AGENT} ^WFARC [OR]RewriteCond %{HTTP_USER_AGENT} ^Wget [OR]RewriteCond %{HTTP_USER_AGENT} ^Whacker [OR]RewriteCond %{HTTP_USER_AGENT} ^Widow [OR]RewriteCond %{HTTP_USER_AGENT} ^WWWCopy [OR]RewriteCond %{HTTP_USER_AGENT} ^WWWoffleRewriteRule ..([gG][iI][fF]|[jJ][pP][gG])$ - [F]