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Home: Need a Custom or Prewritten Perl Program?: I need a program that...: Stopping offsite linking to images

countryfan stranger May 19, 2001, 8:44 PM Post #1 of 3 (692 views) Stopping offsite linking to images Can't Post Hi. I run a small free web hosting service, and am having problems with people storing their images on my server, and then linking to them from other websites (thus using my bandwidth and costing me money!). Is there any way that I can stop people from doing this? I know that I could write a script in Perl, but the only way that I can think of doing this is having all the images behind a script ie. instead of the location of each image being shown as www.mydomain.com/image.jpg then it would be something like www.mydomain.com/cgi-bin/imageprotector.cgi?image.jpg. However, this isn't very practical for my purposes. I've noticed that with the larger free web hosting providers such as GeoCities, if you try to link to images stored on their server from offsite, you will be shown an "error" image in their place. Does anyone know how they do this? Is it something that can be done on the server level? (I'm running my site off a dedicated Unix server; is there anything I can set on the server to stop people linking to the images on there?) Any suggestions or help would be very much appreciated!

vandriel Deleted May 21, 2001, 4:47 AM Post #2 of 3 (681 views) Re: Stopping offsite linking to images [In reply to] Can't Post You cannot solve this with a script, but you have to configure this in your .httpd config, by routing all requests for imagefiles to a .sh script. Such as : if (extension=gif/jpg) {check referer} if (referer ne your.domainname) {show error image}

widexl Novice May 21, 2001, 8:26 AM Post #3 of 3 (674 views) Re: Stopping offsite linking to images [In reply to] Can't Post Try this needed mod_rewrite, I use it for linking images. You can try to link my images http://widexl.com/images Protecting your images from linking For this you need mod_rewrite have installed on your webserver. Put a file named .htaccess in the directory where you have the images located. AuthUserFile /dev/null AuthGroupFile /dev/null RewriteEngine On RewriteCond %{HTTP_REFERER} !^http://www.widexl.com.* [NC] RewriteCond %{HTTP_REFERER} !^http://ma.widexl.com.* [NC] RewriteCond %{HTTP_REFERER} !^http://members.widexl.com.* [NC] RewriteCond %{HTTP_REFERER} !^http://widexl.com.* [NC] RewriteCond %{HTTP_REFERER} !^http://212.204.218.80.* [NC] RewriteRule /* http://widexl.com/index.html [R,L] By the RewriteCond change the web address name for who are allowed to use your images. By the RewriteRule change the web address name where to send the ones who are linking to. You need to write for every web address a new line. Remember: http://widexl.com is not the same like http://www.widexl.com

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