Anti-leech is a plug-in for IIS that safeguards your website against traffic theft by blocking direct linking to your server's resources. Ideal for safeguarding image collections, software or document archives, Flash games, and videos.

But fear not! IIS Anti-leech Sniffer Dog is here to save the day. This IIS plug-in is designed to protect your website from bad actors who steal your traffic by directly linking to the resource on your server. Whether you have an image collection, video, software, document archives, or Flash games, UISD is a great solution for you.
After installing UISD, your site will continue to work as before. All search engines and backlinks will remain valid and user favorites will continue to work. However, any attempts at directly embedding your resources on another site will result in either an error message or your site's logo being displayed.
With UISD, you can save tons of traffic and money. Plus, you can even turn hotlinks into real visitors by redirecting hotlink requests to your site's homepage.
IIS Anti-leech Sniffer Dog is coded in C++ and has extremely high effectiveness, especially in multi-thread IIS5 and IIS6. The product slightly occupies your CPU, but it is designed for high load capability from the very beginning. Compared to some products that use C# ASP script, our product is more reliable and performs much better.
In short, if you're looking for an effective solution to prevent hotlinking and bandwidth leeching, UISD is definitely worth considering.
Version 5.03: http://Anti-leech.versalsoft.com