Unscrupulous site owners may link to your content directly and literally steal your bandwidth. This theft is commonly called leeching, hotlinking, inline linking, or bandwidth theft, and such direct linking to your valuable image, video, binary files or other important site content is typically done without your knowledge. Now, with LinkDeny, you can cost effectively fight back and control access to your Web site or Web-based application content.
LinkDeny - details 
