The Image Blocker (imgblock) is an IIS ISAPI Filter DLL that prevents other
sites from hyperlinking directly to your graphics. The Internet allows any site
to hyperlink to any resource on any other site. When another site links to
graphics on your site, you are paying for the bandwidth to deliver the graphic
to the other site. There is no benefit to you as the original site owner. This
product gives you the ability to limit other sites from linking directly to your
graphical resources. It does not prevent them from linking directly to your web
pages which is generally what you want.
Situations where this is useful:
You provide web site space to your customers and you do not want your server to
host pictures for a high-traffic auction site.
You maintain a site that hosts original graphics and you want to limit the
ability for other sites to link directly to your graphics.
You want to help minimize your bandwidth costs.
When you install this product and another site attempts to link to your graphic
resources, they will receive a Page Not Found (404) error. However, the resource
will appear correctly on your own web pages.
Note that this product blocks resources based on file extensions, so you are
free to block movies, pictures, style sheets, scripts or anything else you
desire to block.