HotLink protection prevents other websites from directly linking to
files (as specified below) on your website. Other sites will still be
able to link to any file type that you don't specify below (ie. html
files). An example of hotlinking would be using a <img> tag to
display an image from your site from somewhere else on the net. The end
result is that the other site is stealing your bandwidth. You should
ensure that all sites that you wish to allow direct links from are in
the list below. This system attempts add all sites it knows you own to
the list, however you may need to add others.