The hotlink protection provided by KS3 is controlled by black-and-white list, in which the black list is used to add the source domain names that are not allowed to access, and the white list is used to add the source domain names that are allowed to access. The hotlink protection function can be set to off manually.
Note the following rules when entering a domain name：
Because some legitimate requests don't have a referer source header, sometimes you can't refuse requests with a blank source header（referer）. In KS3, we also provide the option to manually set the referer.