Protect yourself from external websites eating your bandwidth with BunnyCDN.
With our simple allowed referrers security tool, you can protect your content from backlinking and stop people stealing your bandwidth. Web crawlers like Google still have full access to the files. Just enter the list of the hostnames that you trust and you're all set.
Hotlinking can cause huge bandwidth usage, and bandwidth costs money, so by keeping the bad guys out with a CDN, you're saving even more.