Originally Posted by CHMOD

Webair told me they had to install Link Sentinal on my server.

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LinkSentinel - LinkSentinel is the first, enterprise-class solution for stopping hotlinking. Designed as a high-performance Apache module, the software has negligible CPU/memory impact and works natively with load-balanced domain clusters. LinkSentinel is widely compatible with all media types and referencing content (whether static or dynamic) without requiring any changes to existing linking syntax or document structure. Most importantly, LinkSentinel fixes the security weaknesses of previous hotlinking solutions, while saving webmasters $ from bandwidth theft and copyright violations.

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Looks like it is the only way to really stop this mad hotlinking.

I hope it works.