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- Thwarting referer spam/ CPC click fraud
- Karl Groves
March 1, 2007, 9:50 pm
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Intriqued by referer spam, I recently decided to play with some newfound
CURL skillz to see how it is done. As anyone who's ever used CURL can tell
you, fudging the referer is painfully easy.
What isn't (as easy) is fudging the IP of the requester. That is, unless
you're able to send your requests for numerous, random, proxy servers.
Again, not hard once you find a list.
Well, I've been successfully spamming my own logs for 48 hours now. No, I'm
not sharing with anyone. It was an experiment only.
This all begs the question: How do you thwart it?
Naturally, for referer spam, all you do is find the spammy url, and block
them in .htaccess.
What about CPC fraud? The principle is the same, except instead of just
random proxy IPs, you'd cycle through random referer URLs as well, which
makes it harder to track down.
What then, say you?
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