I know that user agents are one indicator, but that’s easy to spoof. What other reliable indicators are there that a visitor is really a bot? Inconsistent headers? Whether images/javascript are requested? Thanks!
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I know that user agents are one indicator, but that’s easy to spoof. What other reliable indicators are there that a visitor is really a bot? Inconsistent headers? Whether images/javascript are requested? Thanks!
CVSTrac uses a honeypot page to accomplish this. It’s a page linked somewhere on the site where crawlers reach it, but humans usually ignore it. CVSTrac goes one step further by allowing the user to prove that he is human.