wikinerd asks: "I have recently opened my own community website. Everything was fine until spammers found it, which happened quite quickly. As usual they filled up my mailboxes, but SpamAssassin can take care of that when it is needed. Then, they discovered my blog and my wikis and employed their bots to fill them up with spam comments. I solved this problem by moderating all comments. Now, however, they employed another evil trick: Referrer spam. They caused my webserver statistics to grow up by orders of magnitude by making their stupid websites to show up on my referrer lists. Unfortunately now my webserver usage statistics are full of viagra, poker, casino, porn, spyware, and pharmacy sites. I am afraid that this is a problem I cannot solve with the knowledge and the tools I have at the moment. So, I came here to ask Slashdot readers: How can I fight referrer spam and what tools are available in a GNU/Linux environment to ensure clean and spam-free usage statistics?"
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