HAProxy configuration and lua scripts implementing a challenge-response page where visitors solve a captcha and/or proof-of-work (cpu intensive) task. Intended to stop bots, spam, ddos, etc.
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ts=%Ts.%ms
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h=%[hdr(host)]
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ip=%ci
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uag=%[req.fhdr(user-agent)]
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http=%HV
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tls=%[ssl_fc]
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tlsv=%sslv
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tlsf=%[ssl_c_sha1,hex]
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sni=%[ssl_fc_sni]
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vey_id=%[env(RAY_ID)]
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expiry=%[env(CHALLENGE_EXPIRY)]
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