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All the Perl that's Practical to Extract and Report

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  • One option may be to spider the site to determine what pages link to one another. If a client requests two pages in close succession that aren't linked together then it's pretty unlikely that they are the same person.
  • This scheme works O.K., except for a handful of visitors who come in via AOL (and hence AOL's proxies).
    I have to surf via a proxy too. But this proxy does provide an extra HTTP header: x-forwarded-for, the value being my own private IP address as assigned to my cabe modem. It results in an equivalent environment variable, "HTTP_X_FORWARDED_FOR", that can be read in CGI scripts.

    I don't have any idea if AOL proxies do the same as the proxy I use, but it is worth investigating.