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Re: Browser fingerprinting?

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On 9/13/2013 1:49 AM, Michael Vilain wrote:
> In article <l0tvb5$2ot$1@dont-email.me>, Fiver <numeralfive@gmail.com>
> wrote:
>
>> On 2013-09-12 23:56, Gilles wrote:
>>> I'd like to find some good PHP code that does what Panopticlick does,
>>> namely uniquely identify a user's browser even when they connect as
>>> anonymously as they can, ie. either in incognito mode or by running a
>>> browser in a virtual host:
>>>
>>> www.lifehacker.com/5458513/panopticlick-shows-how-easy-your-browser-is-to-tr
>>> ack
>>>
>>> The goal is to keep trolls away from a site.
>>
>> In that case, forget it.
>>
>> The Panopticlick demo isn't intended as something to emulate in
>> practice, but rather as something to be aware of. It works best on
>> visitors who don't know or don't care about how much information they
>> divulge. When I visit the demo site with all of the default plugins
>> enabled, I'm a unique snowflake. On the other hand, if I wanted to hide,
>> I'd turn plugins and scripting off for that site, and maybe go through a
>> proxy, and then I'm just one in a million.
>>
>> If you target your troll too closely, he can trivially evade your
>> filter. If your constraints are too loose, you'll hit some legitimate
>> visitors. There's just no way you can win this battle by fingerprinting
>> the troll.
>>
>> Forget it.
>>
>>
>> regards,
>> 5er
>
> I kept getting humans evading my CAPATCHA and sending me marketing SPAM
> through my web site's contact form.  After a while, I would just go
> through the web long and find the IP address that completed the form and
> block the entire subnet.  So far, entire swaths of China, South America,
> and Russia can't view my site.  Their connection is refused based on
> their IP address.
>
> A broad brush, I know, but I haven't had any marketing emails to improve
> my SEO score, improve my site, or better my mortgage interest rate.
>

You probably need a different CAPTCHA.  Many of the commonly available 
ones have been broken.

I wrote my own and my spam rate has dropped to zero.

-- 
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex@attglobal.net
==================

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Browser fingerprinting? Gilles <nospam@nospam.com> - 2013-09-12 23:56 +0200
  Re: Browser fingerprinting? Denis McMahon <denismfmcmahon@gmail.com> - 2013-09-12 22:26 +0000
    Re: Browser fingerprinting? Gilles <nospam@nospam.com> - 2013-09-13 00:38 +0200
      Re: Browser fingerprinting? Gilles <nospam@nospam.com> - 2013-09-13 00:43 +0200
        Re: Browser fingerprinting? Denis McMahon <denismfmcmahon@gmail.com> - 2013-09-12 23:29 +0000
          Re: Browser fingerprinting? Gilles <nospam@nospam.com> - 2013-09-13 09:23 +0200
            Re: Browser fingerprinting? Jerry Stuckle <jstucklex@attglobal.net> - 2013-09-13 09:32 -0400
    Re: Browser fingerprinting? Twayne <nobody@spamcop.net> - 2013-09-13 19:13 -0400
      Re: Browser fingerprinting? Christoph Michael Becker <cmbecker69@arcor.de> - 2013-09-14 01:30 +0200
  Re: Browser fingerprinting? jimp@specsol.spam.sux.com - 2013-09-12 22:19 +0000
  Re: Browser fingerprinting? Jerry Stuckle <jstucklex@attglobal.net> - 2013-09-12 20:31 -0400
    Re: Browser fingerprinting? "J.O. Aho" <user@example.net> - 2013-09-13 06:59 +0200
  Re: Browser fingerprinting? Fiver <numeralfive@gmail.com> - 2013-09-13 05:04 +0200
    Re: Browser fingerprinting? Michael Vilain <vilain@NOspamcop.net> - 2013-09-12 22:49 -0700
      Re: Browser fingerprinting? Jerry Stuckle <jstucklex@attglobal.net> - 2013-09-13 09:35 -0400
      Re: Browser fingerprinting? Martin Leese <please@see.Web.for.e-mail.INVALID> - 2013-09-13 08:42 -0600
      Re: Browser fingerprinting? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-09-15 20:57 +0200
    Re: Browser fingerprinting? Gilles <nospam@nospam.com> - 2013-09-13 09:22 +0200
      Re: Browser fingerprinting? Twayne <nobody@spamcop.net> - 2013-09-13 19:30 -0400
        Re: Browser fingerprinting? Gilles <nospam@nospam.com> - 2013-09-15 00:11 +0200
          Re: Browser fingerprinting? Twayne <nobody@spamcop.net> - 2013-09-15 16:27 -0400
            Re: Browser fingerprinting? "Peter H. Coffin" <hellsop@ninehells.com> - 2013-09-15 21:07 -0500
            Re: Browser fingerprinting? Gregor Kofler <usenet@gregorkofler.com> - 2013-09-16 11:36 +0200
              Re: Browser fingerprinting? Twayne <nobody@spamcop.net> - 2013-09-17 20:02 -0400
                Re: Browser fingerprinting? "Peter H. Coffin" <hellsop@ninehells.com> - 2013-09-17 22:47 -0500
            Re: Browser fingerprinting? Norman Peelman <npeelman@cfl.rr.com> - 2013-09-16 06:13 -0400
              Re: Browser fingerprinting? Denis McMahon <denismfmcmahon@gmail.com> - 2013-09-16 11:03 +0000
                Re: Browser fingerprinting? Twayne <nobody@spamcop.net> - 2013-09-17 20:11 -0400
              Re: Browser fingerprinting? Twayne <nobody@spamcop.net> - 2013-09-17 20:06 -0400
                Re: Browser fingerprinting? The Natural Philosopher <tnp@invalid.invalid> - 2013-09-18 01:33 +0100
          Re: Browser fingerprinting? Marc van Lieshout <invalid@example.com> - 2013-09-17 22:53 +0200
            Re: Browser fingerprinting? Twayne <nobody@spamcop.net> - 2013-09-17 20:20 -0400
            Re: Browser fingerprinting? Denis McMahon <denismfmcmahon@gmail.com> - 2013-09-18 05:06 +0000
              Re: Browser fingerprinting? Scott Johnson <noonehome@chalupasworld.com> - 2013-09-18 06:09 -0700
                Re: Browser fingerprinting? "J.O. Aho" <user@example.net> - 2013-09-18 18:24 +0200

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