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CAPTCHA schemes still easy to bypass
From http://h-online.com/-1371934
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You don't need to be a genius to debug a pf.conf firewall ruleset, you just need the guts to run tcpdump |
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Wonder how KeyCaptcha performs (https://www.keycaptcha.com/).
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I don't understand that reCAPTCHA is not broken. If I enable this in the forum software for registration of new users, we get 25 to 50 spambot registrations daily.
EDIT: see vBulletin forums hit by reCAPTCHA cracking spam bot
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You don't need to be a genius to debug a pf.conf firewall ruleset, you just need the guts to run tcpdump |
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Quite good if you don't mind to cut your registrations by 95% (from StopForumSpam)
I, for example, cannot register in forums or comment blogs with KeyCAPTCHA (I am on dynamic IP-address getting "We have detected spam activity, your actions are blocked") One should also remember understand that by installing KeyCAPTCHA plugin a webmaster (owner) opens the backdoor for executing scripts in his visitors browsers loaded from KeyCAPTCHA.com backservers of professional spammers (with a long list of deceptive practices) Read:while a webmaster cannot control or even see what is being loaded to his visitors and a visitor cannot even reproduce it (they use for it various tricks like intermittent spamming, only on first couple of min of first visit, on 1st passing, geo-targeting, etc.) Last edited by Virus; 30th June 2013 at 11:39 AM. |
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Quote:
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Have you tried the suggestions in the last paragraph of http://www.pcpro.co.uk/blogs/2011/01...king-spam-bot/, i.e. turning on Q&A? This may be vB 4+ only.
Last edited by DutchDaemon; 7th November 2011 at 04:38 PM. |
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Yes, we turned on Q&A. Now we only get 3 to 4 SEO spam registrations a day.
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You don't need to be a genius to debug a pf.conf firewall ruleset, you just need the guts to run tcpdump |
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