Posted by Handy-Andy on February 5, 2013 at 7:44pm
I have been running a Drupal 7 site, and got lots of user signups that were obviously 'on the make' so I installed the Captcha module and reduced the number quite dramatically... BUT... There are still a good number getting through...
What is your experiance of Captcha and which method do you find works best:
... Traditional
... Image
... Maths
... HappyCaptcha (which is a new one to me, I'm just trying it now)
If you have another route to keep your users 'real' please also post too.
Hope you can all help
A.
Comments
Auto-registration bots are
Auto-registration bots are getting smarter at reading images. Instead of using image verification and even the math ones, the newer ones are using questions. This gives a lot of room to verify a human as you can ask almost anything and verify the answer.
Confident CAPTCHA
I like the picture-based approach used in Confident CAPTCHA: http://drupal.org/project/confident_captcha
It's easy for people to solve and it does a good job at keeping out the spam.
Regular captchas do more harm
Regular captchas do more harm harassing your real visitors than they help. Better use a service like Mollom. They analyze the post first, most normal posts get through without your visitros even knowing you protect your site somehow, some clear spam gets simply blocked, and in doubtful situations they present captcha.
You might also want to try Cloudflare CDN. They are also just great in blocking spammers without even reaching your website (and this way also saving your bandwidth.)
Find European Hosting