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- https://www.drupal.org/project/httpbl (gets about 80% of them)
- https://www.drupal.org/project/honeypot (enable on external facing forms. don;'t enable on node form as it will make editing the site hard sometimes)
- https://www.drupal.org/project/antibot (This is a new one I am evaluating)https://www.drupal.org/project/mollom (on heavier hit forms just use straight up Captcha)
note that these solutions will turn caching off on pages where forms live.
For For email obfuscation see: Email obfuscation
CAPTCHA OPTIONS
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In one case out of many, it seemed the SPAM attacks were DDoS attemps. One site was getting over 100k hits per day on their forms. Although this method stopped all of them. The external calls to mollom crushed the site performance. There is not much you can do but enable New Relic, check the reports and most likely disable all forms on the site in a case like this until they go away. |
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