How do I protect my forum against spam?

Question

I have a forum on a website I master, which gets a daily dose of pron spam. Currently I delete the spam and block the IP. But this does not work very well. The list of block

Answer 1

There is no single answer since Spam is really a matter of economics: how much is it worth it to someone to put their stuff onto the web. There, however, some solutions that seem pretty good

• Recaptcha
• Use CCS to create an invisible field that robots fill-in
• Create a time-specific hidden field in your form so the robot can't use the same form over and over again.