There's been problem with spam bots recently on my site and I wanted to know if there's a way to prevent this.
Site here: http://thednetwork.x10.mx/
IP Block China and Russia.
Use 'Spambot Countermeasures' inside the admin control panel, from experience I'd say the best to set it to is Q&A as I used to get a bit of spam and after switching to Q&A it's stopped
I'd find a different captcha plugin. Most of the ones that come with phpbb have been broken.
Just made it Q&A with the question "Whats 2+2?" as I can't be arsed to do more.
Get the Recaptcha plugin if you can find it. Phpbb isn't the best system for board hosting. ;)
Could ask for the cube root of 27, although, like the above, I'm sure there's a few bots out there that are able to detect and solve that.
I've just got mine set to 'type this word backwards:' and just used various random words.
Don't use phpBB.