I didnt find it ,but i found the reCaptcha thingy , so i got the key and i've set it up. is that enough to prevent spam ??, is in your original configuration of ipb in admin => member => parameter member => spam protection you have 4 choices here : capcha - mark as spammer - ips antispam - and the last the quizz question (is here you enter your question for custom capcha) It won't be enough to keep spammers out for long. If you are smart, you use CleanTalk. I'm not just suggesting this because it's a fun thing to do, I'm suggesting it because I had to deal with spam bots pming people on my board, and I gave CleanTalk a shot and ever since I had it installed, I haven't had a single spam bot sign up. Yes it's not free, but it's only $8 for a whole year. https://cleantalk.org