How to stop registrations from China?

[akonze]

Hi everybody,

i maintain a really small vBulletin over at forum.odoo.tv. Although it is a small board I have between 2 to 4 registrations every day from people coming from china.

As Odoo.tv is a german website only, I believe these are only spammers. They never post anything, always are born on january 1st 1980 and always have numbers in theier usernames.

I use german questions like "was ist drei mal vier" (= what is three multiplied by four) during the registration. No captcha images. Furthermore I use the Check4Spam Addon. But this only helps if someone actually posts something.

So, do you have any ideas to get rid of these unwanted registrations? How do you handle this on larger boards? Is there an addon which I might not have found yet? Would it make sense to block certain ip ranges (i.e. using the .htaccess file)?

Thanks for your ideas :up: