I manage a Joomla site for one of my clients, and recently, it's been getting bombarded with a bunch of fake registrations, .. about 1 per minute. We suspect that most of them are coming from Germany, .. but we could be mistaken.
I added a captcha to the registration form, .. but it appears that they've managed to get around it somehow, .. as the fake registrations are still making their way into the database at the rate of 1 per minute.
How can we fix this? Is there any way to ban these individuals from registering based on their IP address? If so, .. how? Or is there a better / more reliable way for us to prevent these bogus registrations? Please advise.