I do not believe the captcha is needed for the login. It's just for registering. Are you saying that users cannot login anymore after installing the captcha extension?

I got hammered by spam. So I upgraded to the latest punbb and added the captcha install.  Thats all good.

Next step is to ban all the IPs and or user names. How do I ban all the IPs of the spam user names? I know how to ban an ip range, but thats not what I want. I want to ban every specific IP. Also, will banning the ips cause the posts to be deleted? Or do I have to delete the posts manually?