Spam robots in the forum

We did have been running a week with must register option as we are invaded by automatic adverticing bots, we hope we solved that problem so we have the option enabled again that a guest without registering also can post a message again.
Also we did have a problem that a few of our friends were blocked, this was due a ip rage that was blocked, so that was due a mistake i made during blocking a automated spam robot,
anyway, hope that 6 hours of work was not for nothing and that we did put a stop to this kind of adverticing. Greetings Alfred

Well done Alfred, keep up the hard work.
Dave.

Well done Alfred, keep up the hard work.
Dave.

Thanks Dave. we try to get the board running as good as we can, still not solved the problem with auto posting,, just changed it again that posting is only for registered members,, otherwise the spam robots still can post