I see a lot of the same IP being denied access, trying usernames like 'admin' and such. I have Limit Login Attempts active so they can only try 3 times within 20 minutes, but that's not enough based on the activity logs.
Therefore, I'm going to deny those pesky IPs via .htaccess ( http://wpmu.org/limit-access-to-the-wordpress-login-screen-to-specific-ip-addresses/
and http://www.htaccess-guide.com/deny-visitors-by-ip-address/ ).
However, I don't want to have to go through 20 pages when there are only 5-10 unique IPs that I'm looking for. Thus, I think it'd be nice to run a report or whatever to get a list of those IPs that have been denied access more than "x" times within a date range.
Thank you for this plugin.
http://wordpress.org/extend/plugins/threewp-activity-monitor/