The IPBan Pro Web Admin Utility has a recent activity section that will show you failed logins, bans and successful logins. Once entries start showing up here, you know everything is working. You can even try to RDP or SSH into one of your boxes to see if you can get an entry to show up. Keep in mind that if you have whitelisted your own ip address, it will never show up as a failed login or ban.
For IPBan Pro Datacenter clients, you can view the machines tab in the web admin utility to see when the machine last pinged the web admin utility.
To view firewall rules on Windows, find the rules.json file – this file updates every 5 minutes or so. If you have switched to the wfp firewall, run
netsh wfp show filters "file=c:/filters.xml"; notepad "c:/filters.xml"
To view firewall rules on Linux, run
iptables -L; ipset -L