In my log in the main menu under Logs | System Events | Status Messages I can see these three messages:
9/26/2011 9:20:59 AM Starting Core Server: PRTG Network Monitor 220.127.116.118 PRTG Network Monitor 500 9/26/2011 9:22:01 AM Logon attempts slowed down due to failed logon margin exceeded in a short amount of time 9/26/2011 10:21:24 AM 100 logons failed since last start of PRTG
At the same time I notice that logging into the web interface takes a few seconds and most actions inside the Enterprise Console also take a few seconds. I have also received a ticket about this issue.
What is going on?