I've installed Dude on both a PC and Domain controller, but have noticed this error in the server 'system' event log and it's only appeared since installing the application. Further chaecking shows the event happening approx every hour on the hour

"A RADIUS message was received from the invalid RADIUS client IP address 10.0.0.21" (10.0.0.21 is the server IP, I also have an entry for the workstation)

Any ideas?

Thanks

Wild guess but when you installed the dude did you use auto discover and did the radius probe install itself on the server?

Initially installed on workstation, used this to create a configuration that I could export/import into the Dude when installed on server.

I've just unticked the service 'Radius' to see if this stops the event message