Hello, I'm running into a issue on a probe server with the following probe device error:
The UDP port 68 could not be opened. To resolve this issue, make sure that the port is not in use. Also make sure that the port is opened in your firewall or create respective NAT rules for this port. (code: PE091)
I checked the firewall, port 68 is open and not being used by any other app. All IPs are internal and no NATing is needed. I have two PRTG server in failover config, and two other probe servers besides the one with the error and they all are reporting no errors. Any suggestions where to start looking?