Prtg Network Monitor 21.0.x Link

For high-availability setups, introduced a more responsive cluster connection monitoring. The failover time between the master and secondary nodes was reduced significantly—usually falling under 30 seconds.

A free version is available that offers full functionality for up to 100 sensors. Setup and Management prtg network monitor 21.0.x

Alerts in PRTG go beyond basic "Up/Down" states. You can configure: For high-availability setups

: Many core sensors were upgraded to "v2" for better performance. For example: prtg network monitor 21.0.x

Before upgrading: