How Monitor feature works

The Monitor feature is used to periodically check the reachability status of the Sefthy-protected device by measuring latency and packet loss percentage.

The operation is quite simple: from the network interface connected on the internal LAN, 4 arping requests are made to the device, which if present will respond with its MAC Address, and from the responses received latency and packet loss are calculated.

Operating in Layer 2, arping allows us to check whether a device is actually connected to the network, regardless of some network/firewall misconfigurations of the device, which might limit the responses to the classic ping.