Alert After X Failures
Please add an option for the ICMP checking that allows alerts to have a threshold that requires a specified number of failures in a row to occur before an alert will be sent. That or allow the ICMP monitor to have a third time period that is the amount of time that the ICMP can be down before an alert is triggered as currently the "Check Interval" is the only time interval and it determines the amount of time in between checks.
This is already the case, thanks to the double check we only send alerts after 2 confirmations checks (so 3 down checks in total).
And with the ICMP check in particular, each check sends 4 ping messages (with 5 second timeout) and is only considered down only if all 4 ping failed.
So in total it would require 12 failed ping in a row (from at least two different locations) to send a “DOWN” alert.