Second Knock

What is Second Knock (SK in short)?

Concider the following setup :

When Servers Alive tries to check the server, the slow-link is not yet up. And the host is seen as down. Using the SK option, you can ask Servers Alive to recheck this hosts at the end of the checkcycle and give the slow link the time to get up.
Most of the time this feature is used if you're checking hosts over a slowlink (aka WAN)
Little example :


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