What does Probe Status Code !~ ^[23] mean

CopperEgg alerts can use regular expressions, regex in the probe status code alerts.

Probe Status Code !~ ^[23] means that an alert will be generated for any status codes returned that are not 200 or 300 level status codes.

PLEASE NOTE:  this alert will also trigger when the status code returns '0', which indicates that no response was received (timeout or server disconnect).

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