Documentation forServer & Application Monitor

DNS Monitor - UDP

This SAM component monitor tests a DNS server's ability to respond to a record query and measures its response time. The component monitor passes if it receives a valid DNS response (positive or negative) within the response time threshold. UDP is the primary method of communication for DNS servers.


This component monitor does not compute a statistic.

Field descriptions


A default description of the monitor. You can override the default description by adding to or replacing the text, which is automatically saved. The variable to access this field is ${UserDescription}.

Changing the default description to specify what will be monitored can be helpful when receiving alerts and notifications later.

Enable Component

Determines if the component is enabled. Disabling the component leaves it in a deactivated state that does not influence its application availability or status, as displayed in the Orion Web Console.

Port Number

The UDP port used for DNS queries. The default value is 53.

Response Time Threshold

Set the warning and critical threshold conditions based on the response time. The response time is the time in milliseconds it takes SAM to determine that a component is not Down and to retrieve any statistical data. See Application Monitor Thresholds.

User Notes

Add notes for easy reference. You can access this field by using the variable, ${UserNotes}.