References > Component Monitor Types > DNS Monitors > DNS Monitor - TCP

DNS Monitor - TCP

This component monitor tests a DNS server's ability to respond to a record query and measures its response time. The record query is an A Name lookup for a.root-servers.net. The component monitor passes if it receives a valid DNS response (positive or negative).

Statistic

This component monitor does not compute a statistic.

Field Descriptions

Description

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

Enable Component

Determines whether the component is enabled. Disabling the component leaves it in the application in a deactivated state not influencing either SolarWinds SAM application availability or status.

Port Number

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

Response Time Threshold

This field allows you to set the warning and critical threshold conditions based on the response time. The response time is the time in milliseconds it takes SolarWinds SAM to determine that a component is not Down and to retrieve any statistical data. See setting Application Monitor Thresholds for more information.

User Notes

This field allows you to add notes for easy reference. You can access this field by using the variable, ${UserNotes}.