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NTP Monitoring

NTP monitoring verifies and optionally corrects the local system time with a RFC 1769 and RFC 1305 NTP server (up to version 3) on the local network and/or the Internet. Network latency is taken into consideration when calculating the clock offset, with a precision down to milliseconds.

Interval (Verify Time)

Specifies how often the local time is compared with the time of the configured NTP server(s).

Maximum Tolerance

The maximum time differences (in ms) that is acceptable between the local host and the NTP server. If the time difference between the local host and the NTP server exceeds the maximum tolerance, then an event is logged to the event log (with the severity specified in Log To Event Log) and the local time is adjusted if configured.

Set Local Time if Outside Tolerance

If the time difference between the local host and the NTP server exceeds the maximum tolerance, then the local time is adjusted to match that of the NTP server.

NTP Servers

The list of NTP servers that are queried in the specified interval. You can specify multiple NTP servers, and servers are processed from the top to the bottom. If a server is unreachable, then the next NTP will be contacted.

Recurring Logging

Check the Log time difference every check box to log an informational event to the event log at the specified interval. The event contains the current time difference between the local host and the NTP server.