Additional information for this feature.

When this guide is useful

Users who want to check clock deviation, time synchronization, and TimeZone settings on their PCs and smartphones can check the steps to compare device time and UTC time in a browser.

• Additional information for this feature.
• Check for devices whose log timestamps do not match
• Check the device date and time when a certificate error occurs

Scenes affected by clock deviation

• One-time password and multi-factor authentication
• Determining the expiration date of TLS certificate
• Matching server logs and terminal logs
• Additional information for this feature.

Measurement procedure

1. Connect to a stable network.
2. Execute time acquisition and check the judgment result and acquisition source.
3. Measure several times to check for variations in results.
4. Settings

Precautions when judging numerical values

The external time obtained from the browser includes communication time. Look for continuous deviations that affect authentication and log matching, not differences of tens of milliseconds.

It is not a high precision measuring instrument. Please check NTP settings and server monitoring when ensuring time synchronization of business systems.

Specific example: Check the terminals where one-time passwords cannot be passed

The operation could not be completed.

Check the measurement results and TimeZone, enable automatic OS settings, and then measure again.

1. Execute clock deviation check.
2. Additional information: TimeZone
3. Change the OS date and time to automatic settings.
4. Retry authentication after re-measurement.

Input

Frequently asked questions

Can I check it offline?

Additional information: UTC

Why do the results vary a little from measurement to measurement?

This is due to network delays and browser processing timing changes. Please judge based on the results of multiple tests.