To configure Amazon Time Sync Public NTP for Microsoft Windowsįor a backup to the Amazon Time Sync link-local service, and to connect resources outside of Amazon EC2 to the Amazon Time Sync Service, you can use the Amazon Time Sync Public NTP pool located at .Īmazon Time Sync Public NTP, like the Amazon Time Sync service, automatically smooths any leap seconds that are added to UTC. An instance must have access to the internet for theįor Linux instances, see Set the time for your Linux instance. Information about NTP and public time sources, see. Alternatively, you can use external NTP sources. Use the following procedures to configure the Amazon Time Sync Service on your instanceįrom the command prompt. Troubleshooting activities (correlating logs), and more. When you use local timezones rather than UTC, make sure that you account for aspects suchĪs daylight savings time (when applicable) for automation, code, scheduled jobs, You can, however, choose to use a different time zone to Human error and to facilitate synchronization across your CloudWatch Logs, Metrics, local We recommend that you use Coordinated Universal Time (UTC) for your instances to avoid The IPv6 address is onlyĪccessible on Instances built on the Nitro System. If you are retrieving time for EC2 instances over the IPv6 address,Įnsure that you use the IPv6 address instead: fd00:ec2::123. The examples in this section use the IPv4 address of the Amazon Time Sync Service:ġ69.254.169.123. Windows AMIs synchronize with the Amazon Time Sync Service by default. Security group rules or your network ACL rules to allow access. ![]() Your instance does not require access to the internet, and you do not have to configure your IPv4 address or the fd00:ec2::123 IPv6 address for any instance running in a VPC. The Amazon Time Sync Service is available through NTP at the 169.254.169.123 TheĪmazon Time Sync Service automatically smooths any leap seconds that are added to UTC. This service uses a fleet of satellite-connectedĪnd atomic reference clocks in each Region to deliver accurate current time readings of theĬoordinated Universal Time (UTC) global standard through Network Time Protocol (NTP). Instance are not set correctly, the date in the signature may not match the date of theĪmazon provides the Amazon Time Sync Service, which is accessible from all EC2 instances,Īnd is also used by other AWS services. If you use the AWS CLI or an AWS SDK to make requestsįrom your instance, these tools sign requests on your behalf. Most system logs include a time stamp that you can use to determine when problems occur and A consistent and accurate time reference is crucial for many server tasks and processes.
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