EC2 NTP

Recently I needed to block all public egress from our VPC. I could see we still have some NTP traffic going out to time.aws.com . Initially I started following AWS documentation Set the time reference &hellip; , but quickly realized it is outdated for amazon linux instances. This article describe how to set NTP on EC2 (Amazon Linux 2023) to only link local NPT server. By default, EC2 instances is…