Base
Hardened build
minimal ports, security patches applied at build time
Chrony
Azure
Networking
1 variation
Chrony, a secure, high accuracy NTP time server that keeps your network's clocks correct to well under a millisecond.
Variations
This product is available in the build below. Open it for the operating system, cloud and version detail, or read its deployment guide.
| Product | Cloud | Operating system | Version | |
|---|---|---|---|---|
| Chrony NTP Time Server on Ubuntu 24.04 LTS | Azure | Ubuntu 24.04 | Standard | View · Guide |
Overview
Chrony is an open source, versatile implementation of the Network Time Protocol and the modern default time daemon on most Linux systems. Running as the chronyd service, it disciplines the local clock from upstream NTP sources and serves precise time to other machines on UDP port 123, recovering gracefully from network interruptions and large offsets far better than the legacy ntpd it replaces. It is administered entirely from the command line with chronyc, so there is no database and no web console to manage.
Why the cloudimg image
The cloudimg image is hardened and fully patched with Chrony preconfigured as a network time server. It ships secure by default and is never an open amplifier: it answers only the local host and the private network ranges, a scoped allow list rather than allow all, and its command interface is bound to the local host only., first boot adds the Hyper V host hardware clock as a high accuracy reference, and every instance is backed by a paired deploy guide and 24/7 cloudimg support.
Common uses
- A precise NTP time server for your private network
- High accuracy sync from the Azure host hardware clock
- Secure time service that is not an open amplifier
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