OpenNTPD¶

Field	Value
Purpose	OpenNTPD specific configuration — BSD-origin NTP implementation, simpler than ntpd
Repo	AmadlaOrg/Entities/Application/Timekeeping/OpenNTPD
Entity URI	`amadla.org/entity/application/timekeeping/openntpd@v1.0.0`
Parent type	Application/Timekeeping

Schema¶

Property	Type	Description
`listen_on`	array of strings	Addresses to listen on for NTP queries (e.g., `*`, `127.0.0.1`)
`constraints_from`	array of strings	HTTPS URLs used to constrain NTP responses (MITM protection)
`sensor`	array of strings	Hardware time sensors (e.g., `/dev/gps0`)

Example¶

_type: amadla.org/entity/application/timekeeping/openntpd@v1.0.0
_extends: amadla.org/entity/application/timekeeping@v1.0.0
_body:
  servers:
    - time.google.com
  pools:
    - pool.ntp.org
  listen_on:
    - 127.0.0.1
    - "::1"
  constraints_from:
    - "https://www.google.com"

When to Use¶

BSD systems (OpenBSD, FreeBSD) where OpenNTPD is the native choice
Simplicity is preferred over ntpd's feature set
constraints_from provides HTTPS-based MITM protection — unique to OpenNTPD

Consumers¶

Tool	How It Uses Application/Timekeeping/OpenNTPD
lay	Installs the `openntpd` package
weaver	Generates `/etc/ntpd.conf`
enjoin-service	Enables/starts `ntpd` (OpenNTPD) service