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NTP Server

Production-grade Network Time Protocol server written in Go.
Upstream sync · Rate limiting · CIDR policy · HTTP API

Current UTC Time — Live loading

--:--:--

—

Stratum

—

Offset

—

RTT

—

Reference ID —

Upstream server —

Run Your Own & Connect

Clone the repo, start the server, then point any NTP client at it.

Clone git clone https://github.com/aykutsp/ntp-server.git

Run go run ./cmd/ntp-server -config ./configs/server.example.json

NTP 127.0.0.1 : 12300 / UDP

HTTP API http://127.0.0.1:8080

Client Examples

go run ./cmd/ntp-query -server 127.0.0.1:12300

# /etc/chrony.conf
server 127.0.0.1 port 12300 iburst

sudo systemctl restart chronyd
chronyc tracking

sntp -S 127.0.0.1

w32tm /config /manualpeerlist:"127.0.0.1" /syncfromflags:manual /update
w32tm /resync /force
w32tm /query /status

pip install ntplib

import ntplib
r = ntplib.NTPClient().request('127.0.0.1', port=12300)
print('offset:', r.offset, 'stratum:', r.stratum)

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Built with Go · MIT License