RDEM Systems NTP Infrastructure

Active Pool Member

Mission-critical time synchronization for professional and industrial environments.

RDEM Systems NTP Infrastructure: sovereign, precise and NTS-secured time
Time certified by our infrastructure
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View our reliability score on the official NTP Pool

Check your machine's time

Understanding NTP and NTS

How your devices stay on time without any intervention.

Read → Securing with NTS

Cryptographic authentication for your time source.

Read → TOTP and NTP: Your 2FA Codes

Why Google Authenticator depends on an accurate clock.

Read → Our Stratum 1 Server

Raspberry Pi + GPS near Paris: our master time source.

Read → NTP Stratum Levels (0 to 16)

The full NTP hierarchy and typical accuracy at each level.

Read → FAQ

Answers to frequently asked questions about NTP and NTS.

Read → Contributing to the Pool

Why and how to participate in the global NTP pool.

Read →

Available Domains

Our servers respond on 8 different domains. You can mix TLDs according to your preferences:

rdem-systems.{be, biz, com, eu, fr, info, net, org}

Examples: ntp1.rdem-systems.fr, ntp5.rdem-systems.eu, ntp-pool.rdem-systems.net, etc.

Check Your Machine's Synchronization

Test whether your system is correctly synchronized with our Stratum 1 NTP reference:

Method 1: Via web browser
Test in browser →
Method 2: Via command line (CLI)
curl -sL https://ntp.rdem-systems.com/ntp-check.sh | bash

What is it used for?

Virtualization: Proxmox clusters and High Availability (HA). Host NTP on a Proxmox VM →
Monitoring: Log consistency and event timestamping.
Industry: Industrial environments and embedded systems.
Compliance: Systems subject to traceability requirements.
Diagnostics: Online NTP testing tools we have referenced: check-ntp.net · ntp-tester.eu

Server Configuration

Add our servers to your configuration for increased redundancy.

Public NTP Server List (Stratum 2)

ntp-0.hq.rdem-systems.com (S1)
ntp1.rdem-systems.com
ntp2.rdem-systems.com
ntp3.rdem-systems.com
ntp4.rdem-systems.com
ntp5.rdem-systems.com
ntp6.rdem-systems.com
ntp7.rdem-systems.com
ntp8.rdem-systems.com
ntp9.rdem-systems.com
ntp10.rdem-systems.com
ntp11.rdem-systems.com

Free NTP Synchronization Guide

Download our whitepaper: "Time Synchronization Best Practices for Windows & Linux"

  • ✓ Complete w32tm configuration for Active Directory
  • ✓ Chrony vs ntpd: which to choose
  • ✓ Firewall rules and network architecture
  • ✓ Troubleshooting Stratum 16 and false tickers

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Free NTP Tools

Three independent tools to diagnose your time synchronization: