Time Server Setup · EonaCat NTP

Windows

Open PowerShell or Command Prompt as Administrator, then run:

w32tm /config /manualpeerlist:"ntp.eonacat.com,0x8" /syncfromflags:manual /update
net stop w32time
net start w32time
w32tm /resync /rediscover

Verify

w32tm /query /status
w32tm /query /peers

Linux with systemd-timesyncd

Run these commands in a terminal. This creates a local drop-in instead of overwriting the distribution config.

sudo install -d /etc/systemd/timesyncd.conf.d
printf '[Time]\nNTP=ntp.eonacat.com\nFallbackNTP=\n' | sudo tee /etc/systemd/timesyncd.conf.d/eonacat.conf
sudo systemctl restart systemd-timesyncd
sudo timedatectl set-ntp true

Verify

timedatectl timesync-status

macOS

Open Terminal and run the commands below. macOS will ask for an administrator password.

sudo systemsetup -setnetworktimeserver ntp.eonacat.com
sudo systemsetup -setusingnetworktime on

Verify reachability

sntp ntp.eonacat.com

Android and iOS

Stock Android and iOS do not provide a supported setting for a custom NTP server. Keep Automatic date & time enabled for normal use.

Managed devices

Use your MDM or device-vendor policy when it exposes a network-time server setting.

Network rollout

Advertise this server with DHCP option 42. Support varies by mobile OS and device vendor.

Rooting, jailbreaking, or time-sync apps cannot be recommended as a reliable fleet configuration.

Sync the whole network

Set DHCP option 42 (NTP Servers) on your router or DHCP server to the IP address of ntp.eonacat.com.

Give the NTP host a static IP or DHCP reservation.
Allow inbound UDP 123 through the host firewall.
Publish DHCP option 42 with the server IP, not its hostname.
Renew client leases and verify on each operating system.

DHCP does not guarantee that every client will use option 42. Keep the platform-specific configuration for devices that ignore it.