&gt; Surely if all your internal hosts are talking directly to the external NTP servers you are doing it wrong? My gateway box sets itself by pool.ntp.org and the internal ones set themselves by it. I thought that was how you should do things (even if it isn&#x27;t a rule, it is only polite to try not overuse a public resource).<p>Depends on how many internal hosts you have, and ease of configuring them (there is a DHCP option for ntp server, but not everything will use it), and available hardware to setup ntp servers: ideally you would have each client syncing from three servers so the clients drop a broken server.