Servidores de tiempo recomendados para NetTime

timex.cs.columbia.edu   protocolo SNTP puerto 123
ntp-1.delmarva.com
ntp-1.mcs.anl.gov
tick.usno.navy.mil
ntp2.usno.navy.mil

Update interval: 600 sec
Retry interval: 600 sec
Max. Free Run: 7500 sec
Warn is Adj. Greater: 120 sec
tick on show NetTime icon in the system tray
Tick on Start NetTime service at booup
Untick Never warn