config system
option hostname OpenWrt
option timezone UTC
config rdate
list server ac-ntp0.net.cmu.edu
list server ptbtime1.ptb.de
list server ac-ntp1.net.cmu.edu
list server ntp.xs4all.nl
list server ptbtime2.ptb.de
list server cudns.cit.cornell.edu
list server ptbtime3.ptb.de