server time.cloudflare.com iburst nts server ntppool1.time.nl iburst nts server nts.netnod.se iburst nts server ptbtime1.ptb.de iburst nts server time.dfm.dk iburst nts server time.cifelli.xyz iburst nts minsources 3 authselectmode require # EF dscp 46 driftfile /var/lib/chrony/drift ntsdumpdir /var/lib/chrony leapseclist /usr/share/zoneinfo/leap-seconds.list makestep 1.0 3 rtconutc rtcsync cmdport 0 noclientlog