NTPD.CONF(5) File Formats Manual NTPD.CONF(5) (NAME) ntpd.conf - OpenNTPD (DESCRIPTION) ntpd(8) . ntpd.conf : `#' . . : listen on address [rtable table-id] ntpd(8) NTP NTP . IP ntpd(8) . ntpd(8) . `*' ntpd(8) . ntpd(8) . rtable (rdomain) . ntpd(8) . : listen on * listen on 127.0.0.1 listen on ::1 listen on 127.0.0.1 rtable 4 query from sourceaddr IP ntpd(8) . : query from 192.0.2.1 query from 2001:db8::1 sensor device [correction microseconds] [refid ID-string] [stratum stratum-value] [trusted] [weight weight-value] (timedelta) ntpd(8) . ntpd(8) . . `*' ntpd(8) . ntpd(8) . : sensor * sensor nmea0 correction . . DCF77 : sensor udcf0 correction 70000 refid ID-string (ASCII) . RFC 2030 << >>. ID-string ntpd(8) . : sensor nmea0 refid GPS stratum (stratum) . trusted (constraints) . constraints . weight ( ) . . . server address [trusted] [weight weight-value] IP NTP . ntpd(8) . IPv4 / IPv6 ntpd(8) . ntpd(8) . : server 10.0.0.2 weight 5 server ntp.example.org weight 1 (redundancy) . . servers address [trusted] [weight weight-value] server, IP NTP . ntpd(8) . IP ntpd(8) . : servers pool.ntp.org servers pool.ntp.org weight 5 (CONSTRAINTS) ntpd(8) `Date' HTTPS TLS . NTP . NTP NTP . ntpd(8) libtls LibreSSL (link) . libtls ntpd(8) . constraint from url [ip...] (URL) IP HTTPS . IP IP . URL URL . constraint from ntpd(8) . server ntp.example.org constraint from www.example.com constraint from "https://9.9.9.9" "2620:fe::9" constraints from url constraint from, (URL) IP HTTPS . IP ntpd(8) . : servers pool.ntp.org constraints from "https://www.google.com" (FILES) /etc/ntpd.conf ntpd(8). (SEE ALSO) ntpctl(8), ntpd(8), sysctl(8) (HISTORY) ntpd.conf OpenBSD 3.6 . Linux 6.12.107+deb13-amd64 March 2, 2023 Linux 6.12.107+deb13-amd64