CentOS 7.0 NTP Service Setup

NTP Service time synchronization

Turn off firewalls and SELinux or turn on all firewall services

[Email protected] ~]# firewall-cmd --set-default-zone=trusted

NTP service

[[email protected] ~]# yum–y install NTP

[email protected] ~]# cat /etc/ntp. conf //Modify configuration file //define native sync time with yourself

Restrict 176.20.32.0 mask 255.255.255.0 nomodify //allow which hosts sync time

#server 0.rhel.pool.ntp.org Iburst

#server 1.rhel.pool.ntp.org Iburst

#server 2.rhel.pool.ntp.org Iburst

#server 3.rhel.pool.ntp.org Iburst

Server 127.127.1.0 iburst//define native sync time with yourself

Fudge 127.127.1.0 Stratum 3

Includefile/etc/ntp/crypto/pw

Keys/etc/ntp/keys

Disable Monitor

Client-side Test NTP service

[Email protected] ~]# ntpdate 172.25.0.254

Jul: ntpdate[6052]: Adjust time server 172.25.0.254 offset 0.031270 sec//Table Test success

CentOS 7.0 NTP Service Setup