NTP : Configure NTP Server2019/09/30 |
|
Install Chrony to Configure NTP Server for Time Synchronization.
|
|
| [1] | Install and Configure Chrony. |
|
[root@dlp ~]#
dnf -y install chrony
[root@dlp ~]#
vi /etc/chrony.conf # line 3: change servers to synchronize (replace to your own timezone NTP server) # need NTP server itself to sync time with other NTP server # pool 2.centos.pool.ntp.org iburst
pool ntp.nict.jp iburst
# line 24: add network range to allow to receive time synchronization requests from NTP Clients # specify your local network and so on # if not specified, only localhost is allowed
allow 10.0.0.0/24
systemctl enable --now chronyd |
| [2] | If Firewalld is running, allow NTP service. NTP uses [123/UDP]. |
|
[root@dlp ~]# firewall-cmd --add-service=ntp --permanent success [root@dlp ~]# firewall-cmd --reload success |
| [3] | Verify it works normally. |
|
[root@dlp ~]# chronyc sources 210 Number of sources = 4 MS Name/IP address Stratum Poll Reach LastRx Last sample =============================================================================== ^+ ntp-a2.nict.go.jp 1 6 17 26 -3065us[-3065us] +/- 16ms ^* ntp-b2.nict.go.jp 1 6 17 27 -214us[ -910us] +/- 11ms ^- ntp-b3.nict.go.jp 1 6 17 26 +552us[ +552us] +/- 9773us ^- ntp-a3.nict.go.jp 1 6 17 26 +1251us[+1251us] +/- 8182us |