NTP : Configure NTP Server2021/11/04 |
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Install Chrony to Configure NTP Server for Time Synchronization.
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| [1] | Install and Configure Chrony. |
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[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 27: 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]. |
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[root@dlp ~]# firewall-cmd --add-service=ntp success [root@dlp ~]# firewall-cmd --runtime-to-permanent success |
| [3] | Verify it works normally. |
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[root@dlp ~]# chronyc sources MS Name/IP address Stratum Poll Reach LastRx Last sample =============================================================================== ^+ ntp-a3.nict.go.jp 1 6 17 3 +171us[ +843us] +/- 8339us ^* ntp-a2.nict.go.jp 1 6 17 4 +304us[ +976us] +/- 8983us ^+ ntp-b3.nict.go.jp 1 6 17 4 -2654us[-1982us] +/- 11ms ^- ntp-b2.nict.go.jp 1 6 17 3 -1036us[-1036us] +/- 9465us |
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