Rocky_Linux_8
Sponsored Link

NTP : Configure NTP Server2021/07/19

 
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
[root@dlp ~]#
systemctl enable --now chronyd

[2] If Firewalld is running, allow NTP service. NTP uses [123/UDP].
[root@dlp ~]#
firewall-cmd --add-service=ntp

success
[root@dlp ~]#
firewall-cmd --runtime-to-permanent

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-b2.nict.go.jp             1   6    17     3   -947us[ -947us] +/-   11ms
^- ntp-k1.nict.jp                1   6    17     4   -874us[ -874us] +/- 7094us
^* ntp-b3.nict.go.jp             1   6    17     5   -646us[ -709us] +/-   10ms
^- ntp-a3.nict.go.jp             1   6    17     5  +1433us[+1433us] +/- 7918us
Matched Content