Configuração do NTPd :NTP Server no Centos 7

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1º) Instale o NTPd.

yum -y install ntp
vi /etc/ntp.conf
# line 18: add the network range you allow to receive requests
restrict 10.0.0.0 mask 255.255.255.0 nomodify notrap
# change servers for synchronization
#server 0.centos.pool.ntp.org iburst
#server 1.centos.pool.ntp.org iburst
#server 2.centos.pool.ntp.org iburst
#server 3.centos.pool.ntp.org iburst
server ntp1.jst.mfeed.ad.jp iburst
server ntp2.jst.mfeed.ad.jp iburst
server ntp3.jst.mfeed.ad.jp iburst
:wq sair do vim
systemctl start ntpd
systemctl enable ntpd

2º) Se o Firewalld estiver em execução, permita o serviço NTP. NTP usa 123 / UDP.
firewall-cmd –add-service=ntp –permanent
firewall-cmd –reload
[3] Verifique se funciona normalmente como segue.


root@dlp ~]#

ntpq -p

 

     remote           refid      st t when poll reach   delay   offset  jitter
==============================================================================
+ntp1.jst.mfeed. 172.29.1.100     2 u   29   64    1   18.826   -0.126   0.000
+ntp2.jst.mfeed. 172.29.2.50      2 u   28   64    1   21.592    0.018   0.000
*ntp3.jst.mfeed. 133.243.236.18   2 u   28   64    1   22.666   -1.033   0.000