We have two Linux Machines one machine is Server  and one machine is Client

Server Machine 192.168.1.50 baber

Cleint Machine  192.168.1.60 farrukh

Server side configuration on CentOS /RHEL /Fedora

root@localhost# vi /etc/ntp.conf
# Permit time synchronization with our time source, but do not
# permit the source to query or modify the service on this system.
 restrict default kod nomodify notrap nopeer noquery
# Permit all access over the loopback interface. This could
 # be tightened as well, but to do so would effect some of
 # the administrative functions.
 restrict 127.0.0.1
# Hosts on local network are less restricted.
 #restrict 192.168.1.0 mask 255.255.255.0 nomodify notrap
# Use public servers from the pool.ntp.org project.
 # Please consider joining the pool (http://www.pool.ntp.org/join.html).
### Edited By Babar Zahoor Jun 16 2009 ###
 #server 0.centos.pool.ntp.org
 #server 1.centos.pool.ntp.org
 #server 2.centos.pool.ntp.org
#broadcast 192.168.1.255 key 42 # broadcast server
 #broadcastclient # broadcast client
 #broadcast 224.0.1.1 key 42 # multicast server
 #multicastclient 224.0.1.1 # multicast client
 #manycastserver 239.255.254.254 # manycast server
 #manycastclient 239.255.254.254 key 42 # manycast client
# Undisciplined Local Clock. This is a fake driver intended for backup
 # and when no outside source of synchronized time is available.
########## for server use this and on clients comment this and use server serverIP ##################
server 127.127.1.0 # local clock
#fudge 127.127.1.0 stratum 10
# Drift file. Put this in a directory which the daemon can write to.
 # No symbolic links allowed, either, since the daemon updates the file
 # by creating a temporary in the same directory and then rename()’ing
 # it to the file.
 # driftfile /var/lib/ntp/drift
# Key file containing the keys and key identifiers used when operating
 # with symmetric key cryptography.
 # Specify the key identifiers which are trusted.
 # trustedkey 4 8 42
# Specify the key identifier to use with the ntpdc utility.
 # requestkey 8
# Specify the key identifier to use with the ntpq utility.
 #controlkey 8
 keys /etc/ntp/keys
save quit.
[root@baber ~]#
 [root@baber ~]# /etc/init.d/ntpd start
 [root@baber ~]# chkconfig –level 235 ntpd on

Client Side Configuration on NTP Client Machines

[root@farrukh ~]# vim ntp.conf
 # Permit time synchronization with our time source, but do not
 # permit the source to query or modify the service on this system.
 restrict default kod nomodify notrap nopeer noquery
# Permit all access over the loopback interface. This could
 # be tightened as well, but to do so would effect some of
 # the administrative functions.
 #restrict 127.0.0.1
 #estrict -6 ::1
# Hosts on local network are less restricted.
 #restrict 192.168.1.0 mask 255.255.255.0 nomodify notrap
# Use public servers from the pool.ntp.org project.
 # Please consider joining the pool (http://www.pool.ntp.org/join.html).
server 192.168.1.50 ### add this line on second server ###
#server 0.centos.pool.ntp.org
 #server 1.centos.pool.ntp.org
 #server 2.centos.pool.ntp.org
#broadcast 192.168.1.255 key 42 # broadcast server
 #broadcastclient # broadcast client
 #broadcast 224.0.1.1 key 42 # multicast server
 #multicastclient 224.0.1.1 # multicast client
 #manycastserver 239.255.254.254 # manycast server
 #manycastclient 239.255.254.254 key 42 # manycast client
# Undisciplined Local Clock. This is a fake driver intended for backup
 # and when no outside source of synchronized time is available.
#server 127.127.1.0 # local clock ##### #####
 #fudge 127.127.1.0 stratum 10
# Drift file. Put this in a directory which the daemon can write to.
 # No symbolic links allowed, either, since the daemon updates the file
 # by creating a temporary in the same directory and then rename()’ing
 # it to the file.
 driftfile /var/lib/ntp/drift
# Key file containing the keys and key identifiers used when operating
 # with symmetric key cryptography.
 keys /etc/ntp/keys
# Specify the key identifiers which are trusted.
 #trustedkey 4 8 42
# Specify the key identifier to use with the ntpdc utility.
 #requestkey 8
# Specify the key identifier to use with the ntpq utility.
 #controlkey 8
save & exit
[root@farrukh ~]# /etc/init.d/ntpd start
 [root@farrukh ~]# chkconfig –level 235 ntpd on
[root@farrukh ~]# ntpdate -u 192.168.1.50
[root@farrukh ~]# watch ntpq -p -n
[root@baber ~]# watch ntpq -p -n

 

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