IMG 1010 - Sample ntp.conf File
- Kelli Higdon
Owned by Kelli Higdon
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The following is a sample ntp.conf file. If you do not have access to the xlntp script, you must modify this file manually. Modify the lines in bold according to your particular network settings.
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#################################################################
# File: ntp.conf
# Generated by: xlntp Revision: 1.1
# Dialogic Corporation 08/11/05_12:53:05
# Dialogic Support @ 781-433-9600Â http://www.dialogic.com/support
#################################################################
# which logfile group... log to /var/log/messages
# Prohibit general access to this service.
restrict default ignore
# Prohibit general access to this service.
restrict default ignore
restrict 66.187.224.4 mask 255.255.255.255 nomodify notrap noquery
restrict 18.26.4.105 mask 255.255.255.255 nomodify notrap noquery
restrict 128.249.1.10 mask 255.255.255.255 nomodify notrap 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
# -- CLIENT NETWORK -----
# Permit systems on this network to synchronize with this
# time service. Do not permit those systems to modify the
# configuration of this service. Also, do not use those
# systems as peers for synchronization.
# restrict 192.168.1.0 mask 255.255.255.0 notrust nomodify notrap
# IMG1
restrict 192.168.0.102 mask 255.255.255.0 notrust nomodify notrap   (Red Hat Enterprise version 4)
restrict 192.168.0.102 mask 255.255.255.0 nomodify notrap           (Red Hat Enterprise version 5)
# --- OUR TIMESERVERS ---
# or remove the default restrict line
# Permit time synchronization with our time source, but do not
# permit the source to query or modify the service on this system.
# restrict mytrustedtimeserverip mask 255.255.255.255 nomodify notrap noquery
# server mytrustedtimeserverip
# --- NTP MULTICASTCLIENT ---
# multicastclient # listen on default 224.0.1.1
# restrict 224.0.1.1 mask 255.255.255.255 notrust nomodify notrap
# restrict 192.168.1.0 mask 255.255.255.0 notrust nomodify notrap
# --- GENERAL CONFIGURATION ---
#
# Undisciplined Local Clock. This is a fake driver intended for backup
# and when no outside source of synchronized time is available. The
# default stratum is usually 3, but in this case we elect to use stratum
# 0. Since the server line does not have the prefer keyword, this driver
# is never used for synchronization, unless no other other
# synchronization source is available. In case the local host is
# controlled by some external source, such as an external oscillator or
# another protocol, the prefer keyword would cause the local host to
# disregard all other synchronization sources, unless the kernel
# modifications are in use and declare an unsynchronized condition.
#
server 127.127.1.0 # local clock
fudge 127.127.1.0 stratum 10
server 66.187.224.4
server 18.26.4.105
server 128.249.1.10
#
# 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
broadcastdelay 0.008
#
# Authentication delay. If you use, or plan to use someday, the
# authentication facility you should make the programs in the auth_stuff
# directory and figure out what this number should be on your machine.
#
authenticate yes
#
# Keys file. If you want to diddle your server at run time, make a
# keys file (mode 600 for sure) and define the key number to be
# used for making requests.
#
# PLEASE DO NOT USE THE DEFAULT VALUES HERE. Pick your own, or remote
# systems might be able to reset your clock at will. Note also that
# ntpd is started with a -A flag, disabling authentication, that
# will have to be removed as well.
#
keys /etc/ ntp/keys |
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