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1# For more information about this file, see the man pages
2# ntp.conf(5), ntp_acc(5), ntp_auth(5), ntp_clock(5), ntp_misc(5), ntp_mon(5).
3
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4# Drift file. Put this in a directory which the daemon can write to.
5# No symbolic links allowed, either, since the daemon updates the file
6# by creating a temporary in the same directory and then rename()'ing
7# it to the file.
8driftfile /var/lib/ntp/drift
9
10# This command loads the NIST leapseconds file and initializes the leapsecond
11# values for the next leapsecond time, expiration time and TAI offset. The file
12# can be obtained directly from NIST national time servers using ftp as the
13# ASCII file pub/leap-seconds.
14leapfile /etc/ntp/ntp.leapseconds
15
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16# Permit time synchronization with our time source, but do not
17# permit the source to query or modify the service on this system.
8ee97dcb 18restrict default kod limited nomodify notrap nopeer noquery
19restrict -6 default kod limited nomodify notrap nopeer noquery
7cbf232a 20
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21# Permit all access over the loopback interface. This could
22# be tightened as well, but to do so would effect some of
23# the administrative functions.
7d4a7cf3 24restrict 127.0.0.1
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25restrict -6 ::1
26
27# Hosts on local network are less restricted.
28#restrict 192.168.1.0 mask 255.255.255.0 nomodify notrap
7d4a7cf3 29
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30# restrict default ignore
31# restrict ntp.example.com noquery noserve
32# restrict ntp.example.net noquery noserve
33# restrict 127.0.0.1
34# restrict 127.127.1.0
91f83bd9 35
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36# Undisciplined Local Clock. This is a fake driver intended for backup
37# and when no outside source of synchronized time is available. The
38# default stratum is usually 3, but in this case we elect to use stratum
39# 0. Since the server line does not have the prefer keyword, this driver
40# is never used for synchronization, unless no other other
41# synchronization source is available. In case the local host is
42# controlled by some external source, such as an external oscillator or
43# another protocol, the prefer keyword would cause the local host to
44# disregard all other synchronization sources, unless the kernel
45# modifications are in use and declare an unsynchronized condition.
143625c2 46
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47server 127.127.1.0 # local clock
48fudge 127.127.1.0 stratum 10
143625c2 49
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50# multicastclient 224.0.1.1 # listen on default 224.0.1.1
51broadcastdelay 0.008
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52
53#
54# Authentication delay. If you use, or plan to use someday, the
55# authentication facility you should make the programs in the auth_stuff
56# directory and figure out what this number should be on your machine.
263e8815 57disable auth
91f83bd9 58
ca429a5e 59# Key file containing the keys and key identifiers used when operating
0251f18b 60# with symmetric key cryptography.
fae2c635 61#keys /etc/ntp/keys
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62
63# Specify the key identifiers which are trusted.
64#trustedkey 4 8 42
65
66# Specify the key identifier to use with the ntpdc utility.
67#requestkey 8
68
69# Specify the key identifier to use with the ntpq utility.
70#controlkey 8
71
72# Enable writing of statistics records.
73#statistics clockstats cryptostats loopstats peerstats
2786e2b8 74
8ee97dcb 75# NTP pool project. See: http://www.pool.ntp.org/
76pool pool.ntp.org
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