ntp.conf revision 1.19 
1# $NetBSD: ntp.conf,v 1.19 2014/01/14 13:23:46 apb Exp $
2#
3# NetBSD default Network Time Protocol (NTP) configuration file for ntpd
4
5# This file is intended to be both a usable default, and a Quick-Start
6# Guide. The directives and options listed here are not at all complete.
7# A great deal of additional documentation, including links to FAQS and
8# other guides, may be found on the official NTP web site, in particular
9#
10#	http://www.ntp.org/documentation.html
11#
12
13# Process ID file, so that the daemon can be signalled from scripts
14
15pidfile		/var/run/ntpd.pid
16
17# The correction calculated by ntpd(8) for the local system clock's
18# drift is stored here.
19
20driftfile	/var/db/ntp.drift
21
22# Suppress the syslog(3) message for each peer synchronization change.
23
24logconfig	-syncstatus
25
26# Refuse to set the local clock if there are too few good peers or servers.
27# This may help minimize disruptions due to network congestion. Don't
28# do this if you configure only one server!
29
30tos		minsane 2
31
32# Set the number of tries to register with mdns. 0 means never
33#
34mdnstries	0
35
36# New ntpd disables the ntpdc protocol by default, to re-enable uncomment
37# the following line
38# enable mode7
39
40# Access control restrictions.
41# See /usr/share/doc/html/ntp/accopt.html for syntax.
42# See <http://support.ntp.org/bin/view/Support/AccessRestrictions> for advice.
43# Last match wins.
44#
45# Some of the more common keywords are:
46#   ignore      Deny packets of all kinds.
47#   kod         Send "kiss-o'-death" packets if clients exceed rate
48#               limits.
49#   nomodify    Deny attempts to modify the state of the server via
50#               ntpq or ntpdc queries.
51#   noquery     Deny all ntpq and ntpdc queries.  Does not affect time
52#               synchronisation.
53#   nopeer      Prevent establishing new peer associations.
54#               Does not affect peers configured using "peer" lines.
55#               Does not affect client/server time synchronisation.
56#   noserve     Deny all time synchronisation.  Does not affect ntpq or
57#               ntpdc queries.
58#   notrap      Deny the trap subset of the ntpdc control message protocol.
59#   notrust     Deny packets that are not cryptographically authenticated.
60#
61# By default, allow client/server time exchange without prior
62# arrangement, but deny configuration changes, queries, and peer
63# associations that were not explicitly configured.
64#
65restrict default kod nopeer noquery
66
67# Fewer restrictions for the local subnet.
68# (Uncomment and adjust as appropriate.)
69#
70#restrict 192.0.2.0 mask 255.255.255.0 kod nomodify notrap nopeer
71#restrict 2001:db8:: mask ffff:ffff::  kod nomodify notrap nopeer
72
73# No restrictions for localhost.
74#
75restrict 127.0.0.1
76restrict ::1
77
78# Hereafter should be "server" or "peer" statements to configure other
79# hosts to exchange NTP packets with.
80#
81# See <http://support.ntp.org/bin/view/Support/DesigningYourNTPNetwork>
82# and <http://support.ntp.org/bin/view/Support/SelectingOffsiteNTPServers>
83# for advice.
84#
85# Peers or servers should be selected in such a way that the network
86# path to them is short, uncongested, and symmetric (that is, the series
87# of links and routers used to get to the peer is the same one that
88# the peer uses to get back).  The best place to start looking for NTP
89# peers for your system is within your own network, or at your Internet
90# Service Provider (ISP).
91#
92# Ideally, you should select at least three other systems to talk NTP
93# with, for an "what I tell you three times is true" effect.
94
95#peer		an.ntp.peer.goes.here
96#server		an.ntp.server.goes.here
97
98# The pool.ntp.org project coordinates public time servers provided by
99# volunteers.  See <http://www.pool.ntp.org>.  The *.netbsd.pool.ntp.org
100# servers are intended to be used by default on NetBSD hosts, but
101# servers that are closer to you are likely to be better.  Consider
102# using servers specific to your country, a nearby country, or your
103# continent.
104#
105# The pool.ntp.org project needs more volunteers! The only criteria to
106# join are a nailed-up connection and a static IP address. For details,
107# see the web page:
108#
109#	http://www.pool.ntp.org/join.html
110#
111
112server		0.netbsd.pool.ntp.org
113server		1.netbsd.pool.ntp.org
114server		2.netbsd.pool.ntp.org
115server		3.netbsd.pool.ntp.org
116