ntp.conf revision 1.6 
1# $NetBSD: ntp.conf,v 1.6 2003/12/07 16:01:00 fredb Exp $
2#
3# NetBSD default Network Time Protocol (NTP) configuration file
4# for ntpd
5
6# Process ID file, so that the daemon can be signalled from scripts
7
8pidfile		/var/run/ntpd.pid
9
10# The correction calculated by ntpd(8) for the local system clock's
11# drift is stored here
12
13driftfile	/var/db/ntp.drift
14
15# suppress the syslog(3) message for each peer synchronization change
16
17logconfig	-syncstatus
18
19# This will help minimize disruptions due to network congestion. Don't
20# do this if you configure only one server!
21
22tos		minsane 2
23
24# Hereafter should be "server" or "peer" statements to configure
25# other hosts to exchange NTP packets with. Peers should be selected
26# in such a way that the network path to them is symmetric (that is,
27# the series of links and routers used to get to the peer is the same
28# one that the peer uses to get back. NTP assumes such symmetry
29# in its network delay calculation. NTP will apply an incorrect
30# adjustment to timestamps received from the peer if the path is not
31# symmetric. This can result in clock skew (your system clock being
32# maintained consistently wrong by a certain amount).
33# 
34# The best way to select symmetric peers is to make sure that the
35# network path to them is as short as possible (this reduces the
36# chance that there is more than one network path between you and
37# your peer). You can measure these distances with the traceroute(8)
38# program. The best place to start looking for NTP peers for your
39# system is within your own network, or at your Internet Service
40# Provider (ISP).
41#
42# Ideally, you should select at least three other systems to talk
43# NTP with, for an "what I tell you three times is true" effect.
44#
45
46#peer		an.ntp.peer.goes.here
47#server		an.ntp.server.goes.here
48
49# Public servers from the pool.ntp.org project. Volunteer's servers
50# are dynamically assigned to the CNAMES below via DNS round-robin.
51# The pool.ntp.org project needs more volunteers! The only criteria to
52# join are a nailed-up connection and a static IP address. For details,
53# see the web page:
54#
55#	http://www.pool.ntp.org/ 
56#
57
58# The country codes can help you find servers that are net-wise close.
59# As explained above, closer is better...
60
61# Northern U.S.A
62#server		ca.pool.ntp.org
63#server		us.pool.ntp.org
64#server		us.pool.ntp.org
65
66# Northern Europe
67#server		de.pool.ntp.org
68#server		de.pool.ntp.org
69#server		dk.pool.ntp.org
70
71# Depending on the vagaries of DNS can occasionally pull in the same
72# server twice. The following CNAMES are guaranteed to be disjoint, at
73# least over some short interval.
74
75server		0.pool.ntp.org
76server		1.pool.ntp.org
77server		2.pool.ntp.org
78