1# 2# 3# Default NTP servers for the FreeBSD operating system. 4# 5# Don't forget to enable ntpd in /etc/rc.conf with: 6# ntpd_enable="YES" 7# 8# The driftfile is by default /var/db/ntpd.drift, check 9# /etc/defaults/rc.conf on how to change the location. 10# 11 12# 13# Set the target and limit for adding servers configured via pool statements 14# or discovered dynamically via mechanisms such as broadcast and manycast. 15# Ntpd automatically adds maxclock-1 servers from configured pools, and may 16# add as many as maxclock*2 if necessary to ensure that at least minclock 17# servers are providing good consistent time. 18# 19tos minclock 3 maxclock 6 20 21# 22# The following pool statements will give you a random set of IPv4 and IPv6 23# NTP servers geographically close to you. A single pool statement adds 24# multiple servers from the pool, according to the tos minclock/maxclock 25# targets. 26# See http://www.pool.ntp.org/ for details. Note, pool.ntp.org encourages 27# users with a static IP and good upstream NTP servers to add a server 28# to the pool. See http://www.pool.ntp.org/join.html if you are interested. 29# 30# The option `iburst' is used for faster initial synchronization. 31# 32pool 0.freebsd.pool.ntp.org iburst 33pool 2.freebsd.pool.ntp.org iburst 34 35# 36# If you want to pick yourself which country's public NTP server 37# you want to sync against, comment out the above pool statements, 38# uncomment the next ones, and replace CC with the country's abbreviation. 39# Make sure that the hostnames resolves to a proper IP address! 40# 41# pool 0.CC.pool.ntp.org iburst 42# pool 2.CC.pool.ntp.org iburst 43 44# 45# To configure a specific server, such as an organization-wide local 46# server, add lines similar to the following. One or more specific 47# servers can be configured in addition to, or instead of, any server 48# pools specified above. When both are configured, ntpd first adds all 49# the specific servers, then adds servers from the pool until the tos 50# minclock/maxclock targets are met. 51# 52#server time.my-internal.org iburst 53 54# 55# Security: 56# 57# By default, only allow time queries and block all other requests 58# from unauthenticated clients. 59# 60# The "restrict source" line allows peers to be mobilized when added by 61# ntpd from a pool, but does not enable mobilizing a new peer association 62# by other dynamic means (broadcast, manycast, ntpq commands, etc). 63# 64# See http://support.ntp.org/bin/view/Support/AccessRestrictions 65# for more information. 66# 67restrict default limited kod nomodify notrap noquery nopeer 68restrict source limited kod nomodify notrap noquery 69 70# 71# Alternatively, the following rules would block all unauthorized access. 72# 73#restrict default ignore 74# 75# In this case, all remote NTP time servers also need to be explicitly 76# allowed or they would not be able to exchange time information with 77# this server. 78# 79# Please note that this example doesn't work for the servers in 80# the pool.ntp.org domain since they return multiple A records. 81# 82#restrict 0.pool.ntp.org nomodify nopeer noquery notrap 83#restrict 1.pool.ntp.org nomodify nopeer noquery notrap 84#restrict 2.pool.ntp.org nomodify nopeer noquery notrap 85# 86# The following settings allow unrestricted access from the localhost 87restrict 127.0.0.1 88restrict ::1 89 90# 91# If a server loses sync with all upstream servers, NTP clients 92# no longer follow that server. The local clock can be configured 93# to provide a time source when this happens, but it should usually 94# be configured on just one server on a network. For more details see 95# http://support.ntp.org/bin/view/Support/UndisciplinedLocalClock 96# The use of Orphan Mode may be preferable. 97# 98#server 127.127.1.0 99#fudge 127.127.1.0 stratum 10 100 101# See http://support.ntp.org/bin/view/Support/ConfiguringNTP#Section_6.14. 102# for documentation regarding leapfile. Updates to the file can be obtained 103# from ftp://time.nist.gov/pub/ or ftp://tycho.usno.navy.mil/pub/ntp/. 104# Use either leapfile in /etc/ntp or periodically updated leapfile in /var/db. 105#leapfile "/etc/ntp/leap-seconds" 106leapfile "/var/db/ntpd.leap-seconds.list" 107 108# Specify the number of megabytes of memory that should be allocated and 109# locked. -1 (default) means "do not lock the process into memory". 110# 0 means "lock whatever memory the process wants into memory". Any other 111# number means to lock up to that number of megabytes into memory. 112# 0 may result in a segfault when ASLR with stack gap randomization 113# is enabled. 114#rlimit memlock 32 115