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# For more information about this file, see the man pages | |
# ntp.conf(5), ntp_acc(5), ntp_auth(5), ntp_clock(5), ntp_misc(5), ntp_mon(5). | |
driftfile /var/lib/ntp/drift | |
# Permit time synchronization with our time source, but do not | |
# permit the source to query or modify the service on this system. | |
restrict default nomodify notrap nopeer 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 | |
restrict ::1 | |
# Hosts on local network are less restricted. | |
#restrict 192.168.1.0 mask 255.255.255.0 nomodify notrap | |
# Use public servers from the pool.ntp.org project. | |
# Please consider joining the pool (http://www.pool.ntp.org/join.html). | |
server 0.us.pool.ntp.org iburst | |
server 1.us.pool.ntp.org iburst | |
server 2.us.pool.ntp.org iburst | |
server 3.us.pool.ntp.org iburst | |
#broadcast 192.168.1.255 autokey # broadcast server | |
#broadcastclient # broadcast client | |
#broadcast 224.0.1.1 autokey # multicast server | |
#multicastclient 224.0.1.1 # multicast client | |
#manycastserver 239.255.254.254 # manycast server | |
#manycastclient 239.255.254.254 autokey # manycast client | |
# Enable public key cryptography. | |
#crypto | |
includefile /etc/ntp/crypto/pw | |
# Key file containing the keys and key identifiers used when operating | |
# with symmetric key cryptography. | |
keys /etc/ntp/keys | |
# Specify the key identifiers which are trusted. | |
#trustedkey 4 8 42 | |
# Specify the key identifier to use with the ntpdc utility. | |
#requestkey 8 | |
# Specify the key identifier to use with the ntpq utility. | |
#controlkey 8 | |
# Enable writing of statistics records. | |
#statistics clockstats cryptostats loopstats peerstats | |
# Disable the monitoring facility to prevent amplification attacks using ntpdc | |
# monlist command when default restrict does not include the noquery flag. See | |
# CVE-2013-5211 for more details. | |
# Note: Monitoring will not be disabled with the limited restriction flag. | |
disable monitor | |
# Add logfile | |
logfile /var/log/ntp.log |