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+# Permit time synchronization with our time source, but do not
+# permit the source to query or modify the service on this system.
+restrict default kod nomodify notrap
+restrict -6 default kod nomodify notrap
+
+# 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 -6 ::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 $SERVERA
+server $SERVERB
+server $SERVERC
+
+#broadcast 192.168.1.255 key 42 # broadcast server
+#broadcastclient # broadcast client
+#broadcast 224.0.1.1 key 42 # multicast server
+#multicastclient 224.0.1.1 # multicast client
+#manycastserver 239.255.254.254 # manycast server
+#manycastclient 239.255.254.254 key 42 # manycast client
+
+# Undisciplined Local Clock. This is a fake driver intended for backup
+# and when no outside source of synchronized time is available.
+server 127.127.1.0 # local clock
+#fudge 127.127.1.0 stratum 10
+
+# Drift file. Put this in a directory which the daemon can write to.
+# No symbolic links allowed, either, since the daemon updates the file
+# by creating a temporary in the same directory and then rename()'ing
+# it to the file.
+driftfile /var/lib/ntp/drift
+
+# 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