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+#if $getVar('ntp_server', '') == ""
+ #set $ntp_server = '0.ubuntu.pool.ntp.org'
+#end if
+
+cat << EOF > /etc/ntp.conf
+# 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).
+
+# Include the option tinker panic 0 at the top of your ntp.conf file.
+# By default, the NTP daemon sometimes panics and exits if the underlying clock
+# appears to be behaving erratically. This option causes the daemon to keep
+# running instead of panicking.
+tinker panic 0
+
+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 kod nomodify notrap nopeer noquery
+restrict -6 default kod 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 -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 0.ubuntu.pool.ntp.org
+# server 1.ubuntu.pool.ntp.org
+# server 2.ubuntu.pool.ntp.org
+server $ntp_server
+
+# 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
+
+# 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
+
+# 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
+EOF
+update-rc.d ntp defaults 58 74