--- /etc/ntp.conf.orig	2017-12-30 02:35:45.487712787 +0000
+++ /etc/ntp.conf	2017-12-31 05:25:28.673876659 +0000
@@ -3,24 +3,30 @@
 driftfile /var/lib/ntp/ntp.drift
 
 # Enable this if you want statistics to be logged.
-#statsdir /var/log/ntpstats/
+statsdir /var/log/ntpstats/
 
-statistics loopstats peerstats clockstats
+#statistics loopstats peerstats clockstats
+#filegen loopstats file loopstats type day enable
+#filegen peerstats file peerstats type day enable
+#filegen clockstats file clockstats type day enable
+statistics loopstats sysstats
 filegen loopstats file loopstats type day enable
-filegen peerstats file peerstats type day enable
-filegen clockstats file clockstats type day enable
+filegen sysstats file sysstats type day enable
 
 
 # You do need to talk to an NTP server or two (or three).
 #server ntp.your-provider.example
+server 127.127.20.0 mode 17 minpoll 4 maxpoll 4 prefer
+fudge 127.127.20.0 refid GPS
+fudge 127.127.20.0 flag1 1 flag3 1
 
 # pool.ntp.org maps to about 1000 low-stratum NTP servers.  Your server will
 # pick a different set every time it starts up.  Please consider joining the
 # pool: <http://www.pool.ntp.org/join.html>
-pool 0.debian.pool.ntp.org iburst
-pool 1.debian.pool.ntp.org iburst
-pool 2.debian.pool.ntp.org iburst
-pool 3.debian.pool.ntp.org iburst
+#pool 0.debian.pool.ntp.org iburst
+#pool 1.debian.pool.ntp.org iburst
+#pool 2.debian.pool.ntp.org iburst
+#pool 3.debian.pool.ntp.org iburst
 
 
 # Access control configuration; see /usr/share/doc/ntp-doc/html/accopt.html for