diff --git a/ntp/ntp.conf b/ntp/ntp.conf
index 2a80c4f6d..ce769e3bb 100644
--- a/ntp/ntp.conf
+++ b/ntp/ntp.conf
@@ -20,6 +20,9 @@ restrict default noquery nopeer
 restrict 127.0.0.1
 restrict ::1
 
+# avoid udp spoofed ddos attacks
+disable monitor
+
 # Now list the NTP clients on our home network which should be able to query
 # our server for the time (notice that the noquery has been removed)
 #