--- /dev/null
+# Checks the selected NTP server.
+# DEPRECATED: use check_ntp_time or check_ntp_peer
+define command {
+ command_name check_ntp
+ command_line $USER1$/check_ntp -H $HOSTADDRESS$ $ARG1$
+}
+
+# Checks the clock offset with the NTP server.
+define command {
+ command_name check_ntp_time
+ command_line $USER1$/check_ntp_time -H $HOSTADDRESS$ $ARG1$
+}
+
+# Check the health of an NTP server.
+define command {
+ command_name check_ntp_peer
+ command_line $USER1$/check_ntp_peer -H $HOSTADDRESS$ $ARG1$
+}
+
+define service {
+ use generic-service
+ name ntp
+ service_description ntp
+ register 0
+
+ normal_check_interval 30
+ notification_interval 120
+
+ check_command check_ntp
+}
+
+define service {
+ use ntp
+ name ntp_time
+ service_description ntp_time
+ register 0
+
+ check_command check_ntp_time
+}
+
+define service {
+ use ntp
+ name ntp_peer
+ service_description ntp_peer
+ register 0
+
+ check_command check_ntp_peer
+}