Nagios Support Forum

Hi,

This is regarding NTP service. NTP service definition is using the command check_ntp_time command.

It's usage is

./check_ntp_time -H $HOST -w $WARN -c $CRIT

We are getting different results for different hosts.

For example host1

[nagiosserver]# ./check_ntp_time -H host1 -w 1 -c 5
CRITICAL: No response from NTP server

and for host2

nagiosserver]# ./check_ntp_time -H host2 -w 1 -c 5
NTP OK: Offset -6.794929504e-06 secs|offset=-0.000007s;1.000000;5.000000;

Showing correct results for host2

what needs to be configured on host1 to make it working for host1.

Maybe there is something blocking your Nagios server from communicating with host1? You can try this command,
It should return that the port is open.

I tried the command

nmap -sU host1 -p 123

Getting following error.

-bash: nmap: command not found

#which nmap
no nmap in (paths)

Please suggest

You should be able to add the command with then you can run the commands above