General config issues for Nagios3 Rashberry PI

[Box293]

From your Nagios Pi, execute these commands and post back the results:

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/usr/lib/nagios/plugins/check_nt -H xxx -p 12489 -v CLIENTVERSION

/usr/lib/nagios/plugins/check_nt -H xxx -p 12489 -v UPTIME

Where xxx is the IP Address of the machine running NSClient++

[nathanplatt]

Results

pi@raspberrypi ~ $ /usr/lib/nagios/plugins/check_nt -H 192.168.87.83 -p 12489 -v CLIENTVERSION

pi@raspberrypi ~ $ /usr/lib/nagios/plugins/check_nt -H 192.168.87.83 -p 12489 -v UPTIME
could not fetch information from server
pi@raspberrypi ~ $

The first one didn't give me anything... could this be a port issue, our firewalls are very closed, i've requested the ports to be open but maybe that hasn't been done. Can I test the port from Nagios?

Nathan

[nathanplatt]

I've moved my test to a server that won't be affected by a firewall and I'm getting the same issue. Any ideas?

[tgriep]

Run the following from the Nagios system to see if the port is open. You will need to have nmap installed on it.
Replace xxx.xxx.xxx.xxx with the IP address of your windows system.

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nmap -p 12489 xxx.xxx.xxx.xxx

Also, could you post your latest nsclient.ini file?

[nathanplatt]

pi@raspberrypi ~ $ nmap -p 12489 192.168.1.166

Starting Nmap 6.00 ( http://nmap.org ) at 2015-05-12 05:47 UTC
Nmap scan report for 192.168.1.166
Host is up (0.00075s latency).
PORT STATE SERVICE
12489/tcp open unknown

Nmap done: 1 IP address (1 host up) scanned in 0.35 seconds
pi@raspberrypi ~ $

nsclient.ini

[/settings/default]
allowed hosts = 192.168.1.11/255.255.255.0
password = N0rth3dgE!

[/modules]
NSClientServer = 1
CheckSystem = 1
CheckDisk = 1
NRPEServer = 1

[/settings/NRPE/server]
use ssl = 1
payload length = 1024
allow nasty characters = false
allowed ciphers = ADH
ssl = 1
allow arguments = 1
insecure = 1

[Box293]

Great I think we've found the source of your problem and there are two problems.

First, change your allowed hosts to this:

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allowed hosts = 192.168.1.11

If you wanted to allow a whole class C network then you would do this:

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allowed hosts = 192.168.1.0/24

After making that change and restarting the NSClient++ service you should be able to run this on the Nagios host:

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/usr/lib/nagios/plugins/check_nt -H 192.168.87.83 -p 12489 -s 'N0rth3dgE!' -v CLIENTVERSION

Which should return something like:

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NSClient++ 0.4.3.143 2015-04-29

Now the second problem you have is with your password. The ! mark in the password will cause nagios to break, as nagios command directives use the ! to separate arguments.

Just change it in your nsclient.ini file and restart the service.

Then your command definition would be something like:

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define command{
command_name check_nt
command_line $USER1$/check_nt -H $HOSTADDRESS$ -p 12489 -s $ARG1$ -v $ARG2$ $ARG3$
}

Then your service definition would contain the line:

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check_command check_nt!the_password_whatever_it_is!UPTIME

[nathanplatt]

I made all those changes and I'm still getting errors, same as before no response from server. I've had a nightmare install of this as its running on a raspberry PI using the apt-get install Nagios3 and then manually installing the plugins.

Any other advice?

[nathanplatt]

Correction... that has worked! Will I be able to use this for CPU monitoring and Disk space etc?

Thank you for all the help!

[jdalrymple]

Correction... that has worked! Will I be able to use this for CPU monitoring and Disk space etc?

Thank you for all the help!

Yes. To get a basic understanding check out this:

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/usr/lib/nagios/plugins/check_nt --help

If you need further help with this please open a new topic. I think the problem that this thread was opened for is now solved and we should lock it. Is that OK?

[nathanplatt]

Yes, solved, thank you