* Install the NSClient++ on remote Windows server
1) Download the NSClient++ from its offical download page. Make sure you use the right version for the server processor 32bit/ 64bit. In this sample, I use NSClient++-0.3.8-Win32.zip.
2) Unzip NSClient++-0.3.8-Win32.zip to C:\nsclient++.
3) Open a command prompt and change the path to C:\nsclient++, then run ‘NSclient++.exe –install’ to install it.
4) Edit the C:\nsclient++\ncs.ini file and make the following changes:
- Uncomment all the modules listed in the [modules] section, except for CheckWMI.dll and RemoteConfiguration.dll
- Optionally require a password for clients by changing the ‘password’ option in the [Settings] section.
- Uncomment the ‘allowed_hosts’ option in the [Settings] section. Add the IP address of the Nagios server to this line, or leave it blank to allow all hosts to connect.
- Make sure the ‘port’ option in the [NSClient] section is uncommented and set to ‘12489’ (the default port).
5) In the command prompt type ‘NSclient++.exe –start’. a green corss icon 
will show in the system tray.
* The following configurations need to be made on the Nagios server
1) Uncomment windows.cfg in nagios.cfg
vi /usr/local/nagios/etc/nagios.cfg uncomment the follwing line:
#cfg_file=/usr/local/nagios/etc/objects/windows.cfg
2) Define the host and services in the windows.cfg file
define host{
use windows-server ; Inherit default values from a Windows server template (make sure you keep this line!)
host_name win2003-02
alias My Windows Server
address 10.1.1.104
}
define service{
use generic-service
host_name win2003-02
service_description CPU Load
check_command check_nt!CPULOAD!-l 5,80,90
}
define service{
use generic-service
host_name win2003-02
service_description Memory Usage
check_command check_nt!MEMUSE!-w 80 -c 90
}
define service{
use generic-service
host_name win2003-02
service_description C:\ Drive Space
check_command check_nt!USEDDISKSPACE!-l c -w 80 -c 90
}
3) If you set a password in NSclient++ (mentioned in the 1st part). You need to include the password in the check_nt command definition.
vi /usr/local/nagios/etc/objects/commands.cfg
define command{ command_name check_nt command_line $USER1$/check_nt -H $HOSTADDRESS$ -p 12489 -s REPLACE_WITH_YOUR_PASSWORD -v $ARG1$ $ARG2$ }4) Verify the nagios configuration file (use verinagios command which I mentioned in my previous post).
5) Reload the nagios service.
service nagios reload
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