Nagios Support Forum

Can you post your entire nsclient.ini file for us to look at? I'd like to lab this up on my end.

I have attached the configuration file. Please find that.

Thanks for the INI file, it should work for you.

Can you login to the Nagios server as root, run the following commands and post the output? Replace xxx.xxx.xxx.xxx with the IP address of your Windows host.

Thank you for your response.

Please find below the requested results.

[root@server~]# nmap xx.xx.xx.xx -p 5666

Starting Nmap 5.51 ( http://nmap.org ) at 2016-07-18 17:25 SGT
Nmap scan report for xx.xx.xx.xx
Host is up (0.078s latency).
PORT STATE SERVICE
5666/tcp open nrpe

Nmap done: 1 IP address (1 host up) scanned in 0.36 seconds

[root@server~]# /usr/local/nagios/libexec/check_nrpe -H xx.xx.xx.xx -t 60
CHECK_NRPE: Socket timeout after 60 seconds.

Try editing your nsclient.ini file and under this section Add the following Restart the NSClient++ service.
This should disable the SSL options and hopefully is fixes the issue.

Them run this again and if it fails, look at the nsclient.log file for any errors and post them here.

Thank you for your response.

I have edited the Nsclient.ini file as u suggested and restarted the Nsclient service. But still the issue persist.

[root@server~]# /usr/local/nagios/libexec/check_nrpe -H xx.xx.xx.xx -t 60
CHECK_NRPE: Socket timeout after 60 seconds.

And I do not find any error message in the Nsclient log file for today but some error message entries some days before(pasted the entries below).

2016-07-11 15:19:00: error:D:\source\nscp\include\socket/connection.hpp:137: Failed to read data: The I/O operation has been aborted because of either a thread exit or an application request
2016-07-11 15:19:00: error:D:\source\nscp\include\socket/connection.hpp:137: Failed to read data: The I/O operation has been aborted because of either a thread exit or an application request
2016-07-11 15:19:00: error:D:\source\nscp\include\socket/connection.hpp:137: Failed to read data: The I/O operation has been aborted because of either a thread exit or an application request
2016-07-19 17:06:06: error:D:\source\nscp\include\socket/connection.hpp:137: Failed to read data: An existing connection was forcibly closed by the remote host

The only thing left to try is to uninstall the nsclient and delete the folders and reinstall the latest stable 4.x version, something may be corrupted.
If you do this, make sure you install the client with legacy SSL.

Hi,

Thank you for your response.

How to install the client with Legacy SSL?

On the latest 0.4.x version, the option is "Insecure legacy mode"

Hi,

Thank you so much for your response.

I tried uninstalling and reinstalling the Nsclient by selecting the Insecure legacy mode. Still i'm facing the same issue.

I have attached the screenshot and the Nsclient configuration file for your reference.