Nagios Support Forum

Hello, first time here on the forum. Been using nagios for 2-3 years.
While trying to help the community, by doing tutorial video about making a complete system from nagios core. graph+ notification...
I'm having a problem that seem easy but I cannot go through.

Install the lastest nagios and pluging in a new VM ubuntu 18.04 and NSClient++ on another Windows 10.

I'm able to check the server itself by doing the following command. When I try to do the same thing on the Windows host with NSClient it's giming me this error.
I've tried a working configuration and it still doing the same error. I even try to downgrade the NSClient Version to 4.xxxx . So I don't think it's a NSClient issue. Someone has an idea?



Here the basic config of NSClient. 192.168.7.157 = Nagios test server.
192.168.7.177 = Windows 10 + NSClient.

Here's a post from @lmiltchev in the customer support section:
https://support.nagios.com/forum/viewto ... 09#p258830

lmiltchev wrote: Try the following:

1. Commend out these two lines in nsclient.ini file:

Code: Select all

; ssl options = no-sslv2,no-sslv3
; verify mode = peer-cert

2. Add the following line under the [/settings/NRPE/server] section:

Code: Select all

allowed ciphers = ALL:!MD5:@STRENGTH

3. Save, exit, and restart the nsclient++ service.

Did this help?

Give those a try and let us know if they don't work.

Thanks @mcapra for the help.

The ssl setting for NRPE is missing so under this section Add this Save the file and restart NSClient++ which will make sure SSL is enabled in the agent.
Also, make sure port 5666 is enabled through the firewall.

If it still doesn't work, post the errors from the nsclient.log file on the Windows system to the post so we can view them.