Can't get check_nrpe to work on Windows host

[craigtho]

Updated as requested - I did comment out your example password as my server isn't configured to use one:

nsclient.ini

(9.42 KiB) Downloaded 98 times

On Nagios Server:

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root@glamon2:/usr/local/nagios/libexec# ./check_nrpe -H 192.168.60.41 -p 5666
CHECK_NRPE: (ssl_err != 5) Error - Could not complete SSL handshake with 192.168.60.41: 1
root@glamon2:/usr/local/nagios/libexec#

Following this, I edited it to say use ssl = 0 as I'm not using SSL in my configuration (yet):

nsclient.ini

nsclient.ini - edited

(9.42 KiB) Downloaded 99 times

Then on the Nagios Server:

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root@glamon2:/usr/local/nagios/libexec# ./check_nrpe -H 192.168.60.41 -p 5666
CHECK_NRPE: (ssl_err != 5) Error - Could not complete SSL handshake with 192.168.60.41: 1
root@glamon2:/usr/local/nagios/libexec#

Even after the change (and nsclient has been restarted 3 times for good measure)

[scottwilkerson]

If you aren't using ssl you need to add a -n to the command

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./check_nrpe -H 192.168.60.41 -p 5666 -n

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-n, --no-ssl                 Do no use SSL

[craigtho]

Okay, thank you for your help by the way.

So I reverted that change, restarted NSClient++ and ran:

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root@glamon2:/usr/local/nagios/libexec# ./check_nrpe -H 192.168.60.41 -p 5666 -n
CHECK_NRPE: Receive header underflow - only 0 bytes received (4 expected).

At least we are getting a new error now. But sadly, still not working...I've never even seen this before.

[scottwilkerson]

Let's also try to add a -2 for version 2 packets

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./check_nrpe -H 192.168.60.41 -p 5666 -n -2

[craigtho]

Sadly, just the same response:

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root@glamon2:/usr/local/nagios/libexec# ./check_nrpe -H 192.168.60.41 -p 5666 -n -2
CHECK_NRPE: Receive header underflow - only 0 bytes received (4 expected).

[craigtho]

Any more help would be greatly appreciated.

I've tried changing some settings and hotswapping Scott's settings with my own and continually get the same errors. I've reverted back to my last post and still getting the same errors.

[craigtho]

Update: Possible Fix

NSClient.ini here:

nsclient.ini

(9.44 KiB) Downloaded 145 times

I changed ssl options = & verify mode = none

and then on the Nagios server:

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root@glamon2:/usr/local/nagios/libexec# ./check_nrpe -H 192.168.60.41 -n
I (0,4,1,73 2012-12-17) seem to be doing fine...

However:

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root@glamon2:/usr/local/nagios/libexec# ./check_nrpe -H 192.168.60.41 -n -c check_memory -a 'warn=free<20%' 'crit=free<10%'
CHECK_NRPE: No output returned from daemon.
root@glamon2:/usr/local/nagios/libexec#

Could be that this is an output due to me using Scott's config file for testing? Any advice?

[craigtho]

Final Update:

My command parameter was wrong:

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root@glamon2:/usr/local/nagios/libexec# ./check_nrpe -H 192.168.60.41 -n -c CheckCPU -a warn=80 crit=90 time=20m time=10s time=4
OK CPU Load ok.|'20m'=2%;80;90 '10s'=2%;80;90 '4'=7%;80;90

I think that means case is closed? Unless anything else with the .ini file needs changed that you someone can recommend.

[scottwilkerson]

Final Update:

My command parameter was wrong:

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root@glamon2:/usr/local/nagios/libexec# ./check_nrpe -H 192.168.60.41 -n -c CheckCPU -a warn=80 crit=90 time=20m time=10s time=4
OK CPU Load ok.|'20m'=2%;80;90 '10s'=2%;80;90 '4'=7%;80;90

I think that means case is closed? Unless anything else with the .ini file needs changed that you someone can recommend.

Great!

Glad it is resolved!

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