Check_TCP Plugin - Windows Server 2019

[DerekNagiosXI]

Good Afternoon,

Have the check_tcp on the windows server under C:\Program Files (x86)\Nagios\NCPA\plugins
Running into error - UNKNOWN: An error occurred connecting to API. (HTTP error: '500 INTERNAL SERVER ERROR')
Here is $ARG1$ parameter - -t 'xxxx' -P 5693 -M 'plugins/check_tcp' -q 'args=-H [email protected] -p xx'
I believe my context in $ARG1$ needs to be modified, this plugin is working great on linux servers.
I do know that for the linux servers, i have to run chown nagios so my question is, could my error be due to permissions for the windows server?
Thanks for your help.

[pbroste]

Hello @DerekNagiosXI

Thanks for reaching out on 'check_tcp' plugin 500 error condition.

Want to verify that we are able to view the 'ncpa' web console:

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https://yourwindowsserver2019:5693

• 

For raw api results:

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curl -k https://yourwindowsserver2019:5693/api/plugins/check_tcp.exe?args=-H localhost&args=-p 5693&args=-c 22&args=-w 3

To verify from Linux command line from your Nagios XI instance:

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/usr/local/nagios/libexec/check_ncpa.py -H yourwindowsserver2019 -t welcome -M 'plugins/check_tcp' -q 'args= -H hosttocheckhere -p 5693'

Allow hosts in the 'ncpa.cfg' configured to allow found in the /nagios/ncpa/etc/ directory:

allowed_hosts = xxx.xxx.xxx.0/24

For testing purposes, I gave "everyone" full access permissions on the '/plugin/check_tcp'.

Let us know how things look,
Perry

[DerekNagiosXI]

Hello @DerekNagiosXI

Thanks for reaching out on 'check_tcp' plugin 500 error condition.

Want to verify that we are able to view the 'ncpa' web console:

Code: Select all

https://yourwindowsserver2019:5693

• 

For raw api results:

Code: Select all

curl -k https://yourwindowsserver2019:5693/api/plugins/check_tcp.exe?args=-H localhost&args=-p 5693&args=-c 22&args=-w 3

To verify from Linux command line from your Nagios XI instance:

Code: Select all

/usr/local/nagios/libexec/check_ncpa.py -H yourwindowsserver2019 -t welcome -M 'plugins/check_tcp' -q 'args= -H hosttocheckhere -p 5693'

Allow hosts in the 'ncpa.cfg' configured to allow found in the /nagios/ncpa/etc/ directory:

allowed_hosts = xxx.xxx.xxx.0/24

For testing purposes, I gave "everyone" full access permissions on the '/plugin/check_tcp'.

Let us know how things look,
Perry

Thank you for the reply. Confirmed I am able to view NCPA web console.
Updated allow hosts in the ncpa.cfg and error message changed to
UNKNOWN: An error occured connecting to API. (HTTP error: '403 FORBIDDEN')
Verified token is correct.

Tried redownloading check_ncpa and replacing on my server. Please advise.

[pbroste]

Hello @DerekNagiosXI

Thanks for following up, what do you get for results on the command line and the option to add -v or --verbose to see more information.

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/usr/local/nagios/libexec/check_ncpa.py -H yourwindowsserver2019 -t welcome -M 'plugins/check_tcp' -q 'args= -H hosttocheckhere -p 5693' --verbose

Or if the plugin is in your '/nagios/libexec/.' on your server:

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/usr/local/nagios/libexec/check_ncpa.py -H yourwindowsserver2019 -t welcome -M 'check_tcp' -q 'args= -H hosttocheckhere -p 5693' --verbose

Let us know the results,
Perry

[DerekNagiosXI]

Tried off the server, got
An error occurred:
UNKNOWN: An error occured connecting to API. (HTTP error: '500 INTERNAL SERVER ERROR')

[pbroste]

Hello @DerekNagiosXI

Typical reasons to see 500 errors include; permissions, coding, and perhaps redirect issues.

To further dig let's verify:

Date and time are the same across.

Update the 'nagios' User Account:

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chage -I -1 -m 0 -M 99999 -E -1 nagios

Verify the user and the 'check_ncpa.py' command:

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whoami

Results:

root

List permissions:

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ls -l /usr/local/nagios/libexec/check_ncpa.py

Results:

-rwxr-xr-x. 1 apache nagios size mon day hh:mm /usr/local/nagios/libexec/check_ncpa.py

Switch to nagios User Account:

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su -l nagios

Run with 'nagios' User Account:

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/usr/local/nagios/libexec/check_ncpa.py -H yourhostyouarecheckinghere -V

Results:

check_ncpa.py, Version 1.2.4

We verified the 'check_ncpa.py'; now lets check via the Windows command that 'plugins/check_tcp' <yourargshere> passes. Also, test by adding 'Everyone' with full control.

Once verified that the 'check_ncpa.py' and the 'check_tcp' each pass when execute separately. Then integrate the commands and run:

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/usr/local/nagios/libexec/check_ncpa.py -H yourwindowsserver2019 -t welcome -M 'plugins/check_tcp' -q 'args= -H hosttocheckhere -p 5693' --verbose

Thanks,
Perry