Nagios Support Forum

tgriep wrote:You will need to edit the resource.cfg file and change the $USER3$ option to the community string you have setup on the remote system. Save the file and restart nagios and that should fix the issue for you.

I modified the sting in resource.cfg from $USER3$=someuser to $USER3$=my-own-SNMP-community but nothing has changed.
Then I decided to check the standard services (check_disk - Root Partition, check_load - Current Load), but I got a strange result:

Please run this command from the command line and post the full output:
Also, please use imgur for your image hosting as it locked up my browser.

Thank you

There are a lot errors above, like on the screenshot.

But I donwload snmp by command:
apt-get install snmp-mibs-downloader
and when I run command again I get:

You need to change COMMUNITY to your SNMP community and change HOST to the host that you are trying to monitor.

Please zip up and attach your entire /usr/share/mibs directory so that I can review it, we need to fix those errors.

"You need to change COMMUNITY to your SNMP community and change HOST to the host that you are trying to monitor."
Сan you tell more detail?

Run the command below from the Nagios server but replace COMMUNITY with the SNMP community string you have setup on the remote server.
Also, replace xxx.xxx.xxx.xxx with the IP address of the remote server. Post the output.

resource.cfg in my Nagios server.

resource.cfg in my remote server

result of command when I run it in Nagios server

What the plugin does is to connect to the remote server using SNMP to retrieve the information and that isn't happening.
Lets try a simpler snmpwalk command and see if we get any response from the remote server.
Run this from the Nagios server and post the output here.

That what I got.

It could be a wrong community string, or snmp is not running on the remote device