16.3 Apache 403 Warning Error Reported in Nagios on a New Installation or Upgrade to OES 2018 or Later

You might see an Apache 403 Forbidden Warning error reported in Nagios after a new installation or upgrade to OES 2018 or later.

Figure 16-1 HTTP 403 Forbidden Warning Error

To resolve the issue, you can try the following:

  1. Log in to the server as the root user, open a terminal console, then navigate to the /etc/nagios/objects directory.

  2. In the localhost.cfg file, modify the check_command parameters in the section, “# Define a service to check HTTP on the local machine”:At the command prompt, enter

    define service {
                  use        local-service    ; Name of service template to use
                  host_name              localhost
                  service_description    HTTP
                   check_command         check_http! -e 'HTTP/1.0 200','HTTP/1.1 200','HTTP/1.1 403 Forbidden'

                   notifications_enabled 0
               }

  3. Restart Nagios.

    rcnagios restart

  4. After a few minutes, verify that the HTTP status for Nagios has been updated to the OK (green) state.

    1. Log in as the root user to OES Remote Manager.

    2. Select Diagnose > Server Health Services, then click Nagios Service Detail.

    3. In the Nagios Authentication Required dialog box, specify your Nagios user credentials, then click OK.

    4. View the HTTP status in the Nagios main dashboard.