Opsview - Force check_wmi_plus.pl to use NTLMv2

By default, the check_wmi_plus.pl plugin uses NTLMv1. If you need to use NTLMv2, follow the steps in this article.

The method varies slightly depending on whether you want to use NTLMv2 for all hosts or just some specific hosts.

All hosts

Change the default arguments of the check_wmi_plus.pl service checks so that they always use NTLMv2.

Prerequisites

• None

Process

1. Log in to the web UI as an administrator and navigate to Configuration > Service Checks.
2. Identify the service checks you want to use NTLMv2.
3. Click the contextual menu of the service check and click Edit to open the service check configuration window.
4. Switch to the Plugin and Arguments tab.
5. Append the below to the arguments in the Arguments field:

 --extrawmicarg "--option=client ntlmv2 auth=Yes"

6. Click Submit Changes.
7. Repeat the above steps for each service check you want to change to use NTLMv2.
8. Apply Changes.

Specific hosts

Add exceptions to the check_wmi_plus.pl service checks on specific hosts so they always use NTLMv2.

Prerequisites

• None

Process

1. Log in to the web UI as an administrator and navigate to Configuration > Hosts.
2. Identify the hosts you want to use NTLMv2.
3. Click the contextual menu of the host and click Edit to open the host configuration window.
4. Switch to the Service Checks tab.
5. Expand the service check groups to find the check_wmi_plus.pl checks running on the host, e.g. OS > Windows > WMI > Base Agentless.
6. Click the tick box to select a service check.
7. Click to expand Exceptions on the right of the window.
8. Click the exceptions tick box to enable exceptions for this service check on this host.
9. Append the below to the arguments in the arguments field:

 --extrawmicarg "--option=client ntlmv2 auth=Yes"

10. Repeat steps 5–9 for each service check on this host that you want to change to use NTLMv2.
11. Click Submit Changes.
12. Repeat steps 2–11 for each host you want to change so its service checks use NTLMv2.
13. Apply Changes.