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In this article I want to talk about Applocker rule priority and rule sorting. As you know, Applocker has one security level or default action — Disallowed all except explicity allowed. This is common misunderstanding point for some administrators.

When you create Path or Publisher rule, it cannot uniquely identify particular file. For example, when you create Path rule such C:\BusinessPrograms\*, it will allow to run anything within C:\BusinessPrograms folder and all subfolders. Or, for example, you create Publisher rule that will allow to run any file that is signed with ‘Microsoft Corporation’ digital certificate, regardless of actual file location. It is common scenario when you want continue to block some files that are located in this folder or subfolders (in Path rule case) or files that are signed with particular certificate subject (in our case this is ‘Microsoft Corporation’ certificate), however.


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This article describes process of obtaqining and installing a digital certificate for OpsMgr agent that is not a member of your AD forest or a trusted forest. This article assumes that your managed computer is running one of the following operating systems:

  • Windows 2000
  • Windows XP
  • Windows Vista
  • Windows 7
  • Windows 8/8.1
  • Windows 10
  • Windows 2000 Server
  • Windows Server 2003 (including R2)
  • Windows Server 2008 (including R2 and Server Core)
  • Windows Server 2012 (including R2 and Server Core)

 Target audience is OpsMgr administrators that have limited or no understanding of what certificates are and how PKI works. Described below is not the only way to achieve the same or similar goal but it implements many of PKI Best Practices.

In this article


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