PowerShell utilizes execution policies to regulate how it loads configuration files and runs scripts. Implementation of these policies only happens on Windows platforms. The PowerShell execution policies are mentioned below :
AllSigned :
* The scripts can run.
* Needs that all scripts and configuration files be signed by a reliable publisher, which includes scripts that you compose on the local computer.
* Encourages you before executing scripts from publishers that are still not categorized as untrusted or trusted.
* Risks running signed, but vicious, scripts.
Bypass :
* Nothing is stopped and there are no alerts or prompts generated.
* The Bypass execution policy is created for configurations in which a PowerShell script is constructed into a larger application or for configurations in which PowerShell is the basis for a program that possesses its security model.
Default :
* Restricted for Windows clients.
* RemoteSigned for Windows servers.
RemoteSigned :
* The default execution policy for the Windows system.
* Scripts can run.
* A digital signature from an authorized publisher is required on internet downloaded scripts and configuration files. It contains email and instant messaging programs.
* It doesn't need digital signatures on scripts that are not downloaded from the internet and composed on the local computer.
* It executes internet downloaded scripts that are not signed if the scripts are unblocked, like utilizing the Unblock-File cmdlet.
* Risks executing unsigned scripts from sources except for the internet and signed scripts that could be malicious in nature.
Restricted :
* The default implementation policy for Windows client computers.
* Allows individual commands, but does not permit scripts.
* Stops operating all script files, including configuration files (.ps1xml), PowerShell profiles (.ps1), and module script files (.psm1) formatting
Undefined :
* There is no implementation policy specified in the current scope.
* The execution policy is Restricted for Windows clients and RemoteSigned for Windows Server if the implementation policy in all scopes is Undefined.
Unrestricted :
* The default execution policy for non-Windows systems and cannot be modified.
* Unsigned scripts can operate. There is a chance of running malicious scripts.
* Alerts the customer before running scripts and configuration files that do not belong from the Local intranet zone.
