Windows

Most of the stuff here is Python3 related.

Table of contents

1. Setup OpenSSH Server
   1. Public Key Authentication
2. Permissions for Powershell scripts

Setup OpenSSH Server

Public Key Authentication

I got these instructions from: https://www.concurrency.com/blog/may-2019/key-based-authentication-for-openssh-on-windows

1. Create the file C:\ProgramData\ssh\administrators_authorized_keys
2. Add your public key inside of it
3. Run the following Powershell script to fix the permissions to the file:

$acl = Get-Acl C:\ProgramData\ssh\administrators_authorized_keys
$acl.SetAccessRuleProtection($true, $false)
$administratorsRule = New-Object system.security.accesscontrol.filesystemaccessrule("Administrators","FullControl","Allow")
$systemRule = New-Object system.security.accesscontrol.filesystemaccessrule("SYSTEM","FullControl","Allow")
$acl.SetAccessRule($administratorsRule)
$acl.SetAccessRule($systemRule)
$acl | Set-Acl

Permissions for Powershell scripts

If you try to run a Powershell script and get an error like the following:

.\fix-permissions.ps1 : File C:\ProgramData\ssh\fix-permissions.ps1 cannot be loaded because running scripts is disabled on this system. For more information, see about_Execution_Policies at https:/go.microsoft.com/fwlink/?LinkID=135170

The solution is to fix the permissions for the current user.

Open a Powershell session and type:

PS C:\ProgramData\ssh> Get-ExecutionPolicy -List

        Scope ExecutionPolicy
        ----- ---------------
MachinePolicy       Undefined
   UserPolicy       Undefined
      Process       Undefined
  CurrentUser       Undefined
 LocalMachine       Undefined


PS C:\ProgramData\ssh> Get-ExecutionPolicy -Scope CurrentUser Undefined

As seen above, the ExecutionPolicy for the CurrentUser is set to undefined and so that user cannot execute powershell scripts. To fix it, do the following:

PS C:\ProgramData\ssh> Set-ExecutionPolicy -Scope CurrentUser -ExecutionPolicy Unrestricted

Table of contents

• Powershell