Execute powershell script remotely on Amazon EC2 instance from my local computer - powershell

Question

I have an Amazon EC2 instance.
Using powershell on my local workstation, I want to be able to remote into my Amazon EC2 instance and execute some commands.
I have found many articles online but none are working or I misunderstood them (probably the latter).
Some I tried are
Managing Windows EC2 Instances remotely with Powershell
Administering EC2 instance with Windows Powershell
Enabling- PSRemoting
How to Run PowerShell Commands on Remote Computers
My understanding is that I need to:
Amazon EC2 Dashboard > Network & Security > Security Groups > Add port 5985
//Local & EC2 PowerShell(Administrator)
enable-psremoting -force
//Local PowerShell(Administrator)
set-item wsman:\localhost\Client\TrustedHosts -value "*" -force
$password = convertto-securestring -asplaintext -force -string myPassword
$credential = new-object -typename system.management.automation.pscredential -argumentlist "myUsername", $password
$session = new-pssession ec2-00-00-00-000.compute-1.amazonaws.com -credential $credential
enter-pssession $session
But I get this error
new-pssession : [ec2-00-00-00-000.compute-1.amazonaws.com] Connecting to remote server
ec2-00-00-00-000.compute-1.amazonaws.com failed with the following error message : WinRM cannot complete the
operation. Verify that the specified computer name is valid, that the computer is accessible over the network, and
that a firewall exception for the WinRM service is enabled and allows access from this computer. By default, the WinRM
firewall exception for public profiles limits access to remote computers within the same local subnet. For more
information, see the about_Remote_Troubleshooting Help topic.
At line:1 char:12
+ $session = new-pssession ec2-00-00-00-000.compute-1.amazonaws.com -credential $c ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : OpenError: (System.Manageme....RemoteRunspace:RemoteRunspace) [New-PSSession], PSRemotin
gTransportException
+ FullyQualifiedErrorId : WinRMOperationTimeout,PSSessionOpenFailed

Answer 1

Solution found here.
The missing link was to (on the EC2 instance) open Windows Firewall with Advanced Security and edit an inbound rule.
Full Steps:
EC2 Instance
1) Open PowerShell as administrator
2) Enter enable-psremoting -force
3) Open Windows Firewall with Advanced Security
4) Inbound Rules -> Find Windows Remote Management (Http-In) - there are 2, do this for both
5) Right click -> Properties -> Advanced -> Check public
Local
6) Open PowerShell as administrator
7) Enter enable-psremoting -force
8) Enter the following:
$password = convertto-securestring -asplaintext -force -string MY_PASSWORD
$credential = new-object -typename system.management.automation.pscredential -argumentlist "MY_USERNAME", $password
$session = new-pssession MY_EC2_PUBLIC_IP -credential $credential
enter-pssession $session
Write-Host "Hello, World (from $env:COMPUTERNAME)"

Answer 2

I think that not exposing PowerShell via SSH was one of the biggest design mistakes MS did. Even years later they are too proud / blind to do revert that poor decision.
I suggest you to not fight with WinRM and instead, use an SSH server on your Windows machine.
You'll benefit from having a simple, standard, secure way to connect to your server from any device (I'm doing remote PS sessions from my iPad).
There is the opensource cygwin and my favorite proprietary (with free offering) PowershellServer
You'll thank me when your Windows server will play nicely with the rest of the world.

Answer 3

UPDATE
I got back to this old thread and would like to add another option - using the new(ish) AWS Systems Manager run-command capability.
This allows you to have no administrative port exposed to the external world so no need to fiddle with host / cloud firewalls.
It also provide other benefits like auditing, permissions etc...