When Trying to invoke-Command against the Local Host I get access denied.
I have confirmed that PS remoting is enabled and the account is Administrator. Additionally Remoting in from remote machine works without issue.
Invoke-Command -computername LocalHost -scriptblock {hostname}
I expect to have the hostname of the local machine returned, however I receive Access denied Errors.
Enable PSRemoting Service to Start Automatic
on both host and remote machines
Set-Service winrm -StartupType Automatic
Start-Service winrm
Enable PSREmoting
On both host and remote machines
EnablePSRemoting -Force
Add computers to Trusted Hosts
On Remote machine
Set-Item wsman:\localhost\Client\TrustedHosts -Value "$(hostname),*$((Get-WmiObject Win32_ComputerSystem).Domain)"
Enable Multi Hopping in Powershell Remoting
Identify which hosts to allow passing of Creds
Enable-WSManCredSSP –Role Client –DelegateComputer "$(hostname),*$((Get-WmiObject Win32_ComputerSystem).Domain)"
On the source machine.
Enable-WSManCredSSP –Role Server
You must specify Authentication and a Credential
on Host Machine
$Cred = [System.Management.Automation.PSCredential]::new("<username>",$("<Password>" | ConvertTo-SecureString -AsPlainText -Force))
invoke-command -ComputerName localhost -ScriptBlock {Write-Host $args[0]} -ArgumentList "Hello!, It Works" -Authentication Credssp -Credential $cred
REFERENCE
https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_remote_troubleshooting?view=powershell-6
Related
When running the below code, i can put anything in the block at the bottom - I'm trying to copy a folder across to run an exe from a local folder and perform an install of that exe during the remote session to remote machines. I am getting Access Denied Errors. I read, i cant use the Kerberos Delegation Cmdlets which are only for a forest level of 2012 and above. Current Site has Domain Functional Level 2008 R2. Is there another way to achieve copying the files across during each remote session to the computers specified in the text file?
Thanks in advance
########################################
$Cred = Get-Credential DOMAIN\USER
$Computers = Get-Content C:\tab.txt | Where-Object { $_ }
ForEach ($Computer in $Computers)
# {
# if (Test-Connection -ComputerName $Computer -BufferSize 16 -Count 1 `
-Quiet)
{
# Creates a new remote PowerShell Session and script block - enter
the code you want to execute remotely from this block
$Session = New-PSSession $computer -Credential $cred
Invoke-Command -Session $Session -ScriptBlock {
Copy-Item -Path "\\print-server\pcclient\win\*" -Destination
"c:\pcclient" -Force -Recurse -Verbose
# Start-Sleep -s 10
# Start-Process "\\Print-Server\PCClient\win\client-local-install.exe" -ArgumentList "/SILENT"
}
}
Remove-PSSession -Session $Session
# }
This is because you're on a remote machine, trying to access another network resource. When you connect to the remote machine in PowerShell, you're effectively connected/authenticated to that machine only, (unless you specify otherwise) it doesn't have access to your credentials to access the network share, so the connection to the network share is treated as unauthenticated, hence the failure.
This article https://blogs.technet.microsoft.com/heyscriptingguy/2012/11/14/enable-powershell-second-hop-functionality-with-credssp/ covers it well, essentially in you will need to run this locally (to allow your machine to pass credentials):
Enable-WSManCredSSP -Role Client -DelegateComputer * -Force
On the server run (to allow the server to accept these credentials):
Enable-WSManCredSSP -Role Server –Force
And update your New-PSSession command to:
$Session = New-PSSession $computer -Credential $cred -Authentication CredSSP
If you want, you can share your credentials with only specific machines, or subsets of a domain using *.yourdomain.lan or whatever, if you connect to multiple machines, then it's easier to use -DelegateComputer *.
I need to execute powershell script on remote computer with admin privilegies.
I have 2 scripts: client and server.
When i start client.ps1 i invoke command on server machine but get access error. I get no error if I use simple code in server.ps1 like write-host "hello".
server.ps1:
Get-service -ComputerName 'client'
client.ps1:
$ScriptBlockContent = {
d:\server.ps1
}
$remote=New-PSSession -ComputerName 'server'
Invoke-Command $remote -ScriptBlock $ScriptBlockContent
Your problem is authentication. You have to enable the server to use your credentials for that. You can do this by using CredSSP.
Enable this on your client:
Enable-WSManCredSSP -Role Client -DelegateComputer ServerNameHere
Enable it on your server:
Enable-WSManCredSSP -Role Server
Now add this to your Invoke-Command:
-Credential Domain\YourUsername -Authentication CredSSP
A remark on that: With CredSSP, its easy to steal your credentials, if you connect to a compromised system (same as RDP). Be sure that you do this on secure computers only.
Your client is trying to open D:\server.ps1 and getting access denied. Your script block doesn't even contain the neccesary code to cause powershell to process the contents of the server.ps1 anyway. You have it way to complicated.
You need to properly define a script block:
$scriptblock = { Get-service -ComputerName 'client' }
$remote=New-PSSession -ComputerName 'server'
Invoke-Command $remote -ScriptBlock $scriptblock
Running this command will connect to the machine called 'Server' and tell it to run Get-Service on 'Client' You don't need a client.ps1 and server.ps1 It can all be done from 1 script.
You also need to ensure winrm is running and configured on the server.
I uploaded some files to a remote host with PowerShell, by FTP. On this host runs Windows 7 Embedded.
It turns out there is EWF (Enhanced Write Filter). So after a restart the uploaded files were gone. For saving the changes it needs commit them in cmd (at the remote host) by: ewfmgr d:-commit How can I include this command in my PowerShell code?
The code:
Enable-PSRemoting -Force
Set-Item wsman:\localhost\client\trustedhosts -Value * -Force
Restart-Service WinRm
Test-WSMan $line
Invoke-Command -ComputerName $line -scriptblock {cmd.exe /c "ewfmgr d: -commit"} -credential $FTPCredential
When I run Enable-PSRemoting -Force manually on the remote computer, it works, but it is uncomfortable and take lots of time. Is there another way to do this once for many hosts simultaneously?
Example-Code:
$session = New-PSSession -ComputerName yourRemoteComputer
Invoke-Command -Session $session -Scriptblock {ewfmgr d: -commit}
Remove-PSSession -Session $session
You have to enable Powershell Remoting on your host to invoke a command like this (https://technet.microsoft.com/en-us/library/ff700227.aspx)
If you need to transmit Credentials to your remote host, you can add the -Credential-Parameter to New-PSSession. This article describes how to add valid Credentials to your script (https://technet.microsoft.com/en-us/library/ff700227.aspx)
Greetings, Ronny
I'm using the following command to reset a remote machine'
s password.
$user="Domain\domainadmin";
$pass="dapassword" | ConvertTo-SecureString -AsPlainText -Force;
$creds=New-Object System.Management.Automation.PSCredential -ArgumentList $UserName, $pass;
Invoke-Command -Credential $creds -ComputerName "DomainControllerMachine" -ScriptBlock{
$ComputerName = #"
SomeRemoteHost
"#
Import-Module ActiveDirectory;
Reset-ComputerMachinePassword -Server ${ComputerName};
}
I keep getting 'Access is denied' error.
This command cannot be executed on target computer('DomainControllerMachine') due to following error: Access is
denied.
+ CategoryInfo : InvalidOperation: (DomainControllerMachine:String) [Reset-ComputerMachinePasswor
d], InvalidOperationException
+ FullyQualifiedErrorId : InvalidOperationException,Microsoft.PowerShell.Commands.ResetCompute
rMachinePasswordCommand
The account I use has all levels of access to the ActiveDirectory. So there won't be a issue with the credentials used for authentication.
If I run the same command on the 'DomainControllerMachine' (logged in as same user) it works fine.
Import-Module ActiveDirectory;
Reset-ComputerMachinePassword -Server "SomeRemoteHost";
Even the whole invoke-command block above just works without complaining on the DomainControllerMachine.
But when I do it remotely through Invoke-Command, or Enter-PSSession I get that dreaded access denied error..
I've also tried using CredSSP after setting up the WSManCredSSP (Client, delegation and Server) on the machines with no luck.
I may have missed something, or is there a better way to handle such a case?
It looks to me like you are running the Reset-computermachinepassword command on the domaincontroller. As far as I know it should be run on the computer that needs to be reset with the DC name in the -server field.
To do this you would need to run the command on the computer that needs it's credentials reset:
Reset-Computermachinepassword -server "DomainControllerMachine" -credential $PScredential
You can try to do it remotely with a PSsession if the computer has powershell remoting enabled. You will need to specify a different authentication method to reach a computer that has lost it's trust with the domain.
You can use Credssp but this will only work if your GPO allows delegating your credentials to the target computer.
Or you can use Basic authentication. But for that to work the Target must accept unencrypted traffic.
The command to do it remotely would probably look something like this:
$session = new-PSSession "targetcomputer" -Authentication Basic -Credential "Domain\domainadmin"
Invoke-Command -Session $session -scriptblock {Reset-Computermachinepassword -server "Domain\domainadmin"}
I am not able to connect to remote machine using powershell. The procedures i did is:
Enable-PSRemoting -Force
Set-Item WSMan:\localhost\Client\TrustedHosts *
restart-Service winrm
Enter-PSSession IpAddress
When i run the last step (4th one) from my server machine i am getting an error like:
Enter-PSSession : Connecting to
remote server failed with the
following error message : Access is
denied.
I have tried all the above 4 steps in both client and server machine. Please help
Thanks
Prav
Check the port on the remote machine
PS Z:> cd WSMan:\localhost\Listener PS WSMan:\localhost\Listener> dir [cut] PS WSMan:\localhost\Listener> cd .\Listener_1084132640 PS WSMan:\localhost\Listener\Listener_1084132640> dir WSManConfig: Microsoft.WSMan.Management\WSMan::localhost\Listener\Listener_1084132640 Name Value ---- ----- Address * Transport HTTP Port 5985
Then connect with the correct port
$remotePowerShellPort = 5985
$ConnectionURI = ("http://{0}:{1}" -f $targetServer, $remotePowerShellPort)
$remoteSession = New-PSSession -ConnectionURI $ConnectionURI
Invoke-Command -Session $remoteSession -ScriptBlock { dir }
Remove-PSSession $remoteSession