New-PSSession

Create a persistent connection to a local or remote computer.

Syntax
New-PSSession [[-ComputerName] string[]] [-ApplicationName string]
[-Authentication AuthenticationMechanism] [-ConfigurationName string]
[-CertificateThumbprint string] [-Credential PSCredential]
[-Name string[]] [-Port int] [-SessionOption PSSessionOption]
[-UseSSL] [-ThrottleLimit int] [CommonParameters]

New-PSSession [[-Session] PSSession[]] [-Name string[]]
[-ThrottleLimit int] [CommonParameters]

New-PSSession [-ConnectionURI] Uri[] [-AllowRedirection]
[-Authentication AuthenticationMechanism] [-ConfigurationName string]
[-CertificateThumbprint string] [-Credential PSCredential]
[-Name string[]] [-SessionOption PSSessionOption]
[-ThrottleLimit int] [CommonParameters]

Key
-AllowRedirection
Allow redirection of this connection to an alternate Uniform Resource Identifier (URI).

By default, PowerShell does not redirect connections.
To also limit the number of times that the connection is redirected, set the
MaximumConnectionRedirectionCount property of the $PSSessionOption preference variable, or
the MaximumConnectionRedirectionCount property of the value of the SessionOption parameter.
The default value is 5.
For more information, see the description of the SessionOption parameter, and see New-PSSessionOption.

-ApplicationName string
The application name segment of the connection URI.
Use this to specify the application name when you are not using -ConnectionURI.

The default value is the value of the $PSSessionApplicationName preference variable on
the local computer. If this preference variable is not defined, the default value is "WSMAN".
This value is appropriate for most uses. For more see about_Preference_Variables.

The WinRM service uses the application name to select a listener to service the connection
request. This name should match the URLPrefix property of a listener on the remote computer.

-Authentication AuthenticationMechanism
The mechanism used to authenticate the user's credentials:

The default value is "Default".

CredSSP authentication is available only in Windows Vista and later versions of Windows.
For more information about the values of this parameter, see docs.Microsoft.com

Caution: Credential Security Service Provider (CredSSP) authentication,
in which the user's credentials are passed to a remote computer to be
authenticated, is designed for commands that require authentication on
more than one resource, such as accessing a remote network share.
This mechanism increases the security risk of the remote operation.
If the remote computer is compromised, the credentials that are passed to
it can be used to control the network session.

-CertificateThumbprint string
The digital public key certificate (X509) of a user account that has permission
to perform this action. Enter the certificate thumbprint of the certificate.

Certificates are used in client certificate-based authentication.
They can be mapped only to local user accounts; they do not work with domain accounts.

To get a certificate thumbprint, use the Get-Item or Get-ChildItem
command in the PowerShell Cert: drive.

-ComputerName string[]
Create a persistent connection (PSSession) to the specified computer.
If you enter multiple computer names, New-PSSession creates multiple PSSessions,
one for each computer. The default is the local computer.

Type the NetBIOS name, an IP address, or a fully qualified domain name of one
or more remote computers. To specify the local computer, type the computer name,
"localhost", or a dot (.).
When the computer is in a different domain than the user, the fully qualified
domain name is required. You can also pipe a computer name (in quotes) to New-PSSession.

To use an IP address in the value of the ComputerName parameter, the command
must include the Credential parameter. Also, the computer must be configured
for HTTPS transport or the IP address of the remote computer must be included in
the WinRM TrustedHosts list on the local computer.
For instructions for adding a computer name to the TrustedHosts list,
see "How to Add a Computer to the Trusted Host List" in about_Remote_Troubleshooting.

Note: In Windows Vista and later versions of Windows, to include the local
computer in the value of the ComputerName parameter, you must start PowerShell
with the "Run as administrator" option.

-ConfigurationName string
The session configuration that is used for the new PSSession.

Enter a configuration name or the fully qualified resource Uniform Resource
Identifier (URI) for a session configuration. If you specify only the configuration
name, the following schema URI is prepended: http://schemas.microsoft.com/powershell.

The session configuration for a session is located on the remote computer.
If the specified session configuration does not exist on the remote computer,
the command fails.

The default value is the value of the $PSSessionConfigurationName preference variable
on the local computer. If this preference variable is not set, the default is
Microsoft.PowerShell. For more information, see about_Preference_Variables.

-ConnectionURI Uri[]
A Uniform Resource Identifier (URI) that defines the connection endpoint.
The URI must be fully qualified.

The format of this string is as follows:
Transport://ComputerName:Port/ApplicationName

The default value is as follows:
http://localhost:80/WSMAN
Valid values for the Transport segment of the URI are HTTP and HTTPS.
If you do not specify a ConnectionURI, you can use the UseSSL, ComputerName,
Port, and ApplicationName parameters to specify the URI values.

If the destination computer redirects the connection to a different URI,
PowerShell prevents the redirection unless you use -AllowRedirection in the command.

-Credential PSCredential
A user account that has permission to perform this action.
The default is the current user.

Type a user name, such as "User01", "Domain01\User01", or "User@Domain.com", or
enter a PSCredential object, such as one returned by Get-Credential.

When you type a user name, you will be prompted for a password.

-Name string[]
A friendly name for the PSSession.

You can use this name to refer to the PSSession when using other cmdlets,
such as Get-PSSession and Enter-PSSession.

The name is not required to be unique to the computer or the current session.

-Port int
The network port on the remote computer that is used for this command.
The default is port 80 (the HTTP port).

Before using an alternate port, you must configure the WinRM listener on
the remote computer to listen at that port.
Use the following commands to configure the listener:

1. winrm delete winrm/config/listener?Address=*+Transport=HTTP
2. winrm create winrm/config/listener?Address=*+Transport=HTTP @{Port="<port-number>";}

Do not use the Port parameter unless you must. The port setting in the
command applies to all computers and sessions in which the command runs.
An alternate port setting might prevent the command from running on all computers.

-Session PSSession[]
Use the specified PSSession as a model for the new PSSession.
This parameter creates new PSSessions with the same properties as the specified PSSessions.

Enter a variable that contains the PSSessions or a command that creates or
gets the PSSessions, such as a New-PSSession or Get-PSSession command.

The resulting PSSessions have the same computer name, application name,
connection URI, port, configuration name, throttle limit, and Secure Sockets Layer (SSL)
value as the originals, but they have a different display name, ID, and instance ID (GUID).

-SessionOption PSSessionOption
Set advanced options for the session.
Enter a SessionOption object that you create by using the New-PSSession Option cmdlet.

The default values for the options are determined by the value of
the $PSSessionOption preference variable, if it is set.
Otherwise, the session uses the system defaults.

For a description of the session options, including the default values,
see New-PSSessionOption.
For information about the $PSSessionOption preference variable, see about_Preference_Variables.

-ThrottleLimit int
The maximum number of concurrent connections that can be established
to run this command. If you omit this parameter or enter a value of 0 (zero),
the default value, 32, is used.

The throttle limit applies only to the current command, not to the session or to the computer.

-UseSSL
Use the Secure Sockets Layer (SSL) protocol to establish a connection to the
remote computer. By default, SSL is not used.

WS-Management encrypts all Windows PowerShell content transmitted over the
network. UseSSL is an additional protection that sends the data across an HTTPS
connection instead of an HTTP connection.

If you use this parameter, but SSL is not available on the port used for the command,
the command fails.

CommonParameters:
-Verbose, -Debug, -ErrorAction, -ErrorVariable, -WarningAction, -WarningVariable,
-OutBuffer -OutVariable.

Standard Aliases for New-PSSession: nsn

New-PSSession creates a PowerShell session (PSSession) on a local or remote computer. When you create a PSSession, PowerShell establishes a persistent connection to the remote computer.

Use a PSSession to run multiple commands that share data, such as a function or the value of a variable. To run commands in a PSSession, use Invoke-Command. To use the PSSession to interact directly with a remote computer, use Enter-PSSession . For more information, see help about_PSSessions.

You can run commands on a remote computer without creating a PSSession by using the -ComputerName parameter of Enter-PSSession or Invoke-Command. When you use -ComputerName , PowerShell creates a temporary connection that is used for the interactive session or for a single command and is then closed.

Examples

Create a new PSSession on the local computer and save the PSSession in the $sess variable:

PS C:> $sess = new-pssession

Create a new PSSession on Server64 and save it in the $s64 variable:

PS C:> $s64 = new-pssession -ComputerName Server64

Create a new PSSession on Server65 and server66 and save the sessions to 2 variables:

PS C:> $s65, $s66 = new-session -computername server65,server66

Create a new PSSession on Server64 and use the SSL protocol with an alternate session configuration called 'DBA1' then connect via server port 8081:

PS C:> new-pssession -computername Server64 -port 8081 -useSSL -ConfigurationName DBA1

Create a new PSSession with the same properties as an existing PSSession:

PS C:> new-pssession -session $s -credential domain01\user01

Create a PSSession calles $sess with a global scope on a computer in a different domain:

PS C:> $global:sess = new-pssession -computername server64.dom24.ss64.com -credential domain01\admin01

Create a PSSession on each of the 200 computers listed in the Servers.txt file and store the resulting PSSession in the $rs variable, this syntax can also be used with spreadsheets and databases:

PS C:> $rs = get-content c:\servers.txt | new-PSsession -throttleLimit 50

Create a PSSession and store it in the $sess variable, specify the transport protocol (http), the remote computer (Server64), the port (91), and an alternate session configuration:

PS C:> $sess = new-PSSession -URI http://Server64:91/NewSession -credential domain01\user01

Create a set of PSSessions and then run a background job in each:

PS C:> $sess = new-PSSession -computername (import-csv servers.csv) -credential domain01\admin01 -throttlelimit 16

PS C:> invoke-command -session $sess -scriptblock {get-process powershell} -AsJob

Create a new PSSession that connects to a computer specified with a URI:

PS C:> new-PSSession -ConnectionURI https://management.exchangelabs.com/Management

“We never fully grasp the import of any true statement until we have a clear notion of what the opposite untrue statement would be” ~ William James

Related PowerShell Cmdlets:

Remove-PSSession - Close PowerShell session(s).
Enter-PSSession - Start an interactive session with a remote computer.
Export-PSSession - Import commands and save them in a PowerShell module.