MiniLab

1.0.0

Public/Add-WinRMTrustedHost.ps1

                                <#

    .SYNOPSIS

        This function adds an IP or hostname/fqdn to "WSMan:\localhost\Client\TrustedHosts". It also ensures

        that the WSMan Client is configured to allow for remoting.

    .DESCRIPTION

        See .SYNOPSIS

    .NOTES

    .PARAMETER NewRemoteHost

        This parameter is MANDATORY.

        This parameter takes a string that represents the IP Address, HostName, or FQDN of the Remote Host

        that you would like to PSRemote to.

    .EXAMPLE

        # Open an elevated PowerShell Session, import the module, and -

        PS C:\Users\zeroadmin> Add-WinRMTrustedHost -NewRemoteHost 192.168.2.49

#>

function Add-WinRMTrustedHost {

    [CmdletBinding()]

    Param (

        [Parameter(Mandatory=$True)]

        [string]$NewRemoteHost

    )

    # Make sure WinRM in Enabled and Running on $env:ComputerName

    try {

        $null = Enable-PSRemoting -Force -ErrorAction Stop

    }

    catch {

        $NICsWPublicProfile = @(Get-NetConnectionProfile | Where-Object {$_.NetworkCategory -eq 0})

        if ($NICsWPublicProfile.Count -gt 0) {

            foreach ($Nic in $NICsWPublicProfile) {

                Set-NetConnectionProfile -InterfaceIndex $Nic.InterfaceIndex -NetworkCategory 'Private'

            }

        }

        try {

            $null = Enable-PSRemoting -Force

        }

        catch {

            Write-Error $_

            Write-Error "Problem with Enabble-PSRemoting WinRM Quick Config! Halting!"

            $global:FunctionResult = "1"

            return

        }

    }

    # If $env:ComputerName is not part of a Domain, we need to add this registry entry to make sure WinRM works as expected

    if (!$(Get-CimInstance Win32_Computersystem).PartOfDomain) {

        $null = reg add HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v LocalAccountTokenFilterPolicy /t REG_DWORD /d 1 /f

    }

    # Add the New Server's IP Addresses to $env:ComputerName's TrustedHosts

    $CurrentTrustedHosts = $(Get-Item WSMan:\localhost\Client\TrustedHosts).Value

    [System.Collections.ArrayList][array]$CurrentTrustedHostsAsArray = $CurrentTrustedHosts -split ','

    $HostsToAddToWSMANTrustedHosts = @($NewRemoteHost)

    foreach ($HostItem in $HostsToAddToWSMANTrustedHosts) {

        if ($CurrentTrustedHostsAsArray -notcontains $HostItem) {

            $null = $CurrentTrustedHostsAsArray.Add($HostItem)

        }

        else {

            Write-Warning "Current WinRM Trusted Hosts Config already includes $HostItem"

            return

        }

    }

    $UpdatedTrustedHostsString = $($CurrentTrustedHostsAsArray | Where-Object {![string]::IsNullOrWhiteSpace($_)}) -join ','

    Set-Item WSMan:\localhost\Client\TrustedHosts $UpdatedTrustedHostsString -Force

}

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