Before deploying Snow Windows agents via the console, the target Windows device must allow remote communication over specific ports and have required services enabled. The following PowerShell script checks:

• Whether the required UDP and TCP ports are open (135, 137, 138, 139, 445).

• Whether File and Printer Sharing is enabled.

• Whether the Remote Procedure Call (RPC) service is running.

Run this script in an elevated PowerShell session to confirm prerequisites are met before attempting deployment.

<#
        Description    : Test prerequisites required to deploy agents via console.
        .NOTES
        Version:        1.0
        Author:         Julian Dalley
        Creation Date:  2024 04 23
        Purpose/Change: Check that the prerequisites for deploying snow Windows agents via the console are met.
        Reference   : https://docs.snowsoftware.com/snow-inventory-server/en/UUID-eecf54a4-28dc-3957-c0a5-56309d578da0.html

        >>>RUN IN POWERSHELL ISE WITH ADMINISTRATOR PRIVILEDGES<<<
#>

# Function to check if a UDP port is open
function Test-UDPPort {
    param (
        [string]$computerName,
        [int]$port
    )
    
    $udpClient = New-Object System.Net.Sockets.UdpClient
    try {
        $udpClient.Connect($computerName, $port)
        return $true
    }
    catch {
        return $false
    }
    finally {
        $udpClient.Close()
    }
}

# Function to check if a TCP port is open
function Test-TCPPort {
    param (
        [string]$computerName,
        [int]$port
    )
    
    $tcpClient = New-Object System.Net.Sockets.TcpClient
    try {
        $tcpClient.Connect($computerName, $port)
        return $true
    }
    catch {
        return $false
    }
    finally {
        $tcpClient.Close()
    }
}

# Check UDP ports 137 and 138
$udpPorts = @(
    @{Port=137;Description="UDP 137"},
    @{Port=138;Description="UDP 138"}
)

foreach ($udpPort in $udpPorts) {
    $isOpen = Test-UDPPort -computerName "localhost" -port $udpPort.Port
    if ($isOpen) {
        Write-Host -ForegroundColor Green "$($udpPort.Description) is open."
    }
    else {
        Write-Host -ForegroundColor Red "$($udpPort.Description) is closed."
    }
}

# Check TCP ports 139, 445, and 135 (RPC)
$tcpPorts = @(
    @{Port=139;Description="TCP 139"},
    @{Port=445;Description="TCP 445"},
    @{Port=135;Description="TCP 135 (RPC)"}
)

foreach ($tcpPort in $tcpPorts) {
    $isOpen = Test-TCPPort -computerName "localhost" -port $tcpPort.Port
    if ($isOpen) {
        Write-Host -ForegroundColor Green "$($tcpPort.Description) is open."
    }
    else {
        Write-Host -ForegroundColor Red "$($tcpPort.Description) is closed."
    }
}

# Check if file and printer sharing is enabled
$filePrinterSharing = Get-WmiObject -Class Win32_Share -Filter "Type = 0"
if ($filePrinterSharing) {
    Write-Host -ForegroundColor Green "File and printer sharing is enabled."
}
else {
    Write-Host -ForegroundColor Red "File and printer sharing is disabled."
}

# Check if RPC service is running
$rpcService = Get-Service -Name "RpcSs"
if ($rpcService.Status -eq "Running") {
    Write-Host -ForegroundColor Green "RPC service is running."
}
else {
    Write-Host -ForegroundColor Red "RPC service is not running."
}