<#
 #   It is recommended to test the script on a local machine for its purpose and effects. 
 #   ManageEngine Endpoint Central will not be responsible for any 
 #   damage/loss to the data/setup based on the behavior of the script.

 #   Description : To fetch the firewall results in a common share path

 #   Configuration Type - COMPUTER
 
 #   Limitation: The common shared path must be accessible by everyone.

 #   Arguments: The common shared path must be hardcoded inside the script.
 #>

# Get the hostname of the local server
$hostname = $env:COMPUTERNAME

# Define the shared folder path and the folder name
$sharedFolderPath = "\\CommonSharePathName"  # Replace this with your shared network path

$folderName = "EndpointCentral"
$folderPath = Join-Path -Path $sharedFolderPath -ChildPath $folderName
$csvPath = Join-Path -Path $folderPath -ChildPath "$hostname.csv"

# Initialize an array to store the results
$results = @()

# Error handling block to catch any issues during firewall rule collection
try {
    # Retrieve the list of firewall rules where the action is "Block"
    $firewallRules = Get-NetFirewallRule | Where-Object { $_.Action -eq "Block" }

    # Loop through each firewall rule and collect additional details
    foreach ($rule in $firewallRules) {
        # Get associated address filter details for the current rule
        $ruleDetails = Get-NetFirewallAddressFilter -AssociatedNetFirewallRule $rule
        
        # Store the relevant details in the results array
        $results += [PsCustomObject]@{
            Hostname       = $hostname
            RuleName       = $rule.Name
            DisplayName    = $rule.DisplayName
            Description    = $rule.Description
            Direction      = $rule.Direction
            Enabled        = $rule.Enabled
            RemoteAddress  = $ruleDetails.RemoteAddress
            LocalPort      = $ruleDetails.LocalPort
            RemotePort     = $ruleDetails.RemotePort
        }
    }
} catch {
    # Handle errors and display a message
    Write-Error "An error occurred while collecting firewall rules or processing the data: $_"
}

# Error handling block for creating the folder and exporting the CSV
try {
    # Check if the folder exists, if not, create it
    if (-not (Test-Path $folderPath)) {
        New-Item -Path $folderPath -ItemType Directory
        Write-Host "Folder '$folderPath' created successfully."
    }

    # Check if the CSV file already exists
    if (Test-Path $csvPath) {
        # Append the results to the existing CSV file
        $results | Export-Csv -Path $csvPath -Append -NoTypeInformation
    } else {
        # Create a new CSV file and export the results
        $results | Export-Csv -Path $csvPath -NoTypeInformation
    }
} catch {
    # Handle errors and display a message
    Write-Error "An error occurred while creating the folder or exporting data to the CSV file: $_"
}