param(
    [string]$hostname = "example.com",
    [int]$port = 443
)

function Test-Port {
    param (
        [string]$HostName,
        [int]$Port,
        [int]$Timeout = 5000
    )

    try {
        $tcpConnection = New-Object System.Net.Sockets.TcpClient
        $asyncResult = $tcpConnection.BeginConnect($HostName, $Port, $null, $null)
        $success = $asyncResult.AsyncWaitHandle.WaitOne($Timeout, $false)
        
        if ($success -and $tcpConnection.Connected) {
            $tcpConnection.Close()
            Write-Host "Successfully connected to $HostName on port $Port."
            return $true
        }
        else {
            Write-Host "Port $Port on $HostName is closed or unreachable."
            return $false
        }
    }
    catch {
        $errorMessage = $_.Exception.Message
        Write-Host ("Error connecting to $HostName on port ${Port}: " + $errorMessage)
        return $false
    }
}

# Test the hostname and port
Test-Port -HostName $hostname -Port $port