Powershell TCP Port Test Function

function Test-TcpPortConnection {
    param($hostname,$port)
    try {
        $tcp = New-Object System.Net.Sockets.TcpClient($hostname,$port)
        $tcp.Close()
        return $true;
    }
    catch {
        return $false;
    }
}

// Returns True unless your network is messed up
Test-TcpPortConnection "www.google.com" 80
// Returns False unless your dns resolves this
Test-TcpPortConnection "www.thisisnotarealhost.com" 80