Example for parsing the output from netstat

parse-netstat.ps1

function parseNetstat {
    param([object[]]$Lines)

    if ($IsWindows) {
        $skip = 4
    } else {
        $skip = 3
    }

    $Lines | Select-Object -Skip $skip | ForEach-Object {
        $columns = ($_ -split ' ').Trim() | Where-Object {$_ }
        if ($columns[1].IndexOf('[') -lt 0) {
            $laddr = $columns[1].Split(':')[0]
            $lport = $columns[1].Split(':')[1]
        } else {
            $laddr = $columns[1].Split(']:')[0].Trim('[')
            $lport = $columns[1].Split(']:')[1]
        }
        if ($columns[2].IndexOf('[') -lt 0) {
            $raddr = $columns[2].Split(':')[0]
            $rport = $columns[2].Split(':')[1]
        } else {
            $raddr = $columns[2].Split(']:')[0].Trim('[')
            $rport = $columns[2].Split(']:')[1]
        }
        [pscustomobject]@{
            Protocol = $columns[0]
            LocalAddress = $laddr
            LocalPort = $lport
            RemoteAddress = $raddr
            RemotePort = $rport
            State = $columns[3]
        }
    }
}

parseNetstat -Lines (netstat)