PowerShell: Check TCP Connections of Server by Port Numbers

# Check-TCP-Connections.ps1
# This function will output progress onto the console as well as returning a Array Object to be consumed by a program

# Set Variables of server and ports to check
$server="SOMEsherver";    
$ports=@(445,139);

function checkTcpConnections {
    Param (
            [string]$Server = "localhost",
            [int[]]$Ports = @(445,139) #default SMB ports
    )
    $session=New-PSSession -ComputerName $server
    $results=invoke-command -Session $session -ScriptBlock{
        param($ports)

        write-host "Collecting raw connection data..."
        $connections=[System.Net.NetworkInformation.IPGlobalProperties]::GetIPGlobalProperties().GetActiveTcpConnections()|?{$_.State -eq "Established"}
   
        write-host "Refining raw results for matches connections to local port(s) of $ports..."
        $connectionsRefined=@()
        for ($i=0;$i -lt $connections.count;$i++){
            $thisConnection=$connections[$i]
            $index=$i
            $localIp=$([void]($thisConnection.LocalEndpoint -match "(.*):");$matches[1];)
            $localPort = $thisconnection.LocalEndPoint.tostring().substring($localip.Length+1)
            if ($ports -contains [int]$localPort){
                $remoteIp=$([void]($thisConnection.RemoteEndpoint -match "(.*):");$matches[1];)
                $remotePort=$thisconnection.RemoteEndpoint.tostring().substring($remoteIp.Length+1)
                $remoteComputerName=try{[System.Net.dns]::gethostentry([string]$remoteIp).Hostname}catch{}
                if ($remoteComputerName){write-host "$remoteIp`: $remoteComputerName"}
                $State=$thisConnection.State;
                $connectionsRefined+=[PSCustomObject]@{index=$index;localIp=$localIp;localPort=$localPort;remoteComputerName=$remoteComputerName;remoteIp=$remoteIp;remotePort=$remotePort;State=$State};
                }else{
                    continue;
                    }
            }
       return $connectionsRefined
       } -args $ports

       Remove-PSSession $session
       write-host "`r`n------------------Here are the results:`r`n--------------------"
       return $results;
}

checkTcpConnections -Server $server -Ports $ports

Sample Output:

<# Sample Output
index              : 252
localIp            : 5.5.5.5
localPort          : 445
remoteComputerName : yamama.kimconnect.com
remoteIp           : 256.500.400.1000
remotePort         : 59920
State              : Established
PSComputerName     : cigarettesSuck
RunspaceId         : 8d552cf5-a0bc-4473-b87c-04c54432a8f4

index              : 253
localIp            : 5.5.5.5
localPort          : 445
remoteComputerName : contra.kimconnect.com
remoteIp           : 256.500.400.4000
remotePort         : 53957
State              : Established
PSComputerName     : cigarettesSuck
RunspaceId         : 8d552cf5-a0bc-4473-b87c-04c54432a8f4

index              : 254
localIp            : 5.5.5.5
localPort          : 445
remoteComputerName : 3yamama.kimconnect.com
remoteIp           : 256.500.400.3000
remotePort         : 58733
State              : Established
PSComputerName     : cigarettesSuck
RunspaceId         : 8d552cf5-a0bc-4473-b87c-04c54432a8f4

index              : 255
localIp            : 5.5.5.5
localPort          : 445
remoteComputerName : yamama5.kimconnect.com
remoteIp           : 256.500.400.2000
remotePort         : 61791
State              : Established
PSComputerName     : cigarettesSuck
RunspaceId         : 8d552cf5-a0bc-4473-b87c-04c54432a8f4
#>