I need to detect but not interfere with a network port.

In short I want a script that listens on port 2000 in tandem with another application. This script will trigger a batch file when the port is active. What is happening now is when this script runs it blocks the other app. Any wisdom is welcome.

My current attempt: 
use warnings;
# use strict;
use IO::Socket;
use Socket;

my $port = shift || 2000;

my $socket = IO::Socket::INET->new(
   LocalPort    => $port,
   Type         => SOCK_STREAM,
   Reuse        => 1,
   Listen       => 10,
)
   or die "Couldn't create server: $@\n";

while (my $client = $socket->accept()) {
   my ($port, $iaddr) = unpack_sockaddr_in($client->peername());

    #### GET TIME ####
    $t = time();
    my $then = localtime($t);  
    
    #### GET IP ####
    my $ip_address = inet_ntoa($iaddr); 

    open(PLOT,">>label-log.txt") || die("This file will not open!");
        seek PLOT,0,2;
        print PLOT "$ip_address $then \n";
    close(PLOT);

    sleep(5);
    system ("start /b C:\\momlabels\\transfer.bat");

   $client->send(inet_ntoa($iaddr));
   $client->close();

}

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In reply to Networking with IO::Socket by TheVend

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