Hi kenny,
Something like (untested):

use warnings;
no warnings 'once'; # suppress warning re $client_address
use IO::Socket;

$server_port = '7777'; 

open ($rd, '>>', 'log.txt') or die "Couldn't open log.txt for appendin
+g: $!";

$server = IO::Socket::INET->new(
 LocalPort => $server_port,
 Type      => SOCK_STREAM,
 Listen    => 1 )
 or die "Couldn't be a tcp server on port $server_port : $@\n$!\n";

while(1) {
  print "Server waiting\n";
  ($client, $client_address) = $server->accept();
  $data_read = <$client>;
  print $rd $data_read;
  close($client);
}
[download]

(That's adapted from an actual script I use on Windoze ... ymmv.)

Cheers,
Rob