Well here is a Tk example to run the server. A few caveats...this is designed for a single connection only, otherwise you will need to incorporate IO::Select. I put a button, to save a log file, you can fill in the sub your self. You may even want to put a Tk repeat sub in there, to save a log every hour or so, and clear off the text buffer. Otherwise, the text widget will just start accumulating lines and growing in size.

You can also add a repeat sub to repeatedly check the latest time stamp in the text widget, and raise an alarm if one is missing.

#!/usr/bin/perl
use strict;
use warnings;
use IO::Socket;
use Tk;

$|=1;
$SIG{PIPE} = 'IGNORE';

my $listen = IO::Socket::INET->new(
    Proto       => 'tcp',
    LocalPort   => 7070,
    Listen      => 1,
    Reuse       => 1,
) or die "Can't create listen socket : $!\n";

my $mw = MainWindow->new();

my $text = $mw->Scrolled('Text',
                  -background =>'black',
                  -foreground => 'yellow',
                 )->pack();

my $subframe = $mw->Frame()->pack();

$subframe->Button(-text => 'Clear',
         -command => sub {
                      $text->delete('1.0','end');
                   })->pack(-side=>'left');

$subframe->Button(-text => 'Save Log',
         -command => sub {   })->pack(-side=>'left');

$subframe->Button(-text => 'Exit',
         -command => sub { exit  })->pack(-side=>'right');


$mw->fileevent($listen, 'readable', sub { new_connection($listen) });

my $repeater = $mw->repeat(10000, 
          sub{ $text->insert('end',"Checking stuff";
                #do stuff here
                });


Tk::MainLoop;

sub new_connection {
    my ($listen) = @_;
    my $client = $listen->accept() or warn "Can't accept connection";
    $client->autoflush(1);
    $mw->fileevent($client, 'readable', sub { handle_connection($clien
+t) });
    #$client->print("Connected\n"); 
    $text->insert('end', "Connected\t");
    $text->see('end');
}

sub handle_connection {
    my ($client) = @_;
    my $message = <$client>;
    if (defined $message and $message !~ /^quit/) {
     $message =~ s/[\r\n]+$//;
     #$client->print("Got message [$message]\n"); #echo back if wanted
+ 
     $text->insert('end', "Got message [$message]\t");
     $text->see('end');
    }
    else {
       $text->insert('end', "Connection Closed\n");
       $text->see('end');
       $client->close();
    }
}
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