Ok, runing the script mentioned there too didnt do much... Do I need some special hardware for this to work or what? When I run:

use strict;
use warnings;
#use diagnostics;

use lib ".";


use Net::UPnP::ControlPoint;
use Net::UPnP::GW::Gateway;

my $obj = Net::UPnP::ControlPoint->new();

my $retry_cnt = 0;
my @dev_list = ();
while (@dev_list <= 0 || $retry_cnt > 5) {
    #@dev_list = $obj->search(st =>'urn:schemas-upnp-org:device:Intern
+etGatewayDevice:1', mx => 10);
    @dev_list = $obj->search(st =>'upnp:rootdevice', mx => 3);
    $retry_cnt++;
    print Dumper(@dev_list);

 }

my $devNum = 0;
foreach my $dev (@dev_list) {
    my $device_type = $dev->getdevicetype();
    if  ($device_type ne 'urn:schemas-upnp-org:device:InternetGatewayD
+evice:1') {
        next;
    }
    print "[$devNum] : " . $dev->getfriendlyname() . "\n";
    unless ($dev->getservicebyname('urn:schemas-upnp-org:service:WANIP
+Connection:1')) {
        next;
    }
    my $gwdev = Net::UPnP::GW::Gateway->new();
    $gwdev->setdevice($dev);
    print "\tExternalIPAddress = " . $gwdev->getexternalipaddress() . 
+"\n";
    print "\tPortMappingNumberOfEntries = " . $gwdev->getportmappingnu
+mberofentries() . "\n";
    my @port_mapping = $gwdev->getportmappingentry();
    my $port_num = 0;
    foreach my $port_entry (@port_mapping) {
        if ($port_entry) {
            my $port_map_name = $port_entry->{'NewPortMappingDescripti
+on'};
            if (length($port_map_name) <= 0) {
                $port_map_name = "(No name)";
            }
            print "  [$port_num] : $port_map_name\n";
            foreach my $name ( keys %{$port_entry} ) {
                print "    $name = $port_entry->{$name}\n";
            }
        }
        else {
            print "  [$port_num] : Unknown\n";
        }
        $port_num++;
    }
}
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the array @dev_list is empty... so, what am I missing here?