255 ||
$Octets[1] < 0 ||
$Octets[1] > 255 ||
$Octets[2] < 0 ||
$Octets[2] > 255 ||
$Octets[3] < 0 ||
$Octets[3] > 255 ||
/*
* Per RFC 1918, the following CIDR blocks should never be found on the public Internet.
* 10.0.0.0/8
* 172.16.0.0/12
* 192.168.0.0/16
*
* Per RFC 3330, the block 127.0.0.0/8 should never appear on any network.
*
*/
$Octets[0] == 127 ||
$Octets[0] == 10 ||
($Octets[0] == 172 && ((16 <= $Octets[1]) && ($Octets[1] <= 31))) ||
($Octets[0] == 192 && $Octets[1] == 168)
) {
die('Invalid IPv4 address');
}
// Valid port numbers are defined in RFC 1700
if (empty($_GET['port']) || !is_number($_GET['port']) || $_GET['port'] < 1 || $_GET['port'] > 65535) {
die('Invalid port');
}
// Error suppression, ugh.
if (@fsockopen($_GET['ip'], $_GET['port'], $Errno, $Errstr, 20)) {
die('Port '.$_GET['port'].' on '.$_GET['ip'].' connected successfully.');
} else {
die('Port '.$_GET['port'].' on '.$_GET['ip'].' failed to connect.');
}
}
View::show_header('Connectability Checker');
?>