function createBase()
{
- $iptables = System::which('iptables');
- if (!$iptables) {
+ require_once 'System.php';
+
+ $iptables = System::which('iptables', '/sbin/iptables');
+
+ if (!$iptables || !file_exists($iptables)) {
$this->jerr("iptables could not be found.");
}