Revert "fix prev."

This reverts commit 88580477.

src/etc/inc/filter.inc

@@ -1150,12 +1150,14 @@ function filter_nat_rules_automatic_tonathosts(&$FilterIflist, $with_descr = fal
     }
 
     /* PPPoE subnet */
-    foreach (array($FilterIflist['pppoe']['items']) as $pppoe) {
+    if (isset($FilterIflist['pppoe']['items']) && is_array($FilterIflist['pppoe']['items'])) {
+        foreach ($FilterIflist['pppoe']['items'] as $pppoe) {
             if (is_private_ip($pppoe['ip'])) {
                 $tonathosts[] = "{$pppoe['sa']}/{$pppoe['sn']}";
                 $descriptions[] = gettext("PPPoE server");
             }
         }
+    }
 
     /* L2TP subnet */
     if (isset($FilterIflist['l2tp']) && $FilterIflist['l2tp']['mode'] == "server") {
@@ -1168,19 +1170,23 @@ function filter_nat_rules_automatic_tonathosts(&$FilterIflist, $with_descr = fal
     }
 
     /* add openvpn interfaces */
-    foreach (array($config['openvpn']['openvpn-server']) as $ovpnsrv) {
+    if (isset($config['openvpn']['openvpn-server'])) {
+        foreach ($config['openvpn']['openvpn-server'] as $ovpnsrv) {
             if (!isset($ovpnsrv['disable']) && !empty($ovpnsrv['tunnel_network'])) {
                 $tonathosts[] = $ovpnsrv['tunnel_network'];
                 $descriptions[] = gettext("OpenVPN server");
             }
         }
+    }
 
-    foreach (array($config['openvpn']['openvpn-client']) as $ovpncli) {
+    if (isset($config['openvpn']['openvpn-client'])) {
+        foreach ($config['openvpn']['openvpn-client'] as $ovpncli) {
             if (!isset($ovpncli['disable']) && !empty($ovpncli['tunnel_network'])) {
                 $tonathosts[] = $ovpncli['tunnel_network'];
                 $descriptions[] = gettext("OpenVPN client");
             }
         }
+    }
 
     /* IPsec mode_cfg subnet */
     if (isset($config['ipsec']['client']['enable']) &&