diff --git a/usr/local/www/firewall_nat_out_edit.php b/usr/local/www/firewall_nat_out_edit.php
index 5057ea8510..9456206cb1 100755
--- a/usr/local/www/firewall_nat_out_edit.php
+++ b/usr/local/www/firewall_nat_out_edit.php
@@ -46,7 +46,7 @@ require("filter.inc");
 require("shaper.inc");
 
 if (!is_array($config['nat']['advancedoutbound']))
-        $config['nat']['advancedoutbound'] = array();
+	$config['nat']['advancedoutbound'] = array();
 
 if (!is_array($config['nat']['advancedoutbound']['rule'])) {
 	$config['nat']['advancedoutbound']['rule'] = array();
@@ -218,6 +218,9 @@ if ($_POST) {
 		}
 	}
 
+	// Allow extending of the firewall edit page and include custom input validation 
+	pfSense_handle_custom_code("/usr/local/pkg/firewall_aon/input_validation");
+
 	if (!$input_errors) {
 	        $natent = array();
 		$natent['source']['network'] = $osn;
@@ -274,6 +277,9 @@ if ($_POST) {
 			$natent['destination']['not'] = true;
 		}
 
+		// Allow extending of the firewall edit page and include custom input validation 
+		pfSense_handle_custom_code("/usr/local/pkg/firewall_aon/pre_write_config");
+
 		if (isset($id) && $a_out[$id]) {
 			$a_out[$id] = $natent;
 		} else {
@@ -396,6 +402,10 @@ function poolopts_change() {
 				<tr>
 					<td colspan="2" valign="top" class="listtopic"><?=gettext("Edit Advanced Outbound NAT entry");?></td>
 				</tr>
+<?php
+		// Allow extending of the firewall edit page and include custom input validation 
+		pfSense_handle_custom_code("/usr/local/pkg/firewall_rules/htmlphpearly");
+?>
 	        <tr>
                   <td width="22%" valign="top" class="vncell"><?=gettext("Do not NAT");?></td>
                   <td width="78%" class="vtable">
@@ -629,6 +639,10 @@ any)");?></td>
                     <br> <span class="vexpl"><?=gettext("You may enter a description here " .
                     "for your reference (not parsed).");?></span></td>
           </tr>
+<?php
+		// Allow extending of the firewall edit page and include custom input validation 
+		pfSense_handle_custom_code("/usr/local/pkg/firewall_rules/htmlphplate");
+?>
                 <tr>
                   <td width="22%" valign="top">&nbsp;</td>
                   <td width="78%">