diff --git a/pandora_console/ChangeLog b/pandora_console/ChangeLog
index 3b1d28988a..c511e6a5a9 100644
--- a/pandora_console/ChangeLog
+++ b/pandora_console/ChangeLog
@@ -1,3 +1,10 @@
+2011-08-19  Miguel de Dios  <miguel.dedios@artica.es>
+
+	* extensions/net_tools.php: fixed the try to execute any commands in the
+	extensions.
+	
+	Fixes: #3393861
+
 2011-08-18 Dario Rodriguez <dario.rodriguez@artica.es>
 
 	* operation/menu.php: Fixed a bug which hide extension icons.
diff --git a/pandora_console/extensions/net_tools.php b/pandora_console/extensions/net_tools.php
index 371b3598c4..633e36ab28 100644
--- a/pandora_console/extensions/net_tools.php
+++ b/pandora_console/extensions/net_tools.php
@@ -53,58 +53,116 @@ function main_net_tools () {
     
     switch($operation){
 
-        case 1: echo "<h3>".__("Traceroute to "). $ip. "</h3>";
-                echo "<pre>";
-                echo system ("/usr/sbin/traceroute $ip");
-                echo "</pre>";
+        case 1:
+    			if (!file_exists('/usr/sbin/traceroute')) {
+        			ui_print_error_message(__('Traceroute executable does not exist.'));
+        		}
+        		else {
+	        		echo "<h3>".__("Traceroute to "). $ip. "</h3>";
+	        		echo "<pre>";
+	                echo system ("/usr/sbin/traceroute $ip");
+	                echo "</pre>";
+        		}
                 break;
 
-        case 2: echo "<h3>".__("Ping to "). $ip. "</h3>";
-                echo "<pre>";
-                echo system ("ping -c 5 $ip");
-                echo "</pre>";
+        case 2: 
+				ob_start();
+        		system('whereis ping');
+        		$output = ob_get_clean();
+        		$result = explode(':', $output);
+        		$result = trim($result[1]);
+        		if (empty($result)) {
+        			ui_print_error_message(__('Ping executable does not exist.'));
+        		}
+        		else {
+	        		echo "<h3>".__("Ping to "). $ip. "</h3>";
+	                echo "<pre>";
+	                echo system ("ping -c 5 $ip");
+	                echo "</pre>";
+        		}
                 break;
                 
-        case 4: echo "<h3>".__("Basic TCP Scan on "). $ip. "</h3>";
-                echo "<pre>";
-                echo system ("nmap -F $ip");
-                echo "</pre>";
+        case 4: 
+        		ob_start();
+        		system('whereis nmap');
+        		$output = ob_get_clean();
+        		$result = explode(':', $output);
+        		$result = trim($result[1]);
+        		if (empty($result)) {
+        			ui_print_error_message(__('Nmap executable does not exist.'));
+        		}
+        		else {
+        			echo "<h3>".__("Basic TCP Scan on "). $ip. "</h3>";
+                	echo "<pre>";
+                	echo system ("nmap -F $ip");
+                	echo "</pre>";
+        		}
                 break;
         
-        case 5: echo "<h3>".__("Domain and IP information for "). $ip. "</h3>";
-                echo "<pre>";
-                echo system ("dig $ip");
-                echo system ("whois $ip");
-                echo "</pre>";
+        case 5: 
+        		echo "<h3>".__("Domain and IP information for "). $ip. "</h3>";
+				ob_start();
+        		system('whereis dig');
+        		$output = ob_get_clean();
+        		$result = explode(':', $output);
+        		$result = trim($result[1]);
+        		if (empty($result)) {
+        			ui_print_error_message(__('Dig executable does not exist.'));
+        		}
+        		else {
+        			echo "<pre>";
+                	echo system ("dig $ip");
+                	echo "</pre>";
+        		}
+        		ob_start();
+        		system('whereis whois');
+        		$output = ob_get_clean();
+        		$result = explode(':', $output);
+        		$result = trim($result[1]);
+        		if (empty($result)) {
+        			ui_print_error_message(__('Whois executable does not exist.'));
+        		}
+        		else {
+        			echo "<pre>";
+                	echo system ("whois $ip");
+                	echo "</pre>";
+                	
+        		}
                 break;
         case 3: echo "<h3>".__("SNMP information for "). $ip. "</h3>";
-
-                echo "<h4>Uptime</h4>";                
-                echo "<pre>";
-                echo exec ("snmpget -Ounv -v1 -c $community $ip .1.3.6.1.2.1.1.3.0 ");
-
-                echo "</pre>";
-
-                echo "<h4>Device info</h4>";                
-                echo "<pre>";
-
-                echo system ("snmpget -Ounv -v1 -c $community $ip .1.3.6.1.2.1.1.1.0 ");
-                echo "</pre>";
-
-                echo "<h4>Interface Information</h4>";                
-                echo "<table class=databox>";
-                echo "<tr><th>".__("Interface");
-                echo "<th>".__("Status");
-
-                $int_max =  exec ("snmpget -Oqunv -v1 -c $community $ip .1.3.6.1.2.1.2.1.0 ");
-
-                for ($ax=0; $ax < $int_max; $ax++){
-                    $interface = exec ("snmpget -Oqunv -v1 -c $community $ip .1.3.6.1.2.1.2.2.1.2.$ax ");
-                    $estado = exec ("snmpget -Oqunv -v1 -c $community $ip .1.3.6.1.2.1.2.2.1.8.$ax ");
-                    echo "<tr><td>$interface<td>$estado";
-                }
-                
-                echo "</table>";
+                ob_start();
+        		system('whereis snmpget');
+        		$output = ob_get_clean();
+        		$result = explode(':', $output);
+        		$result = trim($result[1]);
+        		if (empty($result)) {
+        			ui_print_error_message(__('SNMPget executable does not exist.'));
+        		}
+        		else {
+        			echo "<h4>Uptime</h4>";
+                	echo "<pre>";
+                	echo exec ("snmpget -Ounv -v1 -c $community $ip .1.3.6.1.2.1.1.3.0 ");
+                	echo "</pre>";
+	        		echo "<h4>Device info</h4>";              
+	                echo "<pre>";
+	
+	                echo system ("snmpget -Ounv -v1 -c $community $ip .1.3.6.1.2.1.1.1.0 ");
+	                echo "</pre>";
+	
+	                echo "<h4>Interface Information</h4>";                
+	                echo "<table class=databox>";
+	                echo "<tr><th>".__("Interface");
+	                echo "<th>".__("Status");
+	
+	                $int_max =  exec ("snmpget -Oqunv -v1 -c $community $ip .1.3.6.1.2.1.2.1.0 ");
+	
+	                for ($ax=0; $ax < $int_max; $ax++){
+	                    $interface = exec ("snmpget -Oqunv -v1 -c $community $ip .1.3.6.1.2.1.2.2.1.2.$ax ");
+	                    $estado = exec ("snmpget -Oqunv -v1 -c $community $ip .1.3.6.1.2.1.2.2.1.8.$ax ");
+	                    echo "<tr><td>$interface<td>$estado";
+	                }
+	                echo "</table>";
+        		}
                 break;
     }