diff --git a/interface/lib/classes/functions.inc.php b/interface/lib/classes/functions.inc.php
index e5f056082b70ea1f608a6eb41c61feacf9bc5350..8ec44964536155a98128d7f3d8b7ea50a523842c 100644
--- a/interface/lib/classes/functions.inc.php
+++ b/interface/lib/classes/functions.inc.php
@@ -186,7 +186,8 @@ class functions {
 		global $app;
 
 		if($type == 'IPv4'){
-			$regex = "/^[0-9]{1,3}(\.)[0-9]{1,3}(\.)[0-9]{1,3}(\.)[0-9]{1,3}$/";
+//			$regex = "/^[0-9]{1,3}(\.)[0-9]{1,3}(\.)[0-9]{1,3}(\.)[0-9]{1,3}$/";
+			$regex = "/^((25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.){3}(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$/";
 		} else {
 			// IPv6
 			$regex = "/^(\:\:([a-f0-9]{1,4}\:){0,6}?[a-f0-9]{0,4}|[a-f0-9]{1,4}(\:[a-f0-9]{1,4}){0,6}?\:\:|[a-f0-9]{1,4}(\:[a-f0-9]{1,4}){1,6}?\:\:([a-f0-9]{1,4}\:){1,6}?[a-f0-9]{1,4})(\/\d{1,3})?$/i";
diff --git a/interface/lib/classes/tform_base.inc.php b/interface/lib/classes/tform_base.inc.php
index 784e96a448fe49f2407987cb2f080480edc717cf..4b5a76c5f14a7406eb50c7d5383b771c21b3cf29 100644
--- a/interface/lib/classes/tform_base.inc.php
+++ b/interface/lib/classes/tform_base.inc.php
@@ -1058,11 +1058,10 @@ class tform_base {
 				}
 				break;
 
-
-
 			case 'ISIPV4':
 				$vip=1;
-				if(preg_match("/^[0-9]{1,3}(\.)[0-9]{1,3}(\.)[0-9]{1,3}(\.)[0-9]{1,3}$/", $field_value)){
+//				if(preg_match("/^[0-9]{1,3}(\.)[0-9]{1,3}(\.)[0-9]{1,3}(\.)[0-9]{1,3}$/", $field_value)){
+				if(preg_match("/^((25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.){3}(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$/", $field_value)){
 					$groups=explode(".", $field_value);
 					foreach($groups as $group){
 						if($group<0 or $group>255)
@@ -1078,6 +1077,7 @@ class tform_base {
 					}
 				}
 				break;
+
 			case 'ISIP':
 				if($validator['allowempty'] != 'y') $validator['allowempty'] = 'n';
 				if($validator['allowempty'] == 'y' && $field_value == '') {
@@ -1107,7 +1107,8 @@ class tform_base {
 							if(preg_match("/^(\:\:([a-f0-9]{1,4}\:){0,6}?[a-f0-9]{0,4}|[a-f0-9]{1,4}(\:[a-f0-9]{1,4}){0,6}?\:\:|[a-f0-9]{1,4}(\:[a-f0-9]{1,4}){1,6}?\:\:([a-f0-9]{1,4}\:){1,6}?[a-f0-9]{1,4})(\/\d{1,3})?$/i", $field_value)){
 								$ip_ok = 1;
 							}
-							if(preg_match("/^[0-9]{1,3}(\.)[0-9]{1,3}(\.)[0-9]{1,3}(\.)[0-9]{1,3}$/", $field_value)){
+//							if(preg_match("/^[0-9]{1,3}(\.)[0-9]{1,3}(\.)[0-9]{1,3}(\.)[0-9]{1,3}$/", $field_value)){
+							if(preg_match("/^((25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.){3}(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$/", $field_value)){
 								$ip_ok = 1;
 							}
 							if($ip_ok == 0) {
diff --git a/interface/lib/classes/validate_database.inc.php b/interface/lib/classes/validate_database.inc.php
index 0e6ffef5d504926389a4098163e3fe1875e9954b..e348afe62c2dd1021ed4f318213dd6b24ab67e1a 100644
--- a/interface/lib/classes/validate_database.inc.php
+++ b/interface/lib/classes/validate_database.inc.php
@@ -44,7 +44,8 @@ class validate_database {
 				$cur_value = trim($cur_value);
 
 				$valid = true;
-				if(preg_match("/^[0-9]{1,3}(\.)[0-9]{1,3}(\.)[0-9]{1,3}(\.)[0-9]{1,3}$/", $cur_value)) {
+//				if(preg_match("/^[0-9]{1,3}(\.)[0-9]{1,3}(\.)[0-9]{1,3}(\.)[0-9]{1,3}$/", $cur_value)) {
+				if(preg_match("/^((25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.){3}(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$/", $cur_value)) {
 					$groups = explode(".", $cur_value);
 					foreach($groups as $group){
 						if($group<0 or $group>255)
diff --git a/interface/lib/classes/validate_dns.inc.php b/interface/lib/classes/validate_dns.inc.php
index a6920e0b01d4f033326b148f425d34631d2cb9bb..211d1639b65f7c6ccb47dd93ab19c5a6eff54db1 100644
--- a/interface/lib/classes/validate_dns.inc.php
+++ b/interface/lib/classes/validate_dns.inc.php
@@ -315,7 +315,8 @@ class validate_dns {
 					if(preg_match("/^(\:\:([a-f0-9]{1,4}\:){0,6}?[a-f0-9]{0,4}|[a-f0-9]{1,4}(\:[a-f0-9]{1,4}){0,6}?\:\:|[a-f0-9]{1,4}(\:[a-f0-9]{1,4}){1,6}?\:\:([a-f0-9]{1,4}\:){1,6}?[a-f0-9]{1,4})(\/\d{1,3})?$/i", $field_value)){
 						$ip_ok = 1;
 					}
-					if(preg_match("/^[0-9]{1,3}(\.)[0-9]{1,3}(\.)[0-9]{1,3}(\.)[0-9]{1,3}$/", $field_value)){
+//					if(preg_match("/^[0-9]{1,3}(\.)[0-9]{1,3}(\.)[0-9]{1,3}(\.)[0-9]{1,3}$/", $field_value)){
+					if(preg_match("/^((25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.){3}(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$/", $field_value)){
 						$ip_ok = 1;
 					}
 					if($ip_ok == 0) {
diff --git a/server/lib/classes/functions.inc.php b/server/lib/classes/functions.inc.php
index ec07a83cc941512dfd2d3e705d6766440887eb60..6a46d5e7fc3f2deb260ff7a5ce65af6a1515942a 100644
--- a/server/lib/classes/functions.inc.php
+++ b/server/lib/classes/functions.inc.php
@@ -230,7 +230,8 @@ class functions {
 		global $app;
 
 		if($type == 'IPv4'){
-			$regex = "/^[0-9]{1,3}(\.)[0-9]{1,3}(\.)[0-9]{1,3}(\.)[0-9]{1,3}$/";
+//			$regex = "/^[0-9]{1,3}(\.)[0-9]{1,3}(\.)[0-9]{1,3}(\.)[0-9]{1,3}$/";
+			$regex = "/^((25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.){3}(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$/";
 		} else {
 			// IPv6
 			$regex = "/^(\:\:([a-f0-9]{1,4}\:){0,6}?[a-f0-9]{0,4}|[a-f0-9]{1,4}(\:[a-f0-9]{1,4}){0,6}?\:\:|[a-f0-9]{1,4}(\:[a-f0-9]{1,4}){1,6}?\:\:([a-f0-9]{1,4}\:){1,6}?[a-f0-9]{1,4})(\/\d{1,3})?$/i";
diff --git a/server/plugins-available/mysql_clientdb_plugin.inc.php b/server/plugins-available/mysql_clientdb_plugin.inc.php
index 2f2171f19b11294df77bf47d8b36f653c1495577..7a5128a08d9c63a57f8ddb734db4796c399d0c26 100644
--- a/server/plugins-available/mysql_clientdb_plugin.inc.php
+++ b/server/plugins-available/mysql_clientdb_plugin.inc.php
@@ -101,7 +101,8 @@ class mysql_clientdb_plugin {
 			$valid = true;
 			if($db_host == '%' || $db_host == 'localhost') {
 				$valid = true;
-			} elseif(preg_match("/^[0-9]{1,3}(\.)[0-9]{1,3}(\.)[0-9]{1,3}(\.)[0-9]{1,3}$/", $db_host)) {
+//			} elseif(preg_match("/^[0-9]{1,3}(\.)[0-9]{1,3}(\.)[0-9]{1,3}(\.)[0-9]{1,3}$/", $db_host)) {
+			} elseif(preg_match("/^((25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.){3}(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$/", $db_host)) {
 				$groups = explode('.', $db_host);
 				foreach($groups as $group){
 					if($group<0 or $group>255)