diff --git a/luciexpress/htdocs/js/app.js b/luciexpress/htdocs/js/app.js
index 67599bf0d..6f60036d8 100644
--- a/luciexpress/htdocs/js/app.js
+++ b/luciexpress/htdocs/js/app.js
@@ -122,7 +122,7 @@ JUCI.app.config(function ($stateProvider, $locationProvider, $compileProvider, $
 	$rootScope.errors = []; 
 	$rootScope.$on("error", function(ev, data){
 		$rootScope.errors.push({message: data}); 
-		console.log("ERROR: "+ev.name+": "+JSON.stringify(Object.keys(ev.currentScope))); 
+		//console.log("ERROR: "+ev.name+": "+JSON.stringify(Object.keys(ev.currentScope))); 
 	}); 
 	// set current language
 	gettextCatalog.currentLanguage = "en"; 
diff --git a/luciexpress/htdocs/js/uci.js b/luciexpress/htdocs/js/uci.js
index a3382b5dc..e597a56fb 100644
--- a/luciexpress/htdocs/js/uci.js
+++ b/luciexpress/htdocs/js/uci.js
@@ -283,10 +283,14 @@
 			return deferred.promise(); 
 		}
 		
+		/*
 		UCISection.prototype.$save = function(){
 			var deferred = $.Deferred(); 
 			var self = this; 
 			
+			// try to validate the section using section wide validator
+			if(self[".validator"] instanceof Function) self[".validator"](self); 
+			
 			$rpc.uci.set({
 				config: self[".config"][".name"], 
 				section: self[".name"], 
@@ -297,7 +301,7 @@
 				deferred.reject(); 
 			}); 
 			return deferred.promise(); 
-		}
+		}*/
 		
 		UCISection.prototype.$delete = function(){
 			var self = this; 
@@ -326,6 +330,9 @@
 			if(!type) return {}; 
 			var self = this; 
 			var changed = {}; 
+			
+			if(type[".validator"] instanceof Function) type[".validator"](self); 
+			
 			Object.keys(type).map(function(k){
 				if(self[k] && self[k].dirty){ 
 					//console.log("Adding dirty field: "+k); 
@@ -443,12 +450,13 @@
 			}); 
 		}
 		
-		UCIConfig.prototype.$registerSectionType = function(name, descriptor){
+		UCIConfig.prototype.$registerSectionType = function(name, descriptor, validator){
 			var config = this[".name"]; 
 			var conf_type = section_types[config]; 
 			if(typeof conf_type === "undefined") conf_type = section_types[config] = {}; 
 			conf_type[name] = descriptor; 
 			this["@"+name] = []; 
+			if(validator !== undefined && validator instanceof Function) conf_type[name][".validator"] = validator; 
 			console.log("Registered new section type "+config+"."+name); 
 		}
 		
diff --git a/luciexpress/htdocs/plugins/core/widgets/luci.config.js b/luciexpress/htdocs/plugins/core/widgets/luci.config.js
index 26cbb4d7f..1baadff3d 100644
--- a/luciexpress/htdocs/plugins/core/widgets/luci.config.js
+++ b/luciexpress/htdocs/plugins/core/widgets/luci.config.js
@@ -75,19 +75,30 @@ $juci.module("core")
 			'<button class="btn btn-lg btn-primary" ng-click="onApply()" ng-disabled="busy"><i class="fa fa-spinner" ng-show="busy"/>{{ "Apply"| translate }}</button><button class="btn btn-lg btn-default" ng-click="onCancel()">{{ "Cancel" | translate }}</button>'+
 			'</div><div style="clear: both;"></div></div>', 
 		replace: true, 
+		scope: {
+			onPreApply: "&"
+		}, 
 		controller: "luciConfigApplyController"
 	 }; 
 }).controller("luciConfigApplyController", function($scope, $uci){
 	$scope.onApply = function(){
+		if($scope.onPreApply) $scope.onPreApply(); 
 		$scope.busy = 1; 
-		$uci.save().done(function(){
-			console.log("Saved uci configuration!"); 
-		}).fail(function(){
-			console.error("Could not save uci configuration!"); 
-		}).always(function(){
+		try {
+			$uci.save().done(function(){
+				console.log("Saved uci configuration!"); 
+			}).fail(function(){
+				console.error("Could not save uci configuration!"); 
+			}).always(function(){
+				$scope.busy = 0; 
+				setTimeout(function(){$scope.$apply();}, 0); 
+			}); 
+		} catch(e){
 			$scope.busy = 0; 
 			setTimeout(function(){$scope.$apply();}, 0); 
-		}); 
+			$scope.$emit("error", e.message); 
+			console.error("Error while applying config: "+e.message); 
+		}
 	}
 	$scope.onCancel = function(){
 		// simple way to reset
diff --git a/luciexpress/htdocs/plugins/core/widgets/luci.errors.html b/luciexpress/htdocs/plugins/core/widgets/luci.errors.html
index eb5f054ba..6969b8c20 100644
--- a/luciexpress/htdocs/plugins/core/widgets/luci.errors.html
+++ b/luciexpress/htdocs/plugins/core/widgets/luci.errors.html
@@ -1,5 +1,5 @@
 <div class="alert alert-danger" ng-show="errors.length">
 	<ul>
-		<li ng-repeat="err in errors"><button class="btn btn-default pull-right">Hide</button>{{err.message}}<div style="clear: both;"></div></li>
+		<li ng-repeat="err in errors track by $index"><!--<button class="btn btn-default pull-right" >Hide</button>-->{{(err.message||err)}}<div style="clear: both;"></div></li>
 	</ul>
 </div>
diff --git a/luciexpress/htdocs/plugins/core/widgets/luci.errors.js b/luciexpress/htdocs/plugins/core/widgets/luci.errors.js
index 212b64872..99fa1c39d 100644
--- a/luciexpress/htdocs/plugins/core/widgets/luci.errors.js
+++ b/luciexpress/htdocs/plugins/core/widgets/luci.errors.js
@@ -4,6 +4,7 @@ JUCI.app
 	return {
 		// accepted parameters for this tag
 		scope: {
+			ngModel: "="
 		}, 
 		templateUrl: plugin_root+"/widgets/luci.errors.html", 
 		replace: true, 
@@ -11,6 +12,6 @@ JUCI.app
 	}; 
 })
 .controller("luciErrors", function($scope, $rootScope, $localStorage){
-	
-	$scope.errors = $rootScope.errors; 
+	if($scope.ngModel) $scope.errors = $scope.ngModel; 
+	else $scope.errors = $rootScope.errors; 
 }); 
diff --git a/luciexpress/htdocs/plugins/wifi/widgets/uci.wireless.interface.html b/luciexpress/htdocs/plugins/wifi/widgets/uci.wireless.interface.html
index 52c4f82ca..f918da1f8 100644
--- a/luciexpress/htdocs/plugins/wifi/widgets/uci.wireless.interface.html
+++ b/luciexpress/htdocs/plugins/wifi/widgets/uci.wireless.interface.html
@@ -19,7 +19,7 @@
 			</luci-config-lines>
 			<luci-config-lines ng-hide="interface.disabled.value">
 				<luci-config-line title="{{'wifi-iface.ssid'|translate}}">
-					<input type="text" class="form-control" placeholder="Wifi Name" ng-model="interface.ssid.value"/>
+					<input type="text" class="form-control" placeholder="Wifi Name" ng-model="interface.ssid.value" maxlength="32"/>
 				</luci-config-line>
 				<luci-config-line title="{{'wifi-iface.closed'|translate}}">
 					<switch id="enabled" name="enabled" ng-model="interface.closed.value" class="green" inverted></switch>
@@ -30,17 +30,18 @@
 				<luci-config-line title="{{'wifi-iface.encryption'|translate}}">
 					<luci-select ng-model="interface.encryption.value" ng-items="cryptoChoices" placeholder="Choose Protection"/>
 				</luci-config-line>
-				<luci-config-line title="{{'wifi-iface.key'|translate}}">
-					<input type="{{(!showPassword)?'password':'text'}}" class="form-control" placeholder="{{'wifi-iface.key'|translate}}" ng-model="interface.key.value"/>
-                    <div class="checkbox checkbox-info">
-                        <input type="checkbox" ng-model="showPassword" />
-                        <label><strong>{{'Display Characters'|translate}}</strong></label>
-                    </div>
+				<luci-config-line title="{{'wifi-iface.key'|translate}}" ng-show="interface.encryption.value != 'none'">
+					<input type="{{(!showPassword)?'password':'text'}}" class="form-control" placeholder="{{'wifi-iface.key'|translate}}" ng-model="interface.key.value" />
+					<div class="checkbox checkbox-info">
+						<input type="checkbox" ng-model="showPassword" />
+						<label><strong>{{'Display Characters'|translate}}</strong></label>
+					</div>
 				</luci-config-line>
 			</luci-config-lines>
+			<luci-errors ng-model="errors"/>
 		</div>
 		<div class="panel-footer" ng-show="expanded">
-			<luci-config-apply></luci-config-apply>
+			<luci-config-apply on-pre-apply="onPreApply()"></luci-config-apply>
 		</div>
 	</div>
 </div>
diff --git a/luciexpress/htdocs/plugins/wifi/widgets/uci.wireless.interface.js b/luciexpress/htdocs/plugins/wifi/widgets/uci.wireless.interface.js
index e293657c9..158088164 100644
--- a/luciexpress/htdocs/plugins/wifi/widgets/uci.wireless.interface.js
+++ b/luciexpress/htdocs/plugins/wifi/widgets/uci.wireless.interface.js
@@ -11,6 +11,11 @@ $juci.module("wifi")
 		require: "^ngModel"
 	 };  
 }).controller("WifiInterfaceController", function($scope, $uci, gettext){
+	$scope.errors = []; 
+	$scope.$on("error", function(ev, err){
+		ev.stopPropagation(); 
+		$scope.errors.push(err); 
+	}); 
 	$scope.$watch("interface", function(value){
 		try {
 			$scope.cryptoChoices = $scope.interface.encryption.schema.allow;
@@ -26,5 +31,8 @@ $juci.module("wifi")
 			x[".frequency"] = dev[".label"]; 
 		}); 
 		$scope.title = "wifi-iface.name="+$scope.interface[".name"]; 
-	}); 
+	});
+	$scope.onPreApply = function(){
+		$scope.errors.length = 0; 
+	}
 }); 
diff --git a/luciexpress/htdocs/plugins/wifi/wifi.js b/luciexpress/htdocs/plugins/wifi/wifi.js
index 3ecf948a4..b2984028c 100644
--- a/luciexpress/htdocs/plugins/wifi/wifi.js
+++ b/luciexpress/htdocs/plugins/wifi/wifi.js
@@ -67,6 +67,25 @@ JUCI.app
 		"macmode":		{ dvalue: 1, type: Number, allow: [ 0, 1, 2 ] },
 		"macfilter":	{ dvalue: false, type: Boolean },
 		"maclist":		{ dvalue: [], type: Array, match_each: /^([0-9A-Fa-f]{2}[:-]){5}([0-9A-Fa-f]{2})$/ }
+	}, function validator(section){
+		// validate ssid
+		if(section.ssid.value.length >= 32) 
+			throw new Error("SSID string can be at most 32 characters long!"); 
+		// validate keys
+		switch(section.encryption.value){
+			case "wep": {
+				if(!section.key.value || !section.key.value.match(/[a-f0-9A-F]{10,26}/)) 
+					throw new Error("WEP encryption key must be 10-26 hexadecimal characters!"); 
+			} break;
+			case "psk": 
+			case "psk2": 
+			case "mixed-psk": {
+				if(!section.key.value || !(section.key.value.length > 8 && section.key.value.length < 64))
+					throw new Error("WPA key must be 8-63 characters long!"); 
+			} break; 
+			default: 
+				break; 
+		}
 	});