diff --git a/html/webpage/assets/js/overview.js b/html/webpage/assets/js/overview.js
index 35e0fd1..884a26f 100644
--- a/html/webpage/assets/js/overview.js
+++ b/html/webpage/assets/js/overview.js
@@ -297,8 +297,8 @@ function LiveAudioCommand(command, bz, cbOK = null, cbFail = null) {
 /**
  * Websocket for streaming
  */
-let streamws = null;
-let mediasource = null;
+window.streamws = null;
+window.mediasource = null;
 
 $(document).ready(function () {
 
@@ -314,13 +314,13 @@ $(document).ready(function () {
                 }
                 $icon.toggleClass('fa-stop fa-play');
                 $("#listenzone").prop('disabled', false);
-                if (streamws) {
-                    streamws.close();
-                    streamws = null;
+                if (window.streamws) {
+                    window.streamws.close();
+                    window.streamws = null;
                 }
-                if (mediasource) {
-                    mediasource.endOfStream();
-                    mediasource = null;
+                if (window.mediasource) {
+                    window.mediasource.endOfStream();
+                    window.mediasource = null;
                 }
                 let audio = document.getElementById('listenaudio');
                 audio.src = "";
@@ -336,14 +336,14 @@ $(document).ready(function () {
                 }
                 $icon.toggleClass('fa-stop fa-play');
                 $("#listenzone").prop('disabled', true);
-                streamws = new WebSocket(`ws://${window.location.host}/api/LiveAudio/ws`);
-                streamws.binaryType = 'arraybuffer';
-                mediasource = new MediaSource();
+                window.streamws = new WebSocket(`ws://${window.location.host}/api/LiveAudio/ws`);
+                window.streamws.binaryType = 'arraybuffer';
+                window.mediasource = new MediaSource();
                 let audio = document.getElementById('listenaudio');
-                audio.src = URL.createObjectURL(mediasource);
-                mediasource.addEventListener('sourceopen', () => {
-                    const sourceBuffer = mediasource.addSourceBuffer('audio/mpeg');
-                    streamws.onmessage = (event) => {
+                audio.src = URL.createObjectURL(window.mediasource);
+                window.mediasource.addEventListener('sourceopen', () => {
+                    const sourceBuffer = window.mediasource.addSourceBuffer('audio/mpeg');
+                    window.streamws.onmessage = (event) => {
                         if (event.data instanceof ArrayBuffer) {
                             const chunk = new Uint8Array(event.data);
                             sourceBuffer.appendBuffer(chunk);
diff --git a/src/Main.kt b/src/Main.kt
index bf200f8..b20ca8d 100644
--- a/src/Main.kt
+++ b/src/Main.kt
@@ -33,7 +33,7 @@ lateinit var audioPlayer: AudioPlayer
 val StreamerOutputs: MutableMap<String, BarixConnection> = HashMap()
 lateinit var udpreceiver: UDPReceiver
 lateinit var tcpreceiver: TCPReceiver
-const val version = "0.0.14 (04/11/2025)"
+const val version = "0.0.15 (24/11/2025)"
 // AAS 64 channels
 const val max_channel = 64
 
diff --git a/src/web/WebApp.kt b/src/web/WebApp.kt
index e47bb6a..1263359 100644
--- a/src/web/WebApp.kt
+++ b/src/web/WebApp.kt
@@ -42,6 +42,7 @@ import org.apache.poi.xssf.usermodel.XSSFWorkbook
 import java.nio.file.Files
 import java.time.LocalDateTime
 import codes.configKeys
+import config
 import database.QueueTable
 import io.javalin.websocket.WsCloseStatus
 import org.tinylog.Logger
@@ -126,8 +127,11 @@ class WebApp(val listenPort: Int, val userlist: List<Pair<String, String>>, val
                     before { CheckUsers(it) }
                     ws("/ws") { ws ->
                         // WebSocket endpoint for home
-//
+                        ws.onConnect {
+                            it.enableAutomaticPings()
+                        }
                         ws.onMessage { wsMessageContext ->
+
                             try {
                                 val cmd =
                                     objectmapper.readValue(wsMessageContext.message(), WebsocketCommand::class.java)
@@ -207,43 +211,87 @@ class WebApp(val listenPort: Int, val userlist: List<Pair<String, String>>, val
                     }
                 }
                 path("soundbank.html") {
-                    before { CheckUsers(it) }
+                    before {
+                        val user = CheckUsers(it)
+                        // only admin user can access soundbank page
+                        if (GetAdminUserFromConfig() != user){
+                            it.redirect("overview.html")
+                        }
+                    }
                 }
                 path("messagebank.html") {
-                    before { CheckUsers(it) }
+                    before {
+                        val user = CheckUsers(it)
+                        // only admin user can access messagebank page
+                        if (GetAdminUserFromConfig() != user){
+                            it.redirect("overview.html")
+                        }
+                    }
                 }
                 path("language.html") {
-                    before { CheckUsers(it) }
+                    before {
+                        val user = CheckUsers(it)
+                        // only admin user can access language link page
+                        if (GetAdminUserFromConfig() != user) {
+                            it.redirect("overview.html")
+                        }
+                    }
                 }
                 path("log.html") {
                     before { CheckUsers(it) }
                 }
                 path("setting.html") {
-                    before { CheckUsers(it) }
+                    before {
+                        val user = CheckUsers(it)
+                        // only admin user can access settings page
+                        if (GetAdminUserFromConfig() != user){
+                            it.redirect("overview.html")
+                        }
+                    }
                 }
                 path("timer.html") {
-                    before { CheckUsers(it) }
+                    before {
+                        val user = CheckUsers(it)
+                        // only admin user can access timer page
+                        if (GetAdminUserFromConfig() != user){
+                            it.redirect("overview.html")
+                        }
+                    }
                 }
                 path("filemanagement.html") {
-                    before { CheckUsers(it) }
+                    before {
+                        val user = CheckUsers(it)
+                        // only admin user can access file management page
+                        if (GetAdminUserFromConfig() != user){
+                            it.redirect("overview.html")
+                        }
+                    }
                 }
                 path("broadcastzones.html") {
-                    before { CheckUsers(it) }
+                    before {
+                        val user = CheckUsers(it)
+                        // only admin user can access broadcast zones page
+                        if (GetAdminUserFromConfig() != user){
+                            it.redirect("overview.html")
+                        }
+                    }
                 }
                 path("overview.html") {
                     before { CheckUsers(it) }
                 }
-                path("setting.html") {
-                    before { CheckUsers(it) }
-                }
+
                 path("streamerstatus.html") {
                     before { CheckUsers(it) }
                 }
-                path("timer.html") {
-                    before { CheckUsers(it) }
-                }
+
                 path("usermanagement.html") {
-                    before { CheckUsers(it) }
+                    before {
+                        val user = CheckUsers(it)
+                        // only admin user can access user management page
+                        if (GetAdminUserFromConfig() != user){
+                            it.redirect("overview.html")
+                        }
+                    }
                 }
                 path("api") {
                     //TODO https://stackoverflow.com/questions/70002015/streaming-into-audio-element
@@ -2278,18 +2326,27 @@ class WebApp(val listenPort: Int, val userlist: List<Pair<String, String>>, val
         }
     }
 
-    fun CheckUsers(ctx: Context) {
+    fun CheckUsers(ctx: Context) : String? {
         //val user = ctx.sessionAttribute<String?>("user")
         val user = ctx.cookie("aas-user")
         if (user == null) {
             ctx.redirect("login.html")
+            return null
         }
         val foundUser = userlist.find { it.first == user }
         if (foundUser == null) {
             ctx.redirect("login.html")
+            return null
         }
+        return foundUser.first
     }
 
+    fun GetAdminUserFromConfig() : String{
+        return config.Get(configKeys.WEBAPP_ADMIN_USERNAME.key)
+    }
+
+
+
     fun Get_Barix_Connection_by_ZoneName(zonename: String): BarixConnection? {
         if (ValidString(zonename)) {
             val bz = db.broadcastDB.List.find { it.description == zonename }