diff --git a/cis/testtool/externeueberwachung.js b/cis/testtool/externeueberwachung.js
index 65143290d..71951779f 100644
--- a/cis/testtool/externeueberwachung.js
+++ b/cis/testtool/externeueberwachung.js
@@ -1,34 +1,15 @@
 (function () {
-	/*
-
-	const params = new URLSearchParams(location.search);
-	let expectedOrigin = params.get("examus-client-origin");
-
-	if (!expectedOrigin)
-	{
-		window.top.location.href = 'resetconnection.php';
-		return;
+	function sendMessage() {
+		let frame = window.frames['content'];
+		if (frame)
+			frame.postMessage({ type: "proctoringReady" });
 	}
-	*/
-	let proctoringOK = false;
 
-	window.addEventListener("message", function (e) {
-		/*if (e.origin !== expectedOrigin) {
-			return;
-		}*/
-
-		const data = e.data || {};
-
-		if (data.proctoringIsActive)
+	window.addEventListener("message", function (e)
+	{
+		if (e.data.indexOf("proctoringReady_") === 0)
 		{
-			proctoringOK = true;
+			sendMessage();
 		}
 	});
-
-	setTimeout(function () {
-		if (!proctoringOK)
-		{
-			top.location.href='resetconnection.php';
-		}
-	}, 1000);
-})();
\ No newline at end of file
+})();
diff --git a/cis/testtool/frage.css b/cis/testtool/frage.css
new file mode 100644
index 000000000..04024ae53
--- /dev/null
+++ b/cis/testtool/frage.css
@@ -0,0 +1,30 @@
+.proctoring-blocker
+{
+	position: fixed;
+	inset: 0;
+	z-index: 99999;
+	backdrop-filter: blur(6px);
+	pointer-events: all;
+	user-select: none;
+}
+
+.proctoring-blocker.hidden
+{
+	display: none !important;
+}
+
+.proctoring-text
+{
+	position: absolute;
+	top: 50%;
+	left: 50%;
+	transform: translate(-50%, -50%);
+	color: #fff;
+	font-size: 16px;
+	font-family: sans-serif;
+}
+
+.proctoring-blur-fallback
+{
+	filter: blur(6px);
+}
diff --git a/cis/testtool/frage.php b/cis/testtool/frage.php
index 4267d6a13..bf2ee24c5 100644
--- a/cis/testtool/frage.php
+++ b/cis/testtool/frage.php
@@ -183,7 +183,9 @@ if(!isset($_SESSION['pruefling_id']))
 	die($p->t('testtool/bitteZuerstAnmelden'));
 
 if (!empty($_SESSION['externe_ueberwachung']) && isset($_SESSION['externe_ueberwachung_verified'])): ?>
-	<script type="text/javascript" src="externeueberwachung.js"></script>
+	<link href="frage.css" rel="stylesheet" type="text/css" />
+	<script type="text/javascript" src="frage_externe_ueberwachung.js"></script>
+	<div id="proctoringBlocker" class="proctoring-blocker hidden"></div>
 <?php endif;
 
 $pruefling = new pruefling();
diff --git a/cis/testtool/frage_externe_ueberwachung.js b/cis/testtool/frage_externe_ueberwachung.js
new file mode 100644
index 000000000..31a7b414f
--- /dev/null
+++ b/cis/testtool/frage_externe_ueberwachung.js
@@ -0,0 +1,53 @@
+(function () {
+	let ok = false;
+	let blocker;
+
+	function showBlocker() {
+		blocker = document.getElementById("proctoringBlocker");
+
+		if (!blocker)
+		{
+			blocker = document.createElement("div");
+			blocker.id = "proctoringBlocker";
+			blocker.className = "proctoring-blocker";
+			blocker.innerHTML = '<div class="proctoring-text">Loading...</div>';
+			document.body.appendChild(blocker);
+		}
+		document.documentElement.classList.add("proctoring-blur-fallback");
+	}
+
+	function block() {
+		showBlocker();
+		blocker.classList.remove("hidden");
+	}
+
+	function unblock() {
+		document.documentElement.classList.remove("proctoring-blur-fallback");
+		if (!blocker) return;
+		blocker.classList.add("hidden");
+	}
+
+	const blockTimer = setTimeout(function () {
+		if (!ok)
+			block();
+	}, 1500);
+
+	window.addEventListener("message", function (e) {
+		const data = e.data || {};
+
+		if (data.type === "proctoringReady")
+		{
+			ok = true;
+			clearTimeout(blockTimer);
+			unblock();
+		}
+	});
+
+	setTimeout(function () {
+		if (!ok) {
+			top.location.href = "resetconnection.php";
+		}
+	}, 3000);
+})();
+
+
diff --git a/cis/testtool/index.php b/cis/testtool/index.php
index 9aa6c3f84..6f2cfac26 100644
--- a/cis/testtool/index.php
+++ b/cis/testtool/index.php
@@ -22,6 +22,7 @@ if ((isset($_SESSION['externe_ueberwachung']) && $_SESSION['externe_ueberwachung
 	<link href="../../skin/style.css.php" rel="stylesheet" type="text/css">
 	<?php
 	if (!empty($_SESSION['externe_ueberwachung'])) : ?>
+	<script type="text/javascript" src="externeueberwachung.js"></script>
 	<script>
 		function loadInContent(url)
 		{