Connecting to ucs from remote, umc returns a blank page

I am running several virtual hosts. Root directory is /var/www/. Startpage is empty. All domains have the root directory at /var/www/domain. I left all settings for univention as it was. /var/www/univention. Apache is set up at /etc/apache2/sites-available with sites enabled. I can reach all domains and the cms are working perfect. I use SSL redirect.
On localhost I can connect to UMC and see the portal or login page as I request.
From remote either with IP-address or I am getting as response a blank page with the following source-text:

<!DOCTYPE html>
<html xmlns="">
		<title>Univention Management Console</title>
		<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
		<meta http-equiv="X-UA-Compatible" content="IE=edge" />
		<meta name="viewport" content="width=device-width, initial-scale=1">
		<link rel="shortcut icon" href="/favicon.ico" type="image/x-icon" />
		<link rel="stylesheet" href="/univention/management/style.css" type="text/css"/>
		<link rel="stylesheet" href="/univention/js/dijit/themes/umc/umc.css" type="text/css"/>

		<script type="text/javascript" src="/univention/js/config.js"></script>
		<script type="text/javascript">
			//<!-- = {
				'*': {
					'umc/app': 'management',
					'umc/modules': 'management/modules'
			umcConfig.callback = function() {
				require(["umc/dialog", "umc/tools", "dojo/json", "dojox/html/entities", "umc/i18n!management"], function(dialog, tools, json, entities, _) {
					setTimeout(function() { /* dependency problem umc/dialog is not yet require()d in umc/tools*/
						var data = json.parse(entities.decode("{&quot;status&quot;: 404, &quot;message&quot;: &quot;The path '/portal' was not found.&quot;, &quot;traceback&quot;: null, &quot;location&quot;: &quot;;}"));
						var info = tools.parseError(data);
						var title = info.title || _('HTTP Error %s', info.status);
						var traceback = info.traceback || '';
						var message = info.message;

						var error_message = title + '\n' + message + '\n' + traceback;
						tools.showTracebackDialog(error_message, message, title).always(function() {
							setTimeout(function() {
								window.location.href = data.location || '/univention/management/';
							}, 1000);
					}, 1000);
		<script type="text/javascript" async src="/univention/js/dojo/dojo.js"></script>
	<body class="umc umcOverviewShown">
		<div id="umcTopContainer" class="umcTopContainer"></div>
			<div class="warningWrapper">
				<div class="warningCenterer"></div>
				<div class="warning" id="no-js">
					<div class="icon"></div>
					<div class="title">JavaScript required</div>
					<p>A browser with JavaScript enabled is required in order to use this service.</p>
					<p>When using Internet Explorer, please check your security settings and add this address to your trusted sites.</p>

Where do I have to correct redirect settings? Or what else is wrong?


did you solve this problem and might share your solution? I’m currently facing the same blank page.



Hi there,
did anyone find a solution? i am facing the same blank page.

Hi @philipp.wieseckel,
i think we have the same issue.

Which version do you use? ucr search --brief '^version/'

Do you also have 0 RAM at Services, like invoke-rc.d univention-management-console-server status and invoke-rc.d univention-management-console-web-server status

And in this log cat /var/log/apache2/error.log i got a lot of [proxy_http:error] and [proxy:error]

You can temporarily solve the problem by restarting the server.
I don’t know exactly how long that will last, but apparently only for a few hours.

best regard

Hi Hunter,no everything is fine for me except thet i login to UMC and it turns into a blank page.
I was running version 4.2-0 when this first occured, i have updatet to 4.4.-1 and it has not changed a bit.
Restarting unfortunately does nothing for me.


Turns out it was a problem with Firefox in my case! ?!?!?