If you have a Netscaler and are using the Citrix Access Gateway (aka Netscaler Gateway now), you might have users using IE 11 (Internet Explorer 11) complain they are getting a blank page. Chrome and Firefox will work fine but IE11 just doesn’t want to show the login page. A quick work around is to tell the user to view the site in compatibility mode or use a different browser but that will annoy users after some time. You have to make it as easy as possible for your users since not all of them are going to be tech savvy.
The best thing to do is force Internet Explorer into compatibility mode on page load. Just open up the index.html running in flash and the one in your theme:
Flash - /netscaler/ns_gui/vpn/index.html Theme - /var/vpn/themes/Horizon1/ns_gui/vpn/index.html
and add the following line in header at the top before the body tag:
<META http-equiv="X-UA-Compatible" content="IE=EmulateIE9" />
You can choose which version of IE to emulate and Stackoverflow has an excellent post on the differences between each here:
In my experience, sticking with emulating IE9 works great with the Access Gateway. Users won’t even know the difference. Hope this helps!