Blocking all websites but one for single user

Question

I have a computer locked down to where all websites are blocked but one. The issue I am running into is the website that is allowed is not displaying properly. As in nothing on the website displays correctly. When you try and login it just keeps repeating back to the main login screen which looks like this. Any ideas?

This thread was automatically locked due to age.

Qoosh · Answer

Looking into the "developer options" of the chrome browser, or using something like WireShark may help with this. It will allow you to check if there are any other websites being contacted to present the login page you are accessing. 
 Taking a brief look, I can see the following sites are also being contacted when the sign-in page loads to name a few. - assets.kapehs.com - uploads.kapehs.com - maxcdn.bootstrapcd.com - gstatic.com

Walter DeLano · Answer

I was able to make it work, but I had to allow Business and Search Engines. Everything else is blocked. Thanks for the help.

Wayne Folta · Answer

That one website probably references multiple other websites in order to display properly. Pulling in CSS, pulling in Javascript, etc. So you basically need to go into your web browser's Web Inspector (or whatever it's called, part of the Developer tools) and see which sites are red in the page. Some of them will be ads and beacons, but some will be important for the website. Add them one at a time to your allowed list until the page displays properly.