The outage has been resolved, and our engineers are investigating what happened. We apologize for the inconvenience! If you're still having trouble with the site, please contact us via our Contact Page: https://www.udacity.com/contact.
Posted Sep 25, 2017 - 13:55 PDT
Our website is down at the moment and we are investigating the issue. We will update this page as soon as we have more information, and we sincerely apologize for the inconvenience!