We check this website, now msudenver.edu is up and dont blocked for our system and other users of the Internet.
So, answer to question: Is msudenver Down Right Now? - NO! msudenver is up!
If you have problem with access to site msudenver, and domain msudenver.edu is not avalible.
Clear browser cache and/or try other web browser
(Chrome, Firefox or Safari).