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