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