Hughesnet called back yesterday with unknown caller on caller ID and the person sounded like she was reading me a script saying they were working on speeding up Internet response time. I interrupted her and told her my problem was with not getting at a certain web site so she put me on hold and we were disconnected in a minute or so.
I have been having the same problem as you also using multiple browsers. I have done what you did to reach TreasuryDirect.gov using a tablet (and also my smart phone) but from another ISP. I have tried the suggested fix about web acceleration but that had no impact. Do you have any idea what happened to allow you access and are you still able to access tha site?
All I know was I could not use the Internet one night and the next day learned that was an outage. When I tried treasurydirect.gov the next day it worked. I just tried again and got in. The only problem was putting in the right password. I did get another call from Hughesnet and a number to call back. When I talked to a rep she looked through case notes and said there was not much in the notes but like I said it is working for me. Hope they can get this going for you. There is one post from someone in the replies to my original post saying something about passing info to a rep. See if you can find that but that is all I can think of
It's still a no go for me, though I don't use the site. Still does the same thing as before, giving me a "This site can't be reached" message.
I still (1/13/18) can't access treasurydirect.gov either. Doesn't matter whether acceleration is disabled or not. This sort of thing happened one day even with amazon.com (same message), but only on the MS Edge browser; worked with Explorer. The next day it worked with both.
Have the several people who say they cannot access treasurydirect called Hughes and started trouble tickets or just assuming somebody is working on their problems? They might not be.
Glad you could finally get in. I'm still waiting for Hughes to respond to my request. I can access the site with my laptop using a different ISP. Cannot access it with my laptop using Hughes.