Hughesnet does not officially support VPN connectivity...
http://support.hughesnet.com/support-articles/can-i-run-vpn-over-hughesnet
I've used VPN with HN and haven't had issues. I guess it may be just luck, and this may be why VPN is not supported, and why "HughesNet Technical Support does not provide help with configuring or troubleshooting problems associated with VPN clients."
ETA: it worked better with Gen 4, btw.
It depends on the type of and individual implementation of VPN. If you could be more specific we may be able to ffer advice.
Most SSL-VPN's should work fine. (My Sonicwall SSL-VPN's work).
Most ipsec VPN's will not work as the high latency has a ghreater effect. (Sonicwall Globall VPN Client/Site to Site Tunnels will not work)
Following. Not only does my VPN lock up, but overall connectivity is unacceptable. I have rasied this through tech support and waiting on the "engineers" to call me back. I've also reached to Liz the moderator. But would like to see other people's responses and if you had resolution to this issue.