I have been getting "Error 101 (net::ERR_CONNECTION_RESET): Unknown error." while trying to connecting to the Torrent server appliance. Web-GMUI and shell access working fine.
Tried everything, NAT, Firewall changes. couldn't figure out what the problem was.
Solution turned out to be simple. Use FireFox. I was using Chrome and IE, both gave me connection errors. With FireFox, it worked in an instant.
Spent 2 days figuring out the solution.. Hope this helps some poor soul.