hi there, took me a while to get digibit vpn working, but managed after contacting digibit, after a few replies, the reply below worked for me, im using zgemma h2h and virgin superhub 3, Steve.
I am running a superhub3 myself buddy - Very strang, Although i have seen this recently so have a quick fix for you to test.
Press Menu setup system network device setup adapter settings turn DHCP to no green to save goto name servers press green to add.
In first nameserver put
8.8.8.8
In second put
4.4.4.4
Then press green to save wait for network to activate and for clock to count down
Exit out to TV press menu standby restart press ok on restart
Regards,
Matt
Founder of DigibitUK & DigibitVPN