Can't Change DNS Server Settings On Sky Hub
Unfortunately Sky does not allow to change DNS settings on Sky Hub. Sky decided to lock down Sky Hub!
You can change DNS settings on any device you are planning to use with Smart DNS Proxy.
Please find our HOW TO SETUP SMART DNS PROXY directions here.
Important
Roku does not have DNS settings section. In order to use Roku, you have to setup your router with Smart DNS Proxy.