[PLUG] trying to find a cable modem / wifi combination which gives the user full control

[American Citizen]

Hello:

Xfinity is pushing me to abandon my current cable modem/wifi router 
combination and adopt one of the following:

Recommended Devices

ARRIS / Surfboard
S33 or SBG8300 or G36

Netgear
CBR750 or CAX30 or CAX80 or CM1100 or CM2000 or CM2050V

Hitron Technologies
CODA56

The last time I upgraded to a Netgear C6300 v2, I lost control over the 
IPV6 provisioning, and some critical DNS parameters in the setup. This 
basically meant my internet provider overruled any VPN I was trying to 
use and had full access to all the internet connections live.

Has anyone found a cable modem (up to 1.2 gigs/sec) and wifi combination 
which gives the user full control so VPN will work? In my case the DNS 
queries were intercepted then substituted. I can understand my internet 
provider wanting to know all secrets.. but I really want to do VPN.

Thank you for letting me know.

Randall