Comcast is blocking the ability to change DNS entries even on customer owned devices. At least on the Arris Surfboard SVG2482AC. I bought one and in the same situations and am NOT happy about it.
I will look into this, I do believe this should work.. I am on vacation next week but I will email people on this.. Feel free to keep me honest here and ping me..
Just an FYI I have a ticket in place to get this corrected... The end user should have access to change the DNS server on the retail unit..
Same with me. I can not set the DNS servers to be used on a ARRIS SVG2482AC that I just purchased in March 2018.
I do not want to be forced to use COMCAST DNS servers where I have better ones that I want to use.
I know I could do DNS by manually setting it on each client, but that defeats the whole purpose of pushing the DNS server names down through DHCP.
In my case, I have Many client devices (around 100 devices) on my home network. I have the 400 Mbps plan for my Smart House.
So doing DNS manually is a messy idea for our IT environment. Just would like Xfinity / ARRIS to enable the DNS setting capability that is in the ARRIS firmware code, but its disabled. See screen capture below of what the DNS setting should look like....