How to override the wonky DNS

[brightxy]

Hello all,

I've been constantly suffering the wonky DNS service that Xfinity provides, especially during this special pendamic situation. At random time of the day I can only connect to a handful of websites including Google and Youtube, which I conclude to be a DNS issue

Here's what I've tried to fix this:

1. I have my own modem/router (NetGear C3700-100NAS), I tried to set DNS in its setting to Google DNS (8.8.8.8, 8.8.4.4)

2. I have also tried to force DNS in my PC's network setting

However both way when I do nslookup, it still shows Default Server cdns01.comcast.net

Appretiate any suggestion/thoughts, thank you in advance.

[EG]

You can't if you are using a Comcast supplied gateway device. You can't even override it in the individual network client devices because their gateways no longer act as DNS forwarders /relays.

[brightxy · Accepted solution]

Thank you for replying, but as mentioned I'm using my own modem. I was finally able to identify the reason, the default DNS that was preventing me from using Google DNS was the IPv6 DNS, swaped it to Google IPv6 (2001:4860:4860::8888 and/or 2001:4860:4860::8844.) and now it is showing Google everywhere

[EG]

Glad you got it figured out. Thread now being closed.