Same is true for me, although I use FiOS in an area that actually has IPv6 working. Is Comcast fully implemented everywhere?Same here, It should be set to native. Passthrough is a bridging mode to connect devices to IPv6. It comes with lots of disadvantages over a full native IPv6 implementation.
JohnD5000: Here is my setup with Comcast (I have my own SB6141 modem) I just set drop down to "native" (also ensure the firewall is tuned on under "Firewall") and IPv6 test fine with reliable connection.Any info on how to setup IPv6 with comcast/xfinity? Connection type ative, passthrough, etc? What about settings for DNS?
"NATIVE" along with all other default settings will permit you to setup/test IPv6 on comcast/xfinity. The additional recommendations above may come in handy, depending upon your needs. I don't recall needing to reboot, but you may need to afterwards to show your IPv6 address on the firmware page.Any info on how to setup IPv6 with comcast/xfinity? Connection type ative, passthrough, etc? What about settings for DNS?
I was set to Native but upon testing to respond to this thread it said no connectivity. I recently switched modems from a Motorola 8600 to Comcast's Technicolor CGM4140COM and now I'm wondering if that's the reason why. It's a gateway device but it is currently set in bridge mode and is connected to my RT-AC86U. The passthrough setting does give connectivity but I see from other posts here that that is not a desirable solution.Passthrough doesn't work for me...only native.
I noticed your from Mass. Where is Cloudfare data center? I'm also from Mass and currently using Quad9. Wondering if should switch to CF? ThanksThat's right.
- I am in a suburb of a city which has a Cloudflare data center. It is about 6 hops and 10 msec away. I am not paying a performance penalty outside of what is inherent to DNS over TLS, although more knowledgeable folks have stated that DNS performance would need to be very bad for you to notice.
Thanks, I'm still a little fuzzy on it. I've set "Connect to DNS server automatically" to disable and set up Quad9. Will the "Enable Router Advertisement" set to enable push the Comcast DNS or the Quad9 DNS? Or should I set it to disable to always use Quad9?It will push your router's IP in addition to user-specified DNS to all your devices. If you enable, it will use the routers own cache + user-specified DNS, or disable, and it will bypass the local cache and always go to the user-specified DNS. I always use yes, because I have a simple home network. Others use no because they are running specialized programs/scripts.
Be advised using IPv6 in passthrough is a bad idea. Passthrough does just that it passes right through with no active firewall so your v6 connections are wide open to the world. Be careful.