How to fully disable IPv6 on NH20T

[Caboose]

I received my new NH20T and 'Wifi 6 Booster' today. While this is a nice big upgrade from the old Actiontech I had before, there is one issue I'm trying to resolve.

I have a PiHole on my network which has worked amazingly up until today. While I do have DNS set for my LAN, I still seem to be getting an IPv6 address on my devices, including DNS6.

IPv6 is 'off' in the 'Local Network' section.

Yet on my PCs, I'm seeing IPv6 addresses. This is from my laptop running Linux Mint, but my Windows 11 desktop and even my Pixel 8 show similar things (Don't worry about the speed or security on the laptop, it's an older notebook).

How do I fully disable IPv6? This defeats the purpose of my PiHole as all my devices end up using the DNS6 address. If possible, I'd like to avoid using the PiHole as my DHCP server as well.

[Caboose]

Seems I can't edit the main post.

On the NH20T dashboard, I see this for IPv6.

This tells me that IPv6 is still enabled. So far I've been searching all over but have yet to find out how to fully disable IPv6 for my LAN. It's already disabled on the WAN side.

[El-Eric]

@Nighthawk @FuzzyLogic - Calling on you guys to see if there's a missing step before I send this off to our technical support team

[FuzzyLogic]

It looks to me that whatever 10.1.1.4 may be supplying the IPV6 address.

[Caboose]

The PiHole is setup as only DNS, and IPv6 is not enabled. DHCP is also disabled on the PiHole (as having 2 DHCP servers is a bad time).

This was not an issue on the previous TELUS modem/router, this was not an issue on the Linksys Velop 6e Pro or TPLink Deco x75 Pro I had used previously.

[ydesai]

Any update on this? I use personal AdGuard server as my DNS. Almost all my devices pick up my server IPV4 as DNS which is set on the Telus NH20T modem with all IPV6 options disabled. For some reason, IPV6 is still shows on my Pixel phone. I can't figure out why my Pixel device sets some random ipv6%wlan0 as primary dns and my adguard server ipv4 as a secondary dns. Even my WiFi 6 booster shows my adguard server ipv4 as primary dns, but my pixel phone doesn't. Other devices like Macbook or iPhone sets correct adguard IPV4 as primary dns. Is this an android issue or Telus? Is Telus not completely disabling IPV6?

[Caboose]

Unfortunately no solution. Heck on my windows and Linux boxes, if I have IPv6 enabled, I still get dns6 addresses in addition to my pihole.

The "solution" that I received from support was simply disabling IPv6 in Windows.

Tbh this is a firmware issue and support needs to release an updated firmware that includes full control.