my client IP 192.168.0.97 Pihole sits on 192.168.0.18 Router 192.168.0.9 DHCP running off the router range 200-254. WAN DNS setting on Asus RT-AC66U-B1 set to Connect to DNS Server automatically. Lan --> DHCP Server --> DNS Server set to 192.168.0.18 (Piholes IP). On the pihole running on RPI --> Settings --> DNS --> upstream DNS: Google (ECS) all 4 check boxes to the right are selected. listen on all interfaces is on. Advanced DNS Never Forward non -FQDN's and **Never forward reverse lookups for private IP ranges are both checked. Use DNSSEC is unchecked. Conditional forwarding is checked 192.168.0.0/24 IP address of your DHCP server (router) 192.168.0.9 local domain name: landsend. In network overview I see all clients are connecting to the pihole.
Is it normal not to get the "cant find Pihole" message?
Not sure how do I do that? .
Under Advanced IPV6 if I disable Connection Type then all IP6 traffic is blocked and I https://test-ipv6.com reports :
No IPv6 address detected
When a publisher offers both IPv4 and IPv6, your browser appears to be happy to take the IPv4 site without delay.
Connections to IPv6-only sites are timing out. Any web site that is IPv6 only, will appear to be down to you.
I think I found a way: Under Advanced IPV6 if I selected Passthrough Connection Type and IPv6 DNS Setting --> Connect to DNS Server automatically - Disable. IPv6 DNS Server 1 - Picked up the IPV6 off the Pihole Settings System page. Hopefully this is correct and helps someone in the future. Thanks
(I've moved your posts to a separate topic, so you can mark it as solved.)
To that end, it may help to know the firmware you used on your Asus RT-AC66U-B1 (version number and also stock vs. custom (e.g. Merlin) as applicable).