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SLAAC + RDNSS configured but the PPPoE-provided IPv6 DNS is still being propagated to devices

a week ago

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Registered: 2025-12-22

SLAAC + RDNSS configured but the PPPoE-provided IPv6 DNS is still being propagated to devices

a week ago

Model: Deco BE65

Hardware Version: V2

Firmware Version: 1.3.0 Build 26021212 Rel. 47291

My connection uses IPv4 and IPv6 over PPPoE and my ISP sets Google IPs as the default IPv6 DNS servers. I run Pi-hole on Proxmox at 192.168.68.111.

To avoid distributing an IPv6 DNS to clients, I configured IPv6 as SLAAC + RDNSS so clients still get IPv6 addresses, but not a DNSv6.

I also set DNS to point to my Pi-hole, but the BE65 still insists on advertising IPv6 DNS to clients, so they end up like this:

I want the BE65’s DHCP server to send only the Pi-hole’s IPv4 address to my clients. How should I configure it?

1 Reply

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Yesterday

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Registered: 2021-03-21

Re:SLAAC + RDNSS configured but the PPPoE-provided IPv6 DNS is still being propagated to devices

Yesterday

@rmnflrn That's how SLAAC+RDNSS works afaik. My connection is also the same (PPPoE for both, ISP uses Google DNS for ipv6)

To clarify, I've seen the ipv6 DNS to show up only on computers.

Why do you have the same ipv4 DNS as primary & secondary? The secondary should be a different one

Just a M4 (2-pack) user who regrets buying it