pfSense sending out rdnss advertisement when not DHCP server...why?
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Hi. I am using PiHole to do DHCP in my LAN. I only want clients to interact with PiHole via IPv4 (my LAN is dual stacked). In pfSense in the general settings, I initially provided both the IPv4 and IPv6 addresses of the PiHole as DNS servers. I have since deleted the IPv6 address but it still gets sent to the clients. I initially thought it was PiHole doing this but using radvdump I can see that RDNSS advertisements are coming from pfSense. I don't know which setting to change to stop pfSense sending this out. Any help?
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Worked it out. I had put the address in myself in Services > DHCPv6 Server/RA. Yes, I am a moron.
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Do you have IPv6 on the LAN? If so, you would have router advertisements, which can be configured to include RDNSS. If you're using DHCPv6, then you don't need RDNSS. However, I'd recommend against DHCPv6, unless you need it, as Android device don't support it. You can thank some genius at Google for that.
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@jknott Hi, yes, LAN is dual stacked. I just want all clients to get an IPv4 DNS address and no IPv6 address as I am using PiHole and DNS requests made via IPv6 make it difficult to identify clients. I have switched off "Provide DNS configuration via radvd" and that has solved the problem.
