Hello,
I hope you are well.
I have a /56 IPv6 pool leased from the ISP. I advertise it statelessly to my LAN clients and everything works alright.
However, for a few clients, I need to prevent them from receiving IPv6 addresses so that they only use IPv4. I know MAC and IPv4 addresses of these clients if it helps. I can send them DHCPv4 options (but I doubt it's relevant for IPv6). I cannot disable IPv6 on the clients, I need to prevent router from advertising them and only them IPv6.
Is there a way to achieve this? How do I do it?
As far as I understand, there is no built-in functionality to do what I want and advertisement is done through multicast. So I assume /ipv6 firewall filter add is my friend. So I guess my question comes down to
1. is this at all possible?
2. what exact addresses-ports should I block in /ipv6 firewall filter?
Thanks in advance!