On 2023-04-28 16:33, Carlos E. R. wrote:

His problem is with his firewall, not IPv6. I use pfSense and I can set up an excellent firewall for 1 /64 or 256.

And my ISP giving dynamic prefixes, which prevents many of the possible IPv6 uses.

That's only a problem if you want to reach your network from outside. Otherwise, Unique Local Addresses will work for local access.