IPv6 doesn't allow you to easily get a new completely random address. You get a subnet allocated by your ISP, and you can use any address within that subnet. Rather than blocking a single IPv6 address, a service like Cloudflare can just block the entire IPv6 subnet prefix and get the same result as blocking an IPv4 address.
IPv6 doesn't allow you to easily get a new completely random address. You get a subnet allocated by your ISP, and you can use any address within that subnet. Rather than blocking a single IPv6 address, a service like Cloudflare can just block the entire IPv6 subnet prefix and get the same result as blocking an IPv4 address.