http://y5wnzw4e6i7srm2gqadlow5anhlaj5avdkzbwzbmrxwkygxdp7ffieqd.onion/blog/noticer-noticing-ipv6.html
IPv6 addresses usually are assigned under a prefix, so baning IPv6 addresses would probably start at /64 and eventually all the way up to /48 and probably even high if abuse from an IPv6 address prefix keeps coming. One thing I've realized is, due to the high amount of IP addresses assigned even to a /64, it is very easy to hide services such as SSH and other applications since automated scanners will have to scan BILLIONS of addresses.