We prefer the term "Legacy IP." | http://howtodisableipv6.com/ | "basically, allow all ICMP6 and you'll be fine." otherwise RFC4890 | Pastebin: https://p.6core.net/ (Don't redact addresses!) | Tunnels: https://tinyurl.com/v6brokers | IPv4/6 Indicator, Firefox: https://tinyurl.com/ffIPvFox - Chrome: https://tinyurl.com/ChIPvFoo