https://ipv6.he.net/
Paste the following into /etc/network/interfaces
auto he-ipv6
iface he-ipv6 inet6 v4tunnel
        address 2001:470:c:f28::2
        netmask 64
        endpoint 66.220.18.42
        local 23.234.251.249
        ttl 255
        gateway 2001:470:c:f28::1


$sudo /etc/init.d/networking restart

2001:470:c:f28::2

curl https://ipv6.ddnspod.com/


2001:470:c:f28::1/64

2001:470:c:f28::2/64
2001:470:c:f28::/66
2001:470:c:f28:4000::/66
2001:470:c:f28:8000::/66
2001:470:c:f28:c000::/66

Docker IPV6支持
# default-gateway-v6：自定义Docker默认网络中，容器中ipv6网络默认网关。
# 设置之后虽然容器内部的default route已经设置为fd00:db8:1::ffff
# 但是，docker0 bridge interface的ipv6地址仍然使用默认地址：fd00:db8:1::1
vi /etc/docker/daemon.json
{
  "ipv6": true,
  "fixed-cidr-v6": "fd00:db8:1::/64",
  "experimental": true,
  "ip6tables": true,
  "default-gateway-v6": "fd00:db8:1::ffff"
}