添加TunnelBroker隧道提供IPv6访问

1、登录https://www.tunnelbroker.net/register.php 注册，然后在邮件里认证。

2、Create Regular Tunnel
IPv4 Endpoint (Your side):填写你的ipv4。
注意服务器不要禁ping否则会报错：
IP is not ICMP pingable. Please make sure ICMP is not blocked.
If you are blocking ICMP, please allow 66.220.2.74 through your firewall.

3、隧道服务器，默认选择 Los Angeles, CA, US

4、点击Create Tunnel
可以看到自己刚才输入的ipv4及ipv6。

5、点击Example Configurations，查看OS配置示例

6、vps配置——Ubuntu添加一个ipv6的interfaces
Paste the following into /etc/network/interfaces:

auto he-ipv6
iface he-ipv6 inet6 v4tunnel
        address 2001:470:1f06:208::2
        netmask 64
        endpoint 209.51.161.14
        local 23.94.7.124
        ttl 255
        gateway 2001:470:1f06:208::1

重启networking

service networking restart

测试ipv6

ping6 google.com