NAT64服务的用法，修改/etc/resolv.conf，设置DNS为这个服务器，格式为nameserver 2001:67c:2b0::4一行一个。
使用之前请备份/etc/resolv.conf，命令cp /etc/resolv.conf /etc/resolv.conf.bak
芬兰服务器：
2001:67c:2b0::4 2001:67c:2b0::6
来源：https://www.trex.fi/2011/dns64.html
一键命令echo -e "nameserver 2001:67c:2b0::4\nnameserver 2001:67c:2b0::6" > /etc/resolv.conf
德国服务器：
2a01:4f8:c2c:123f::1 2a00:1098:2c::1 2a01:4f9:c010:3f02::1
来源：https://nat64.net/
一键命令echo -e "nameserver 2a01:4f8:c2c:123f::1\nnameserver 2a00:1098:2c::1\nnameserver 2a01:4f9:c010:3f02::1" > /etc/resolv.conf
