v4 地址国外无法访问

[heroxbd]

$ ping ipv6.tsinghua.edu.cn
PING ipv6.tsinghua.edu.cn (166.111.9.164) 56(84) bytes of data.
From proton (192.168.7.52) icmp_seq=1 Destination Host Unreachable
From proton (192.168.7.52) icmp_seq=2 Destination Host Unreachable
From proton (192.168.7.52) icmp_seq=3 Destination Host Unreachable
^C
--- ipv6.tsinghua.edu.cn ping statistics ---
6 packets transmitted, 0 received, +3 errors, 100% packet loss, time 5030ms
pipe 3

[bigeagle]

yep，那个服务器 ipv4 没开校外连接