现在 ping/traceroute freeshell 的 IPv6 地址,可以反解析出域名了。

$ traceroute servmon.6.freeshell.ustc.edu.cn<br></br>traceroute to servmon.6.freeshell.ustc.edu.cn (2001:da8:d800:71::987), 30 hops max, 80 byte packets<br></br> 1 2001:da8:d800:f001::1 (2001:da8:d800:f001::1) 0.662 ms 0.778 ms 0.892 ms<br></br> 2 2001:da8:d800:ffff::4 (2001:da8:d800:ffff::4) 1.127 ms 1.181 ms 1.409 ms<br></br> 3 s7.freeshell.ustc.edu.cn (2001:da8:d800:71:1::7) 0.648 ms 0.619 ms 0.609 ms<br></br> 4 servmon.6.freeshell.ustc.edu.cn (2001:da8:d800:71::987) 0.722 ms 0.714 ms 0.705 ms<br></br>

这个功能的主要用途是确定 freeshell 某个 IPv6 地址的主机名,比如这样:

C:\Users\Bojie>tracert 2001:da8:d800:71::2081

Tracing route to wheezy.6.freeshell.ustc.edu.cn [2001:da8:d800:71::2081]
over a maximum of 30 hops:

1 2 ms 2 ms 5 ms 2001:da8:d800:f001:176:99:0:1
2 2 ms 4 ms 2 ms 2001:da8:d800:f001::1
3 3 ms 3 ms 2 ms 2001:da8:d800:ffff::4
4 3 ms 4 ms 3 ms 2001:da8:d800:70:202:38:70:5
5 2 ms 3 ms 3 ms wheezy.6.freeshell.ustc.edu.cn [2001:da8:d800:71::2081]

Trace complete.