我通过 Hurricane Electric 隧道建立了 IPv6 连接。自今年 IPv6 日以来，许多服务（google.com、facebook.com 等）在其主要域上启用了 IPv6。在我的 Windows 机器上，IPv6 优于 IPv4。这意味着每当我访问 Google 时，所有流量都会通过我的隧道到达 Hurricane Electric，这使延迟增加了 100% 以上：
C:\> ping www.google.com
Pinging www.l.google.com [2001:4860:8005::68] with 32 bytes of data:
Reply from 2001:4860:8005::68: time=85ms
Reply from 2001:4860:8005::68: time=84ms
Reply from 2001:4860:8005::68: time=112ms
Reply from 2001:4860:8005::68: time=86ms
Ping statistics for 2001:4860:8005::68:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 84ms, Maximum = 112ms, Average = 91ms
C:\> ping …