What Could Go Wrong - ZyXEL Communications ZyWALL 110 Handbook

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Type ping -6 ipv6.google.com in a Command Prompt to test. You should get a
response.
Window 7 > cmd > ping -6 ipv6.google.com

What Could Go Wrong?

If your IPv6 connection is not working, please make sure you disable
Auto-Configuration on the LAN1 IPv6 interface. Enabling it will cause two default
routes, however, the ZyWALL/USG only needs a default route generated by your
relay router setting. Also, make sure you enable the WAN1 IPv4 interface. In 6to4,
the ZyWALL/USG uses the WAN1 IPv4 interface to forward your 6to4 packets over
the IPv4 network.
In Windows, some IPv6 related tunnels may be enabled by default such as Teredo
and 6to4 tunnels. It may cause your computer to handle IPv6 packets in an
unexpected way. It is recommended to disable those tunnels on your computer.
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