What Could Go Wrong - ZyXEL Communications ZyWALL 110 Handbook

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Use the ping -6 [IPv6 IP address] command in a Command Prompt to test whether
you can ping a computer behind ZyWALL/USG_Y. You should get a response.
Window 7 > cmd > ping -6 2001:b020:0:71::46

What Could Go Wrong?

If your IPv6 connection is not working, please make sure you enable the WAN1 IPv4
interface. In IPv6-in-IPv4, the ZyWALL/USG uses the WAN1 IPv4 interface to forward
your 6to4 packets to 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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