ZyXEL Communications ZyWALL USG100-Plus - 2.7.6 Set Up an IPv6-in-IPv4 Tunnel Video Example; 2.7.7 What Can Go Wrong?

Chapter 2 How to Set Up Your Network
ZyWALL USG100-PLUS User’s Guide
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2.7.6 Set Up an IPv6-in-IPv4 Tunnel Video Example
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2.7.7 What Can Go Wrong?
1 You don’t need to activate the WAN1 IPv6 interface but make sure you enable the WAN1 IPv4
interface. In IPv6-in-IPv4, the ZyWALL uses the WAN1 IPv4 interface to forward your 6to4 packets
to the IPv4 network.
2 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.