NETGEAR FVS318N manual Configure 6to4 Automatic Tunneling

ProSafe Wireless-N 8-Port Gigabit VPN Firewall FVS318N

Configure 6to4 Automatic Tunneling

If your network is an isolated IPv6 network that is not connected to an IPv6 ISP, you need to make sure that the IPv6 packets can travel over the IPv4 Internet backbone by enabling automatic 6to4 tunneling.

6to4 is a WAN tunnel mechanism for automatic tunneling of IPv6 traffic between a device with an IPv6 address and a device with an IPv4 address, or the other way around. 6to4 tunneling is used to transfer IPv6 traffic between LAN IPv6 hosts and WAN IPv6 networks over the IPv4 network.

With 6to4 tunnels, IPv6 packets are embedded within the IPv4 packet and then transported over the IPv4 network. You do not need to specify remote tunnel endpoints, which are automatically determined by relay routers on the Internet. You cannot use 6to4 tunnels for traffic between IPv4-only devices and IPv6-only devices.

Note: If the wireless VPN firewall functions as the endpoint for 6to4 tunnels in your network, make sure that the wireless VPN firewall

has a static IPv4 address (see Manually Configure an IPv4 Internet

Connection on page 31). A dynamic IPv4 address can cause routing problems on the 6to4 tunnels.

Note: If you do not use a stateful DHCPv6 server in your LAN, you need to configure the Router Advertisement Daemon (RADVD), and set up 6to4 advertisement prefixes for 6to4 tunneling to function correctly. For more information, see Manage the IPv6 LAN on page 73.

Typically, 6to4 tunnel addresses start with a 2002 prefix (decimal notification). On the wireless VPN firewall, a 6to4 tunnel is indicated by sit0-WAN1 (see View the Tunnel Status and IPv6 Addresses on page 49).

To enable 6to4 automatic tunneling:

1. Select Network Configuration > WAN Settings > 6 to 4 Tunneling.

Figure 24.

IPv4 and IPv6 Internet and Broadband Settings

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