Cisco Systems WRVS4400NRF manual Setting Up and Configuring the WRVS4400N Wireless-N Router

Setting Up and Configuring the WRVS4400N Wireless-N Router	5
Setting Up Your Wireless-N Router

•6to4 Tunnel—Allows your IPv6 network to connect to other IPv6 networks via tunnels through IPv4 (per RFC3056). The remote router also needs to support 6to4. Because the tunnel can be automatically formed based on traffic, there is no limit as to how many tunnels you can have.

•6 to 4 Gateway Access Control—By default, this route allows 6to4 connections to or from any other 6to4 gateway. By enabling this Access Control, you can have a better control which IPv6 clouds this router is connecting to. A list of IP addresses can be entered in the Access List. Those should be the IPv4 addresses of the remote 6to4 gateways.

-Permit following sites—Allow only a limited set of 6to4 gateways to establish tunnel with the router. Up to 20 sites can be configured and they can send traffic simultaneously.

Cisco WRVS4400N Wireless-N Gigabit Security Router with VPN Administration Guide 65