6to4

Note: Connections through a 6to4 tunnel work with relays that are selected by the IPv4 Internet provider's backbone. The device administrator has no influence on relay selection. Furthermore, the selected relay can change without the administrator knowing about it. For this reason, connections via a 6to4 tunnels are suitable for test purposes only. In particular, avoid using 6to4-tunnel data connections for productive systems or for the transmission of confidential data.