The FRITZ!Box can establish VPN connections (IPSec, WireGuard) over both IPv4 and IPv6. This means that VPN connections can also be established if the FRITZ!Box is operated on an internet connection with Dual-Stack Lite (DS-Lite).

However, the FRITZ!Box can only transmit IPv4 data within the VPN tunnel. It is not possible to access IPv6 internet services or devices in the remote network over the VPN connection if they are only available via IPv6. We are working on a solution and will also transmit IPv6 data within the VPN tunnel with WireGuard connections in a future FRITZ!OS update.