IPv4 Network of the FRITZ!Box

Both ends of a VPN connection must have IPv4 addresses in different IPv4 networks. Only then is VPN communication possible.

Note:Upon delivery, every FRITZ!Box uses the IPv4 network 192.168.178.0.

When both ends of the VPN network have a FRITZ!Box used for internet access, then at least one of the FRITZ!Boxes must have an IPv4 network different from the factory settings.

  • When using mobile devices, it is not predictable which device will be used to connect the internet. Any public wireless network may have a FRITZ!Box behind it. Change the IPv4 network of the FRITZ!Box when you configure VPN connections for network devices.
  • When you configure a VPN connection for two FRITZ!Box networks, then change the IPv4 network in each FRITZ!Box.

Changing the IPv4 Network in the FRITZ!Box