• For VPN connections from a network device (smartphone, tablet, computer) to the FRITZ!Box, the FRITZ!Box must have a public IPv4 address at the internet gateway.
• For VPN connections between two FRITZ!Box home networks, at least one of the FRITZ!Boxes must have a public IPv4 address at the internet gateway.

The public IPv4 address is assigned to the internet gateway of the FRITZ!Box by the internet service provider.

Checking the IPv4 Address of the Internet Gateway of the FRITZ!Box

Check whether the IPv4 address of the internet gateway of the FRITZ!Box is a private or a public IPv4 address.

Determine the public IPv4 address of the FRITZ!Box: Determining the Public IPv4 Address of the FRITZ!Box