Raspbian IPv6 Internet-provider address issue

Job ID: 31245761

Budget: €30 – €250 EUR

I have a Raspberry Pi running Raspbian Buster. It functions as a gateway. A Huwaei e3372h-320 dongle is used for Internet connection. The RPi internal wifi module is setup as a WAP.

Since a few weeks, the internet provider (4g provider) does only provide a IPv6 address and no longer a IPv4 address. The Raspberry is only configured for IPv4 (external address). So I currently can't connect to internet (the name is resolved, but I receive a 'destination net unreachable').

This should be fixed by changing the configuration files. The changes should be explained in the configuration files (add remarks)

I can deliver the configuration files, and I can give (teamviewer) access to the RPi which has the dongle installed.