How about to set up a device that works locally at your friends’ house as DNS server, but don’t forget to install something like zerotier, so you can access it without setting up a port forward. With that, you can help them with the maintenance of their DNS server.
Waduh baru post berita dari tribun, tapi didalam itu juga ada dari kompas, masalah kecelakaan kereta api. Mudah mudahan tidak menjadi masalah.