On 2023-04-21 13:42, Carlos E. R. wrote:
Someone in the forum published the actual manual:
<https://comunidad.movistar.es/t5/Soporte-Fibra-y-ADSL/Manual-completo-del-MitraStar-GPT-2541GNAC/td-p/3515196> → <https://dl.dropboxusercontent.com/s/bus4tdsp4xz3592/MitraStar%20GPT-2541GNAC%20Users%20Manual.pdf>
Which is a draft in English. This manual does match.
I see it does support Unique Local Addresses (ULA), according to page 53. This will allow you to use the IPv6 equivalent of RFC 1918 addresses. You can then configure your DNS server to provide ULA addresses, instead of relying on a changing prefix. I didn't notice a DNS server in it, but it appears you can say what server to use, so you could create one in Linux and point to it. You'd configure a DNS forwarder on a Linux box.