Thank you Jeffrey!
Meanwhile I have solved this with my ISP, because they offer a free DDNS service. This way I was able to create my own DDNS and it works great!
Thank you Colin!
I have tryed the second solution...but the IP is still with 100 in the begining.
I will try the first one.
Thank you very much for your support!
I have an Asus RT-AC68U and everything was fine until a few months ago. At some point at the end of 2020 the router had some strange behaviour because it was ok 2 or 3 days and after that my wireless networks were unavailable until I have restarted the router.
Now things seems ok with the last...