Hello, I used the access control range feature to disable all dynamic connections, while setting permitted devices as static connections. This worked but since then my router admin page got updated and that feature was removed. To fix another problem, I had to factory reset my router and it deleted the saved access control rule, which I cannot remake anymore with this new UI (it's something like a 2023 UI version). I would like to revert the software on the router to a 2021 version (or make a range rule with the new UI, which seems impossible with only the minimalistic "select devices" capability). How can I do so?
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