Hi Martin, I am not sure why the Protectlink would prohibit the internet from working if the activation code was not present. If the IPS is disabled it shouldn't break the internet.
Anyway... one thing I had noticed on this router model over around the 10 years they've been around, they do have a tendancy to lose/drop settings due to power conditions. Have you had any environment changes lately? Storms knock down power? Change a power outlet or surgeprotector / UPS? If the device is regularly rebooting or regularly losing power, it comes as no surprise to me some settings are compromised and have to be reconfigured.
-Tom
Please mark answered for helpful posts
-Tom
Please mark answered for helpful posts
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