Solved! Solved: Go to Solution.
As a outside the box solution, I had a similar (non security related issue). I bought a cheap power timer (something like this) and set it to turn off the power the modem at 3am each day (you could do any time cycle you like). That way the system properly resets at least once a day if you are away.
I have recently changed address and re connected to Optus Cable. The equipment installed was a Netgear CM500V and a Sagecom 3864OP. I am not on NBN but have been advised it will be available shortly. My past set up I had a single modem which was connected to an Apple Time Machine and provided more than acceptable wifi performance. If not connected to the NBN why do I need the Sagecom now. May be sometime in the future? I am not really savy with modems/routers etc. How do I configure WIFI without Sagecom??