Getting Bombed With DDos Attacks

Thanks.  As FURRYe38​ pointed out, it is not Norton that is detecting these "attacks".    Netgear routers do not accept connection attempts unless the owner has specifically defined ports to "forward" to specific devices on the local network.

The CAX30 has a feature that can make entries in the router log file when its software "detects" what it considers to be an "attack".  On my RBR50 there is an option:

This option controls whether these events are recorded in the log.  (It does not affect whether the router accepts connections or not).

Several users have posted recently that when they replace an older "R-series" Netgear router with a newer model, the log suddenly started filling up with these "attacks".  The simple fact is that any device connected to the internet will attract connection attempts.  They cannot be stopped.  (Just as a mailbox will receive "junk mail" and a telephone will receive marketing calls.)  The R7000 did not fill up the log file with these reports, and the CAX30 does.  Your choice is whether to look at them or not.