@Tony_Garland Unfortunately I don’t have a solution for you. The previous version of N360 allowed entering a range of addresses using “-” but v24 won’t accept it. When v24 self-installed, I noticed that several of my traffic rules didn’t make it over so I created them manually and found I had to type each address separated by a comma. I didn’t have the daunting task you’re facing. Mine required about two dozen addresses but even that was still annoying.
I suggest reaching out to Norton’s support. @bjm provided instructions on contacting them in this thread Unable to download and install my Norton subscription - #7 by bjm
If they have a solution, I’d appreciate it if you would post it here.
I saw your other post about traffic rules. I read the instructions as you do regarding “ALL”. I am aware that with traffic rules (not program rules) the order of where the rule appears on the list is very important. Could that be a factor in your situation? Traffic rules are processed top to bottom. https://support.norton.com/sp/en/us/home/current/solutions/v1028031
Worst case scenario, if you can’t block traffic to a particular IP address using Norton, maybe consider using your router’s firewall? Of course, that affects everyone connecting via that router, so maybe that’s not a solution.
Good luck.