What server to block?

Hello,
to prevent the firmware from updating, I have blocked access to following servers:

fuk01.ps4.update.playstation.net
duk01.ps4.update.playstation.net
us01.ps4.update.playstation.net
al02.cdn.update.playstation.net
01.cdn.update.playstation.org.edgesuite.net
playstation.sony.akadns.net
a192.d.akamai.net

but in this case I cannot access to the PlayStation network and play Fortnite.

Can anyone please advise what ones to block just to prevent firmware updates?

Thanks,
Dan