Blocking automatic firmware updates

The TV may nag you to update every time you start it or wake it from standby. To disable the update notifications to prevent accidental updates by you or your family members, I highly recommend blocking these domains in your router or firewall, then reboot your TV. Blocking these 6 domains has no other side effects; it just prevents firmware updates from being downloaded. You can still install the version you want with the USB update method. Block these domains in your router even if your TV is rooted (homebrew loads very late in the boot process, and the TV may have already resolved the update domains before homebrew can block them):