Bambu A1 mini still operates on 1.04 firmware which does not include authorization “security feature”. Naturally, I want to avoid it.
I know I can meddle with router somehow, even if it does not have parental controls or other very clear option to leave it inside local network.
However I would prefer preventing update in some other way, if there is any. This little printer is quite portable and I sometimes bring it to other locations. Also, remote printing and monitoring are nice features, which would be a pity to lose.
What would you suggest, or maybe have done yourselves?
Your router probably has a firewall you can set to just block all internet access to your printer’s IP. You’d have to make sure you let it access the home network if you want to send files remotely to it.
Alternatively, routers nowadays have a guest network. You may be able to disable internet access to the guest network and connect the printer to it. You would have to temporarily connect your host device to the guest network to send your files to print, which can be annoying.