Technology
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Ideally, almost no devices should be connected to the internet. Things like 3D printers, TVs with microphones/cameras, etc should be in a DMZ and have outgoing-only access to a restricted set of services.
If you're running anything close to a professional operation, set up your site professionally. For home users, I recommend sticking with SD cards, it's only mildly more annoying for the frequency of printing you're likely to do.
Octoprint is great, connecting the printer to somebody else's computer is crazy
Yup. I'd still put it behind a VPN though, just because of the inherent dangers in starting a 3D print job remotely.
I agree, using a VPN is generally a good idea (if the alternative is exposing it to the web directly).
I have an nginx reverse proxy with http auth, myself. It's such battle tested software that I trust it fully
For anyone doing similar: battle tested software is still fallible, and exploits could emerge at any point (same goes for VPNs). Be sure to set
server_tokenstooff, this prevents NGINX from revealing it's version to the world, which will help protect you in case an exploit is discovered down the line.That's a good tip. Also: have your servers auto-update weekly. You will forget.