I’ve found great success using a hardened ssh config with a limited set of supported Cyphers/MACs/KexAlgorithms. Nothing ever gets far enough to even trigger fail2ban. Then of course it’s key only login from there.

Absolutely, it’s a fabulous engineering challenge, to make it work well on a hobbyist grade 3D printer with ordinary materials. Also a lesson in using the right tool for the right job (some parts are just better off milled or bought OtS)

I used to frequent the FOSSCAD IRC ages back as a teen. This started during the post-Liberator panic, there were talks about regulating 3D printers to not allow printing guns, etc. Designed a few things, never actually printed any of it myself, but some others did. Really got me into engineering before I exited the scene, led to actually pursuing an engineering career. Was surprised to see 3D printed gun videos so openly shared, it was pretty underground for ages there.