Honestly i dont know, its a just a little lab i use to mess with vm, test distros and learn some computer science.
Was messing lately with networking and remote acces over internet, i know my internet provider box logs report lost of failed connect every day, guess i miss configured on of the wm and it ended up beeing an entry point.
Well, i'm not mad, as i said it for learning purpose, today i learnt about libhide.so (well im still a bit confused cause all documentation i found was about proxmox v7, guess its also possible on proxmox v9)