services.usbguard.implicitPolicyTarget
NixOS option
How to treat USB devices that don’t match any rule in the policy. Target should be one of allow, block or reject (logically remove the device node from the system).
type: one of "allow", "block", "reject"Default
declared in: nixos/modules/services/security/usbguard.nixView source on NixOS/nixpkgs →"block"