NixOS must enforce a delay of at least four seconds between login prompts following a failed login attempt.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-268171 | ANIX-00-001870 | SV-268171r1039583_rule | Medium |
| Description |
| Limiting the number of login attempts over a certain time interval reduces the chances that an unauthorized user may gain access to an account. |
| STIG | Date |
| Anduril NixOS Security Technical Implementation Guide | 2024-10-25 |
Details
| Check Text (C-72095r1039581_chk) |
| Verify the NixOS operating system enforces a four-second delay between login attempts with the following command: $ grep -I delay /etc/login.defs FAIL_DELAY 4 If "FAIL_DELAY" is not set to "4" or greater, is commented out, or is missing, this is a finding. |
| Fix Text (F-71998r1039582_fix) |
| Configure NixOS operating system to enforce a four-second delay between login attempts. Add the following Nix code to the NixOS Configuration usually located in /etc/nixos/configuration.nix environment.etc."login.defs".text = pkgs.lib.mkForce '' FAIL_DELAY 4 ''; Rebuild the system with the following command: $ sudo nixos-rebuild switch |