# SSH service configuration common to all hosts { config, pkgs, lib, ... }: { services.openssh = { enable = true; # Enable the OpenSSH daemon. permitRootLogin = "prohibit-password"; challengeResponseAuthentication = false; passwordAuthentication = false; openFirewall = true; hostKeys = [ { path = "/etc/ssh/ssh_host_ed25519_key"; type = "ed25519"; } ]; }; }