init

modules/security.nix

@@ -0,0 +1,70 @@
+{ config, lib, options, pkgs, ... }:
+
+with lib;
+let
+  cfg = config.modules.security;
+in {
+  options.modules.security = {
+    useDoas = mkEnableOption "use opendoas instead of sudo";
+  };
+
+  config = mkIf cfg.enable {
+	boot = {
+		tmp.useTmpfs = lib.mkDefault true;
+		tmp.cleanOnBoot = lib.mkDefault (!config.boot.tmp.useTmpfs);
+		
+    	kernel.sysctl = {
+    	  # magic sysrq key, allows low-level commands through keyboard input
+      	  "kernel.sysrq" = 0;
+
+          ## TCP hardening
+          # prevent bogus ICMP errors from filling up logs
+          "net.ipv4.icmp_ignore_bogus_error_responses" = 1;
+          # do not accept IP source packets (we are not a router)
+          "net.ipv4.conf.all.accept_source_route" = 0;
+          "net.ipv6.conf.all.accept_source_route" = 0;
+          # don't send ICMP redirects (again, we're not a router)
+          "net.ipv4.conf.all.send_redirects" = 0;
+          "net.ipv4.conf.default.send_redirects" = 0;
+          # refuse ICMP redirects (MITM mitigations)
+          "net.ipv4.conf.all.accept_redirects" = 0;
+          "net.ipv4.conf.default.accept_redirects" = 0;
+          "net.ipv4.conf.all.secure_redirects" = 0;
+          "net.ipv4.conf.default.secure_redirects" = 0;
+          "net.ipv6.conf.all.accept_redirects" = 0;
+          "net.ipv6.conf.default.accept_redirects" = 0;
+          # protects against SYN flood attacks
+          "net.ipv4.tcp_syncookies" = 1;
+          # incomplete protection against TIME-WAIT assassination
+          "net.ipv4.tcp_rfc1337" = 1;
+
+          ## TCP optimization
+          # TCP fastopen
+          "net.ipv4.tcp_fastopen" = 3;
+          # bufferbloat mitigations + improvement in throughput and latency
+          "net.ipv4.tcp_conjestion_control" = "bbr";
+          "net.core.default_qdisc" = "cake";
+        };
+        kernelModules = [ "tcp_bbr" ];
+      };
+
+      security = {
+        # prevents replacing the kernel without a reboot
+      	protectKernelImage = true;
+      	# rtkit allows unprivileged processes to use realtime scheduling
+        # polkit allows unprivileged processes to speak to privileged processes (ex. nmtui, reboot)
+      	rtkit.enable = true;
+        polkit.enable = true;
+      };
+
+      # personal computer? no firewall ty :3
+      networking.firewall.enable = false;
+    } // (mkIf cfg.useDoas {
+    	security.sudo.enable = false;
+    	security.doas.enable = true;
+    	security.doas.extraRules = [
+    	  { users = [ config.user.name ]; noPass = true; persist = false; keepEnv = true; }
+    	];
+    	environment.systemPackages = with pkgs; [ doas-sudo-shim ];
+    });
+}

modules/user.nix

@@ -0,0 +1,29 @@
+{ config, pkgs, lib, options, ... }:
+
+with lib;
+with lib.my;
+{
+  options =  {
+    user = mkOpt types.attrs {};
+  };
+
+  config = {
+  	user = rec {
+  	  name = "reidlab";
+  	  description = "awesome guy";
+  	  extraGroups = ["wheel" "input" "audio" "video" "storage"];
+  	  isNormalUser = true;
+  	  home = "/home/${name}";
+  	  group = name;
+  	  uid = 1000;
+  	};
+  	users.groups.${config.user.group} = {};
+
+  	users.users.${config.user.name} = mkAliasDefinitions options.user;
+
+  	home-manager.useUserPackages = true;
+
+  	hm.home.username = config.user.name;
+  	hm.home.homeDirectory = lib.mkForce config.user.home;
+  };
+}

modules/xdg.nix

@@ -0,0 +1,19 @@
+{ ... }:
+{
+  config = {
+  	hm.xdg.enable = true;
+  	hm.xdg.userDirs = {
+  	  enable = true;
+  	  createDirectories = true;
+
+  	  desktop = "$HOME/desktop";
+  	  documents = "$HOME/documents";
+  	  download = "$HOME/downloads";
+  	  music = "$HOME/music";
+  	  pictures = "$HOME/pictures";
+  	  publicShare = "$HOME/public";
+  	  templates = "$HOME/templates";
+  	  videos = "$HOME/videos";
+  	};
+  };
+}