nixos/uptime-kuma: Add additional lockdown settings to systemd unit (NixOS#361452)

Author: JulienMalka

nixos/modules/services/monitoring/uptime-kuma.nix

@@ -51,21 +51,30 @@ in
         DynamicUser = true;
         ExecStart = "${cfg.package}/bin/uptime-kuma-server";
         Restart = "on-failure";
-        ProtectHome = true;
-        ProtectSystem = "strict";
-        PrivateTmp = true;
+        AmbientCapabilities = "";
+        CapabilityBoundingSet = "";
+        LockPersonality = true;
+        MemoryDenyWriteExecute = false; # enabling it breaks execution
+        NoNewPrivileges = true;
         PrivateDevices = true;
-        ProtectHostname = true;
+        PrivateMounts = true;
+        PrivateTmp = true;
         ProtectClock = true;
-        ProtectKernelTunables = true;
-        ProtectKernelModules = true;
-        ProtectKernelLogs = true;
         ProtectControlGroups = true;
-        NoNewPrivileges = true;
+        ProtectHome = true;
+        ProtectHostname = true;
+        ProtectKernelLogs = true;
+        ProtectKernelModules = true;
+        ProtectKernelTunables = true;
+        ProtectProc = "noaccess";
+        ProtectSystem = "strict";
+        RemoveIPC = true;
+        RestrictAddressFamilies = [ "AF_INET" "AF_INET6" "AF_UNIX" "AF_NETLINK" ];
+        RestrictNamespaces = true;
         RestrictRealtime = true;
         RestrictSUIDSGID = true;
-        RemoveIPC = true;
-        PrivateMounts = true;
+        SystemCallArchitectures = "native";
+        UMask = 027;
       };
     };
   };