nixos/ntpd: Add hardening

2024-10-19 14:26:17 -04:00
parent 53bc9450bc
commit 4e632e9c3f
1 changed files with 26 additions and 0 deletions
@@ -156,6 +156,32 @@ in
        ExecStart = "@${ntp}/bin/ntpd ntpd -g ${builtins.toString ntpFlags}";
        Type = "forking";
        StateDirectory = "ntp";
+
+        # Hardening options
+        PrivateDevices = true;
+        PrivateIPC = true;
+        PrivateTmp = true;
+        ProtectClock = false;
+        ProtectHome = true;
+
+        ProtectHostname = true;
+        ProtectKernelLogs = true;
+        ProtectKernelModules = true;
+        ProtectKernelTunables = true;
+        ProtectSystem = true;
+
+        RestrictNamespaces = true;
+        RestrictRealtime = true;
+        LockPersonality = true;
+        MemoryDenyWriteExecute = true;
+        AmbientCapabilities = [
+          "CAP_SYS_TIME"
+        ];
+
+        ProtectControlGroups = true;
+        ProtectProc = "invisible";
+        ProcSubset = "pid";
+        RestrictSUIDSGID = true;
      };
    };