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+.. _mod-noudp:
+
+``noudp`` — No UDP response
+===========================
+
+The module sends empty truncated reply to a query over UDP. Replies over TCP
+are not affected.
+
+Example
+-------
+
+To enable this module for all configured zones and every UDP reply::
+
+    template:
+      - id: default
+        global-module: mod-noudp
+
+Or with specified UDP allow rate::
+
+    mod-noudp:
+      - id: sometimes
+        udp-allow-rate: 1000  # Don't truncate every 1000th UDP reply
+
+    template:
+      - id: default
+        module: mod-noudp/sometimes
+
+Module reference
+----------------
+
+::
+
+  mod-noudp:
+   - id: STR
+     udp-allow-rate: INT
+     udp-truncate-rate: INT
+
+.. NOTE::
+   Both *udp-allow-rate* and *udp-truncate-rate* cannot be specified together.
+
+.. _mod-noudp_udp-allow-rate:
+
+udp-allow-rate
+..............
+
+Specifies frequency of UDP replies that are not truncated. A non-zero value means
+that every N\ :sup:`th` UDP reply is not truncated.
+
+.. NOTE::
+   The rate value is associated with one UDP worker. If more UDP workers are
+   configured, the specified value may not be obvious to clients.
+
+*Default:* not set
+
+.. _mod-noudp_udp-truncate-rate:
+
+udp-truncate-rate
+.................
+
+Specifies frequency of UDP replies that are truncated (opposite of
+:ref:`udp-allow-rate <mod-noudp_udp-allow-rate>`). A non-zero value means that
+every N\ :sup:`th` UDP reply is truncated.
+
+.. NOTE::
+   The rate value is associated with one UDP worker. If more UDP workers are
+   configured, the specified value may not be obvious to clients.
+
+*Default:* ``1``