diff --git a/doc/manual/default_network_ports.rst b/doc/manual/default_network_ports.rst
index 10b54cf23..c5728e428 100644
--- a/doc/manual/default_network_ports.rst
+++ b/doc/manual/default_network_ports.rst
@@ -4,7 +4,9 @@ Default network ports
 +--------------------------+--------------+
 | Component                | Default port |
 +==========================+==============+
-| Core device              | 1381         |
+| Core device (main)       | 1381         |
++--------------------------+--------------+
+| Core device (mon/inj)    | 3250 (UDP)   |
 +--------------------------+--------------+
 | Master (notifications)   | 3250         |
 +--------------------------+--------------+