diff --git a/source/_integrations/switcher_kis.markdown b/source/_integrations/switcher_kis.markdown
index d0a0b607232..8c8c783e371 100644
--- a/source/_integrations/switcher_kis.markdown
+++ b/source/_integrations/switcher_kis.markdown
@@ -62,3 +62,7 @@ Note: This does not affect the auto off timer.
 | ------------- | --------- | -------------------------------------------------------------------------------------- | -------------------------- |
 | `entity_id`   | Yes       | Name of the entity id associated with the integration, used for permission validation  | switch.switcher_kis_boiler |
 | `timer_minutes`    | Yes       | Integer containing timer minutes (valid range 1 to 150)                                      | 90                    |
+
+## Notes
+
+If Home Assistant and your Switcher are not on the same network, you need to create a firewall rule, which allows a connection on port 20002 with the UDP protocol from Switcher to your Home Assistant and port 9957 with the TCP protocol from Home Assistant to your Switcher.