diff --git a/doc/OpenWRT/OpenWRT-qmi-setup.md b/doc/OpenWRT/OpenWRT-qmi-setup.md
index e544701..e4e6e32 100644
--- a/doc/OpenWRT/OpenWRT-qmi-setup.md
+++ b/doc/OpenWRT/OpenWRT-qmi-setup.md
@@ -26,6 +26,7 @@ Go to "Interfaces"
 Click on "Add"
 Select "Protocol" -> "QMI Cellular"
 Add "Device" -> "wwan0" or "/dev/cdc-wmd0"
+Set "Firewall Settings" to "wan"
 
 ### For Aldi Talk only
 APN = "internet.eplus.de"