diff --git a/common_components/modem_sim/sdkconfig.defaults b/common_components/modem_sim/sdkconfig.defaults
index 9c95f9c66..72e601622 100644
--- a/common_components/modem_sim/sdkconfig.defaults
+++ b/common_components/modem_sim/sdkconfig.defaults
@@ -75,3 +75,5 @@ CONFIG_AT_HTTP_COMMAND_SUPPORT=y
 CONFIG_AT_BLE_COMMAND_SUPPORT=n
 CONFIG_AT_BLE_HID_COMMAND_SUPPORT=n
 CONFIG_AT_BLUFI_COMMAND_SUPPORT=n
+CONFIG_LWIP_IP_FORWARD=y
+CONFIG_LWIP_IPV4_NAPT=y