diff --git a/connect-huawei-e3372.sh b/connect-huawei-e3372.sh
old mode 100644
new mode 100755
index 5333e17..fb546cd
--- a/connect-huawei-e3372.sh
+++ b/connect-huawei-e3372.sh
@@ -5,6 +5,14 @@
 modprobe -v option
 # For Huawei CDC NCM ether card
 modprobe -v huawei_cdc_ncm
-usb_modeswitch -v 0x12d1 -p 0x14fe -J
-sleep 2
+usb_modeswitch -v 0x12d1 -p 0x14fe -V 0x12d1 -P 0x1506 -J
+sleep 5
+# TODO need to wait that /dev/ttyUSB0 to be created
 echo -ne "AT^NDISDUP=1,1,\"sl2sfr\"\r\n" > /dev/ttyUSB0
+sleep 3
+# TODO need to wait until CONNECTED with 4G network
+udhcpc -i wwan0
+iptables -t nat -A POSTROUTING -o wwan0 -j MASQUERADE
+iptables -A FORWARD -i br0 -j ACCEPT
+iptables -t mangle -A FORWARD -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu
+
diff --git a/refresh-connect-huawei-e3372.sh b/refresh-connect-huawei-e3372.sh
old mode 100644
new mode 100755