diff --git a/user.sh b/user.sh
index 46c44c6..1e3cdea 100755
--- a/user.sh
+++ b/user.sh
@@ -80,4 +80,7 @@ case "$1" in
         USERNAME=$2
         cat "$DIR/${USERNAME}"
         ;;
+    *)
+        ${BASEDIR}/zjunet.sh usage
+        ;;
 esac
diff --git a/vpn.sh b/vpn.sh
index efd0b93..bba203f 100755
--- a/vpn.sh
+++ b/vpn.sh
@@ -41,7 +41,16 @@ set_up_routes() {
     esac
 
     # set up routes here
-    # todo
+
+    GW=$(ip route get $VPN_SERVER 2>/dev/null | grep via | awk '{print $3}')
+    PPP=$(ip addr show | grep ppp[0-9]: | cut "-d " -f2 | cut -d: -f1)
+    echo "[MSG] Detected gateway: $GW, PPP device: $PPP ."
+
+    ip route add  10.0.0.0/8 via $GW
+    ip route add   0.0.0.0/1 dev $PPP
+    ip route add 128.0.0.0/1 dev $PPP
+
+    # todo nexthop
 }
 
 connect() {
diff --git a/wlan.sh b/wlan.sh
index b0d07aa..1154d43 100755
--- a/wlan.sh
+++ b/wlan.sh
@@ -76,9 +76,6 @@ case "$1" in
         logout $USERNAME $PASSWORD
         ;;
     *)
-        echo "Usage: "
-        echo "    zjunet wlan login"
-        echo "    zjunet wlan logout"
+        ${BASEDIR}/zjunet.sh usage
         ;;
 esac
-
diff --git a/zjunet.sh b/zjunet.sh
index c269b91..d0c8ccf 100755
--- a/zjunet.sh
+++ b/zjunet.sh
@@ -36,4 +36,18 @@ case "$1" in
     dns)
         "${BASEDIR}/dns.sh"
         ;;
+    *)
+        cat <<EOF
+zjunet: CLI Tool (VPN/WLAN/DNS) for Zjuer
+
+Usage: zjunet [ACTION]
+
+Actions:
+        user add/edit/delete/list        User Manager
+        vpn connect(-c)/disconnect(-d)   Connect VPN
+        wlan login/logout                ZJUWLAN    
+        ip                               Show IP
+        dns                              Test and set up DNS Server
+EOF
+        ;;
 esac