diff --git a/user.sh b/user.sh
index 1e3cdea..58135a8 100755
--- a/user.sh
+++ b/user.sh
@@ -19,53 +19,68 @@
 # <http://www.gnu.org/licenses/>.
 
 # init
-DIR="$HOME/.zjunet"
-mkdir -p $DIR
+users_enabled="$HOME/.zjunet/users-enabled"
+users_disabled="$HOME/.zjunet/users-disabled"
+mkdir -p $users_enabled
+mkdir -p $users_disabled
 
 getall() {
-    ls -1A $DIR | xargs | tr "\n" " "
+    ls -1A $users_enabled | xargs | tr "\n" " "
 }
 
 # dispatch
 case "$1" in
 
+    enable)
+        users=$(ls -1A $users_disabled | xargs | tr "\n" " ")
+        read -p "Enable User [ ${users}]: " username
+        mv "${users_disabled}/${username}" "${users_enabled}/${username}"
+        ;;
+
+    disable)
+        users=$(getall)
+        read -p "Disable User [ ${users}]: " username
+        mv "${users_enabled}/${username}" "${users_disabled}/${username}"
+        ;;
+
     add)
-        read -p "USERNAME: " USERNAME
-        read -p "PASSWORD: " PASSWORD
-        echo $PASSWORD > "$DIR/${USERNAME}"
+        read -p "username: " username
+        read -p "password: " password
+        echo $password > "$users_enabled/${username}"
         ;;
 
     edit)
-        read -p "USERNAME: " USERNAME
-        read -p "PASSWORD: " PASSWORD
-        echo $PASSWORD > "$DIR/${USERNAME}"
+        users=$(getall)
+        read -p "username [ ${users}]: " username
+        read -p "password: " password
+        echo $password > "$users_enabled/${username}"
         ;;
 
     delete)
-        USERS=$(getall)
-        read -p "Delete User [ ${USERS}]: " USERNAME
-        rm -i "$DIR/${USERNAME}"
+        users=$(getall)
+        read -p "Delete User [ ${users}]: " username
+        rm -i "$users_enabled/${username}"
         ;;
 
     list)
-        ls -1A $DIR
+        ls -1A $users_enabled
         ;;
 
     # Get a user
     # @private
     get)
-        COUNT=$(ls -1A $DIR | wc -l)
+        count=$(ls -1A $users_enabled | wc -l)
         if [ "${COUNT}" -eq "0" ]; then
             echo "No user found. Use 'zjunet user add' to add a user."
             exit 1
         else
-            if [ "${COUNT}" -gt "1" ]; then
-                USERS=$(getall)
-                read -p "Choose User [ ${USERS}]: " USERNAME
+            if [ "${count}" -gt "1" ]; then
+                users=$(getall)
+                read -p "Choose User [ ${users}]: " username
             else
-                USERNAME=$(ls -1 $DIR | head -n1)
+                username=$(ls -1 $users_enabled | head -n1)
             fi
-            echo $USERNAME
+            echo $username
         fi
         ;;
 
@@ -77,8 +92,8 @@ case "$1" in
 
     # @private
     getpwd)
-        USERNAME=$2
-        cat "$DIR/${USERNAME}"
+        username=$2
+        cat "${users_enabled}/${username}"
         ;;
     *)
         ${BASEDIR}/zjunet.sh usage
diff --git a/vpn.sh b/vpn.sh
index 2e33867..5d382ea 100755
--- a/vpn.sh
+++ b/vpn.sh
@@ -26,16 +26,18 @@ disconnect() {
 }
 
 set_up_routes() {
-    # IP=$(ip route show 0/0 | cut -d " " -f 3)
 
-    # case "$IP" in
-    #     10.189.*)
-    #         return
-    #         ;;
-    #     10.171.*)
-    #         return
-    #         ;;
-    # esac
+    IP=$(ip route show 0/0 | cut -d " " -f 3)
+
+    case "$IP" in
+        10.189.*)
+            ;;
+        10.171.*)
+            ;;
+        *)
+            # 内网静态路由 TODO
+            ;;
+    esac
 
     # # set up routes here
 
diff --git a/xl2tpd.sh b/xl2tpd.sh
index 48e29d0..6f31111 100755
--- a/xl2tpd.sh
+++ b/xl2tpd.sh
@@ -41,12 +41,15 @@ xl2tpd_restart() {
     }
     
     # wait until ready
-    for i in $(seq 0 120); do
+    for i in $(seq 0 10); do
         if [ -e "/var/run/xl2tpd/l2tp-control" ]; then
             return 0
         fi
         sleep 1
     done
+
+    echo "Fail to start xl2tpd"
+    exit 1
 }
 
 xl2tpd_create_lac() {
@@ -92,6 +95,8 @@ connect() {
         tail $PPP_LOG_FILE
         echo -n > $PPP_LOG_FILE
 
+        echo "Try to bring up ppp."
+
         count=$(ip addr show | grep 'inet.*ppp' | grep ' 10.5.' | wc -l)
         if [ ${count} -gt ${prev_count} ]; then
             echo "Bring up ppp, done."
diff --git a/zjunet.sh b/zjunet.sh
index d0c8ccf..8d0787f 100755
--- a/zjunet.sh
+++ b/zjunet.sh
@@ -43,11 +43,11 @@ 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
+        user add/edit/delete/list/enable/disable     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