diff --git a/README.md b/README.md
index 2bce6e4..3e9b67a 100644
--- a/README.md
+++ b/README.md
@@ -26,12 +26,12 @@ Command Line Scripts for ZJU (VPN / WLAN / DNS)
 
 ### Debian / Ubuntu
 
-https://github.com/QSCTech/zjunet/releases 
+https://github.com/QSCTech/zjunet/releases
 下载 deb，双击安装就是。
 
 ### Openwrt
 
-https://github.com/QSCTech/zjunet/releases 
+https://github.com/QSCTech/zjunet/releases
 下载 opk，然后 `opkg install` 就是。
 
 ### From source
diff --git a/lib/user.sh b/lib/user.sh
index 48e44c3..84f750b 100755
--- a/lib/user.sh
+++ b/lib/user.sh
@@ -19,21 +19,18 @@
 # <http://www.gnu.org/licenses/>.
 
 # init
-users_enabled="$HOME/.zjunet/users-enabled"
-users_disabled="$HOME/.zjunet/users-disabled"
-mkdir -p $users_enabled
-mkdir -p $users_disabled
+
+L2TPD_CFG_FILE=/etc/xl2tpd/xl2tpd.conf
 
 BASEDIR=$(dirname $0)
 
 getall() {
-    ls -1A $users_enabled | xargs | tr "\n" " "
+    cat $L2TPD_CFG_FILE | grep lac | sed 's/\[lac zju-l2tp-//' | sed 's/\]//'
 }
 
 edituser() {
     username=$1
     password=$2
-    echo $password > "$users_enabled/${username}"
     echo "[INFO] Disconnect VPN"
     "${BASEDIR}/vpn.sh" disconnect
     echo "[INFO] Write to xl2tpd.conf"
@@ -45,18 +42,6 @@ edituser() {
 # 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
@@ -70,14 +55,8 @@ case "$1" in
         edituser $username $password
         ;;
 
-    delete)
-        users=$(getall)
-        read -p "Delete User [ ${users}]: " username
-        rm -i "$users_enabled/${username}"
-        ;;
-
     list)
-        ls -1A $users_enabled
+        getall
         ;;
 
     # Get a user
@@ -107,8 +86,9 @@ case "$1" in
     # @private
     getpwd)
         username=$2
-        cat "${users_enabled}/${username}"
+        "${BASEDIR}/sudo.sh" cat /etc/ppp/peers/zju-l2tp-${username} | grep password | sed 's/password //'
         ;;
+
     *)
         ${BASEDIR}/zjunet.sh usage
         ;;
diff --git a/lib/vpn.sh b/lib/vpn.sh
index c39efa9..593ed41 100755
--- a/lib/vpn.sh
+++ b/lib/vpn.sh
@@ -42,12 +42,16 @@ disconnect() {
 
 connect() {
     disconnect
+    sleep 3
+
     users=$("${BASEDIR}/user.sh" getall)
 
+    "${BASEDIR}/sudo.sh" "${BASEDIR}/xl2tpd.sh" restart
+
     for username in $users; do
         password=$("${BASEDIR}/user.sh" getpwd $username)
         echo "[INFO] Login using ${username}"
-        "${BASEDIR}/sudo.sh" "${BASEDIR}/xl2tpd.sh" connect $username $password
+        "${BASEDIR}/sudo.sh" "${BASEDIR}/xl2tpd.sh" waituser $username
         flush
     done
 
diff --git a/lib/xl2tpd.sh b/lib/xl2tpd.sh
index 2c022e4..c3410a4 100755
--- a/lib/xl2tpd.sh
+++ b/lib/xl2tpd.sh
@@ -27,7 +27,7 @@ L2TPD_CFG_FILE=/etc/xl2tpd/xl2tpd.conf
 USERNAME=$2
 PASSWORD=$3
 LAC_NAME=zju-l2tp-${USERNAME}
-PPP_LOG_FILE=/tmp/zju-l2tp-log
+PPP_LOG_FILE=/tmp/zju-l2tp-log-${USERNAME}
 PPP_OPT_FILE=/etc/ppp/peers/${LAC_NAME}
 
 mkdir -p /var/log/zjunet/
@@ -86,7 +86,6 @@ xl2tpd_restart() {
 }
 
 xl2tpd_create_lac() {
-    #touch $PPP_LOG_FILE
 
     cat > $PPP_OPT_FILE <<EOF
 noauth
@@ -123,14 +122,7 @@ xl2tpd_disconnect() {
     xl2tpd-control disconnect $1
 }
 
-connect() {
-    xl2tpd_disconnect ${LAC_NAME}
-    xl2tpd_connect ${LAC_NAME}
-
-    echo -n > $PPP_LOG_FILE
-
-    prev_count=$(ip addr show | grep 'inet.*ppp' | grep ' 10.5.' | wc -l)
-
+xl2tpd_waituser() {
     for i in $(seq 0 10000); do
 
         tail $PPP_LOG_FILE >> $LOG_FILE
@@ -146,10 +138,13 @@ connect() {
         fi
         echo -n > $PPP_LOG_FILE
 
-        count=$(ip addr show | grep 'inet.*ppp' | grep ' 10.5.' | wc -l)
-        if [ ${count} -gt ${prev_count} ]; then
-            echo "Bring up ppp, done."
-            return
+        pid="/var/run/ppp-${LAC_NAME}.pid"
+        if [ -e $pid ]; then
+            ppp=$(cat $pid | grep ppp)
+            if ip addr show | grep "inet.*${ppp}" > /dev/null; then
+                ip addr show | grep "inet.*${ppp}" | sed 's/^ */[VPN] /'
+                return
+            fi
         fi
 
     done
@@ -180,8 +175,8 @@ case $1 in
         xl2tpd_create_lac
         ;;
 
-    connect)
-        connect
+    waituser)
+        xl2tpd_waituser
         ;;
 
     disconnect)
diff --git a/lib/zjunet.sh b/lib/zjunet.sh
index 930a3d0..22a64dd 100755
--- a/lib/zjunet.sh
+++ b/lib/zjunet.sh
@@ -52,11 +52,9 @@ Usage: zjunet [ACTION]
 Actions:
     user
         add            Add a user
-        edit           Edit a (enabled) user
-        delete         Delete a (enabled) user
         list           List all enabled users
-        enable         Enable a user
-        disable        Disable a user
+        edit           Edit a (enabled) user
+        Note: to delete/disable a user, edit /etc/xl2tpd/xl2tpd.conf yourself
     all
         connect(-c)    Connect VPN & ZJUWLAN, and combine them using nexthop
         disconnect(-d) Disconnect VPN & ZJUWLAN