diff --git a/README.md b/README.md
index c38eb31..cdc194a 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@
 
 ## 安装
 
-  	sudo sh pptpd_x64.sh [subnet]
+  	sudo sh pptpd_x64.sh [subnet] [password]
   
   
 ## 添加用户
diff --git a/pptpd_i686.sh b/pptpd_i686.sh
index d91ccf9..f21c73e 100644
--- a/pptpd_i686.sh
+++ b/pptpd_i686.sh
@@ -1,8 +1,16 @@
 
-SUBNET=$1
-
-if [ -z "${SUBNET}" ]; then 
+SUBNET=
+PASS=
+
+if [ "$2" != "" ]; then
+  SUBNET=$1
+  PASS=$2
+elif [ "$1" != "" ]; then
+  SUBNET=$1
+  PASS=`openssl rand 6 -base64`
+else
   SUBNET=192.168.0
+  PASS=`openssl rand 6 -base64`
 fi
 
 yum remove -y pptpd ppp
@@ -20,11 +28,7 @@ echo "remoteip ${SUBNET}.234-238,${SUBNET}.245" >> /etc/pptpd.conf
 
 echo "ms-dns 8.8.8.8" >> /etc/ppp/options.pptpd
 echo "ms-dns 8.8.4.4" >> /etc/ppp/options.pptpd
-pass=`openssl rand 6 -base64`
-if [ "$1" != "" ]
-then pass=$1
-fi
-echo "vpn pptpd ${pass} *" >> /etc/ppp/chap-secrets
+echo "vpn pptpd ${PASS} *" >> /etc/ppp/chap-secrets
 
 sed -i 's/net.ipv4.ip_forward = 0/net.ipv4.ip_forward = 1/' /etc/sysctl.conf
 sed -i 's/net.ipv4.tcp_syncookies = 1/#net.ipv4.tcp_syncookies = 1/' /etc/sysctl.conf
diff --git a/pptpd_x64.sh b/pptpd_x64.sh
index 759b174..364d07d 100644
--- a/pptpd_x64.sh
+++ b/pptpd_x64.sh
@@ -1,8 +1,16 @@
 
-SUBNET=$1
-
-if [ -z "${SUBNET}" ]; then 
+SUBNET=
+PASS=
+
+if [ "$2" != "" ]; then
+  SUBNET=$1
+  PASS=$2
+elif [ "$1" != "" ]; then
+  SUBNET=$1
+  PASS=`openssl rand 6 -base64`
+else
   SUBNET=192.168.0
+  PASS=`openssl rand 6 -base64`
 fi
 
 yum remove -y pptpd ppp
@@ -21,11 +29,7 @@ echo "remoteip ${SUBNET}.234-238,${SUBNET}.245" >> /etc/pptpd.conf
 echo "debug" >> /etc/ppp/options.pptpd
 echo "ms-dns 8.8.8.8" >> /etc/ppp/options.pptpd
 echo "ms-dns 8.8.4.4" >> /etc/ppp/options.pptpd
-pass=`openssl rand 6 -base64`
-if [ "$1" != "" ]
-then pass=$1
-fi
-echo "vpn pptpd ${pass} *" >> /etc/ppp/chap-secrets
+echo "vpn pptpd ${PASS} *" >> /etc/ppp/chap-secrets
 
 sed -i 's/net.ipv4.ip_forward = 0/net.ipv4.ip_forward = 1/' /etc/sysctl.conf
 sed -i 's/net.ipv4.tcp_syncookies = 1/#net.ipv4.tcp_syncookies = 1/' /etc/sysctl.conf