diff --git a/demo/00_bootstrap.sh b/demo/00_bootstrap.sh
new file mode 100755
index 0000000..fd9095e
--- /dev/null
+++ b/demo/00_bootstrap.sh
@@ -0,0 +1,13 @@
+#!/bin/sh
+
+HTTP_PROXY=${HTTP_PROXY:-http://proxy-chain.intel.com:911}
+cat <<EOF | sudo tee /etc/apt/apt.conf
+Acquire::http::Proxy "$HTTP_PROXY";
+EOF
+
+sudo apt-get update -y
+sudo apt-get install -y git
+
+git config --global http.proxy ${HTTP_PROXY}
+git clone https://github.com/openstack/fuel-plugin-ovs/
+git config --global --unset http.proxy
diff --git a/demo/01_setup_network.sh b/demo/01_setup_redsocks.sh
similarity index 52%
rename from demo/01_setup_network.sh
rename to demo/01_setup_redsocks.sh
index fefac8f..d05f35b 100755
--- a/demo/01_setup_network.sh
+++ b/demo/01_setup_redsocks.sh
@@ -1,38 +1,8 @@
 #!/bin/sh
 
-HTTP_PROXY=${HTTP_PROXY:-http://10.19.8.225:911}
-DNS_SERVER=${DNS_SERVER:-10.248.2.1}
 SOCKS5_IP=${SOCKS5_IP:-10.7.211.16}
 SOCKS5_PORT=${SOCKS5:-1080}
-
-for i in "$@"
-do
-case $i in
-    -h=*|--http=*)
-    HTTP_PROXY="${i#*=}"
-    shift
-    ;;
-    -d=*|--dns=*)
-    DNS_SERVER="${i#*=}"
-    shift
-    ;;
-    -s=*|--socks5-ip=*)
-    SOCKS5_IP="${i#*=}"
-    shift
-    ;;
-    -p=*|--socks5-port=*)
-    SOCKS5_PORT="${i#*=}"
-    shift
-    ;;
-    *)
-    # unknown option
-    ;;
-esac
-done
-
-cat <<EOF | sudo tee /etc/apt/apt.conf
-Acquire::http::Proxy "$HTTP_PROXY";
-EOF
+RED_TCPORT=${RED_TCPORT:-6666}
 
 sudo apt-get update -y
 sudo apt-get install redsocks -y
@@ -48,7 +18,7 @@ base {
 
 redsocks {
  local_ip = 0.0.0.0;
- local_port = 6666;
+ local_port = ${RED_TCPORT};
  ip = $SOCKS5_IP;
  port = $SOCKS5_PORT;
  type = socks5;
@@ -58,21 +28,12 @@ EOF
 
 sudo apt-get install iptables -y
 
-echo  1 | sudo tee /proc/sys/net/ipv4/ip_forward 
+echo  1 | sudo tee /proc/sys/net/ipv4/ip_forward
 
 sudo iptables -t filter -F
 sudo iptables -t mangle -F
 sudo iptables -t nat -F
 
-#DNS DNAT
-sudo iptables -t nat -A PREROUTING  -p udp --dport 53  -j DNAT --to-destination $DNS_SERVER
-
-#NTP DNAT
-sudo iptables -t nat -A PREROUTING  -p udp --dport 123 -j DNAT --to-destination 10.20.0.1
-
-sudo iptables -t nat -A POSTROUTING -s 10.20.0.0/24 -j MASQUERADE
-sudo iptables -t nat -A POSTROUTING -s 172.16.0.0/24 -j MASQUERADE
-
 sudo iptables -t nat -N REDSOCKS
 sudo iptables -t nat -A REDSOCKS -d 0.0.0.0/8 -j RETURN
 sudo iptables -t nat -A REDSOCKS -d 10.0.0.0/8 -j RETURN
@@ -82,8 +43,7 @@ sudo iptables -t nat -A REDSOCKS -d 172.16.0.0/12 -j RETURN
 sudo iptables -t nat -A REDSOCKS -d 192.168.0.0/16 -j RETURN
 sudo iptables -t nat -A REDSOCKS -d 224.0.0.0/4 -j RETURN
 sudo iptables -t nat -A REDSOCKS -d 240.0.0.0/4 -j RETURN
-sudo iptables -t nat -A REDSOCKS -p tcp -j REDIRECT --to-ports 6666
-sudo iptables -t nat -A REDSOCKS -p udp -j REDIRECT --to-ports 9999
+sudo iptables -t nat -A REDSOCKS -p tcp -j REDIRECT --to-ports ${RED_TCPORT}
 sudo iptables -t nat -A OUTPUT -p tcp  -j REDSOCKS
 sudo iptables -t nat -A PREROUTING -p tcp  -j REDSOCKS
 
diff --git a/demo/04_setup_fuel.sh b/demo/04_setup_fuel.sh
index acb884c..3e6cc50 100755
--- a/demo/04_setup_fuel.sh
+++ b/demo/04_setup_fuel.sh
@@ -1,5 +1,7 @@
 #!/bin/bash
 
+DNS_SERVER=${DNS_SERVER:-10.248.2.1}
+
 #setup ntp server
 sudo service ntp restart
 
@@ -19,6 +21,20 @@ sudo ifconfig br-dpdk down
 sudo brctl delbr br-dpdk
 sudo brctl addbr br-dpdk
 
+sudo iptables -t nat -D PREROUTING  -j PRE_FUEL
+sudo iptables -t nat -N PRE_FUEL
+sudo iptables -t nat -F PRE_FUEL
+sudo iptables -t nat -A PRE_FUEL -p udp --dport 53  -j DNAT --to-destination $DNS_SERVER
+sudo iptables -t nat -A PRE_FUEL -p udp --dport 123 -j DNAT --to-destination 10.20.0.1
+sudo iptables -t nat -A PREROUTING  -j PRE_FUEL
+
+sudo iptables -t nat -D POSTROUTING  -j POST_FUEL
+sudo iptables -t nat -N POST_FUEL
+sudo iptables -t nat -F POST_FUEL
+sudo iptables -t nat -A POST_FUEL -s 10.20.0.0/24 -j MASQUERADE
+sudo iptables -t nat -A POST_FUEL -s 172.16.0.0/24 -j MASQUERADE
+sudo iptables -t nat -A POSTROUTING  -j POST_FUEL
+
 #setup master
 
 sudo virt-manager
diff --git a/demo/README.md b/demo/README.md
index a19525e..474c15e 100644
--- a/demo/README.md
+++ b/demo/README.md
@@ -19,19 +19,19 @@ the following scripts.
 Scripts
 -------
 
+0. 00_bootstrap.sh
+   a. copy from https://raw.githubusercontent.com/openstack/fuel-plugin-ovs/master/demo/00_bootstrap.sh
+   b. change HTTP_PROXY
+   c. run the script
+
 1. 01_setup_network.sh
 
 The script is to setup socks5 proxy. You may change the script to support
 NAT. The following network setting is updated before running the script:
 
-a. HTTP_PROXY: proxy for package installation
-b. DNS_SERVER: DNS for fuel VM
-c. SOCK5_IP:  socks5 proxy for fuel VM
-d. SOCK5_PORT: socks5 proxy for fuel VM
-
-In fresh installation, 01_setup_network.sh can be run by:
-
-curl --socks5 <socks5-proxy> https://raw.githubusercontent.com/openstack/fuel-plugin-ovs/master/demo/01_setup_network.sh | bash -s -- -h=<http-proxy>-d=<dns-server> -s=<socks5-ip> -p=<socks5-port>
+a. SOCK5_IP:  socks5 proxy for fuel VM
+b. SOCK5_PORT: socks5 proxy for fuel VM
+b. RED_TCPORT: redsocks tcp port
 
 2. 02_install_packages.sh
 
@@ -43,8 +43,11 @@ The script is to setup vnc. Default vnc password is 123456.
 
 4. 04_setup_fuel.sh
 
-The script is to create 1 master VM and 4 slave VMs. Fuel ISO is copied to this
-directory before running the script.
+The script is to create 1 master VM and 4 slave VMs:
+
+a. change DNS_SERVER
+b. download ISO. Examle: http://seed-us1.fuel-infra.org/fuelweb-community-release/fuel-community-9.0.iso.
+c. run the script
 
 5. 05_destroy_fuel.sh