yum -y install openssl-devel openssl
yum -y install gcc gcc-c++

cd /apps  #安装目录
wget ftp://www.wudonghang.com/soft/openvpn-2.1_rc15.tar.gz #下载lzo
tar zxvf lzo-2.04.tar.gz  #解压
cd lzo-2.04
./configure ; make ; make install  #编译与安装 

cd /apps
wget http://openvpn.net/release/openvpn-2.1_rc15.tar.gz
tar zxvf openvpn-2.1_rc15.tar.gz
cd openvpn-2.1_rc15
./configure ; make ; make install

cp -r /apps/openvpn-2.1_rc15/ /etc/openvpn #用easy-rsa生成服务器证书客户端证书 

cd /etc/openvpn/easy-rsa/2.0
./vars
source vars 

./clean-all
./build-ca 

./build-key-server server

./build-dh 

./build-key client1 #与server key 设置一致

./build-key client2
./build-key client3

vi /etc/openvpn/easy-rsa/2.0/keys/client1.ovpn

client
remote 192.168.80.129 1194
dev tun #说明连接方式是点对点的连接，如要以以太网的方式则可以将tun修改为tap
proto tcp
resolv-retry infinite
nobind
persist-key
persist-tun
ca ca.crt
cert client1.crt
key client1.key
ns-cert-type server
comp-lzo
route-delay 2
route-method exe
verb 3

tar czf keys.tgz ca.crt ca.key client1.crt client1.csr client1.key client1.ovpn
mv keys.tgz /root 

port 1194
proto tcp
dev tun #说明连接方式是点对点的连接，如要以以太网的方式则可以将tun修改为tap
ca /etc/openvpn/easy-rsa/2.0/keys/ca.crt
cert /etc/openvpn/easy-rsa/2.0/keys/server.crt
key /etc/openvpn/easy-rsa/2.0/keys/server.key
dh /etc/openvpn/easy-rsa/2.0/keys/dh1024.pem
server 10.8.0.0 255.255.255.0
ifconfig-pool-persist ipp.txt
push "redirect-gateway"
push "route 172.18.2.0 255.255.255.0" #路由转发到内网网段
push "dhcp-option DNS 172.18.2.1"
push "dhcp-option DNS 8.8.8.8"
keepalive 10 120
comp-lzo
persist-key
persist-tun
client-to-client #如果不加则各个客户端之间将无法连接 

echo 1 > /proc/sys/net/ipv4/ip_forward
iptables -t nat -A POSTROUTING -s 10.8.0.0/24 -o venet0 -j MASQUERADE
iptables-save > /etc/sysconfig/iptables
sed -i 's/eth0/venet0/g' /etc/sysconfig/iptables # dirty vz fix for iptables-save
echo "net.ipv4.ip_forward=1" >> /etc/sysctl.conf

/usr/local/sbin/openvpn --config /etc/openvpn/server.conf

cp /apps/openvpn-2.1_rc15/sample-scripts/openvpn.init /etc/init.d/openvpn
chmod 700 /etc/init.d/openvpn
chkconfig --add openvpn
chkconfig --level 345 openvpn on 

service openvpn start

lsof -i:1194

client-to-client
client-config-dir ccd
route 192.168.1.0 255.255.255.0

iroute 192.168.1.0 255.255.255.0

push "route 192.168.1.0 255.255.255.0"

#!/bin/bash
# Quick and dirty OpenVPN install script
# Tested on Centos 5.x 32bit, openvz minimal CentOS OS templates
# Please submit feedback and questions at support@vpsnoc.com
 
# John Malkowski vpsnoc.com 01/04/2010
 
ip=`grep IPADDR /etc/sysconfig/network-scripts/ifcfg-venet0:0 | awk -F= '{print $2}'`
 
wget http://packages.sw.be/rpmforge-release/rpmforge-release-0.3.6-1.el5.rf.i386.rpm
rpm -iv rpmforge-release-0.3.6-1.el5.rf.i386.rpm
rm -rf rpmforge-release-0.3.6-1.el5.rf.i386.rpm
 
yum -y install openvpn openssl openssl-devel
cd /etc/openvpn/
cp -R /usr/share/doc/openvpn-2.2.0/easy-rsa/ /etc/openvpn/
cd /etc/openvpn/easy-rsa/2.0/
chmod +rwx *
./vars
./clean-all
source ./vars
 
echo -e "\n\n\n\n\n\n\n" | ./build-ca
clear
echo "####################################"
echo "Feel free to accept default values"
echo "Wouldn't recommend setting a password here"
echo "Then you'd have to type in the password each time openVPN starts/restarts"
echo "####################################"
./build-key-server server
./build-dh
cp keys/{ca.crt,ca.key,server.crt,server.key,dh1024.pem} /etc/openvpn/
 
clear
echo "####################################"
echo "Feel free to accept default values"
echo "This is your client key, you may set a password here but it's not required"
echo "####################################"
./build-key client1
cd keys/
 
client="
client
remote $ip 1194
dev tun
comp-lzo
ca ca.crt
cert client1.crt
key client1.key
route-delay 2
route-method exe
redirect-gateway def1
dhcp-option DNS 10.8.0.1
verb 3"
 
echo "$client" > $HOSTNAME.ovpn
 
tar czf keys.tgz ca.crt ca.key client1.crt client1.csr client1.key $HOSTNAME.ovpn
mv keys.tgz /root
 
opvpn='
dev tun
server 10.8.0.0 255.255.255.0
ifconfig-pool-persist ipp.txt
ca ca.crt
cert server.crt
key server.key
dh dh1024.pem
push "route 10.8.0.0 255.255.255.0"
push "redirect-gateway"
comp-lzo
keepalive 10 60
ping-timer-rem
persist-tun
persist-key
group nobody
daemon'
 
echo "$opvpn" > /etc/openvpn/openvpn.conf
 
echo 1 > /proc/sys/net/ipv4/ip_forward
iptables -t nat -A POSTROUTING -s 10.8.0.0/24 -o venet0 -j MASQUERADE
iptables-save > /etc/sysconfig/iptables
sed -i 's/eth0/venet0/g' /etc/sysconfig/iptables # dirty vz fix for iptables-save
echo "net.ipv4.ip_forward=1" >> /etc/sysctl.conf
 
/etc/init.d/openvpn start
clear
 
echo "OpenVPN has been installed
Download /root/keys.tgz using winscp or other sftp/scp client such as filezilla
Create a directory named vpn at C:\Program Files\OpenVPN\config\ and untar the content of keys.tgz there
Start openvpn-gui, right click the tray icon go to vpn and click connect
For support/bug reports email us at support@vpsnoc.com"