下载安装OpenVPN：
用Flashget或者其它任何方式下载OpenVPN的安装包，然后安装，记得选上easy-rsa这部分脚本，
用于管理CA的bat脚本。
http://openvpn.se/files/install_packages/openvpn-2.0.5-gui-1.0.3-install.exe
安装完毕后，easy-rsa在C:\Program Files\OpenVPN\目录下。
下面开始配置：
把easy-rsa目录下的vars.bat.sample改名为vars.bat，并且修改其内容：
==================================
set KEY_COUNTRY=CN
set KEY_PROVINCE=Liaoning
set KEY_CITY=Shenyang
set KEY_ORG=OpenVPN
set [email protected]
==================================
其它部分就不用修改了，上面部分修改成你自己的配置。
把easy-rsa下的openssl.cnf.sample改成openssl.cnf。
然后进入cmd.exe
=============================================
Microsoft Windows XP [版本 5.1.2600]
(C) 版权所有 1985-2001 Microsoft Corp.
C:\Documents and Settings\Administrator>cd "\Program Files\OpenVPN\easy-rsa"
C:\Program Files\OpenVPN\easy-rsa>vars
C:\Program Files\OpenVPN\easy-rsa>clean-all.bat
系统找不到指定的文件。
已复制 1 个文件。
已复制 1 个文件。
C:\Program Files\OpenVPN\easy-rsa>
生成Root CA
格式: build-ca.bat
输出: keys/ca.crt keys/ca.key
======================================================================
C:\Program Files\OpenVPN\easy-rsa>build-ca.bat
Using configuration from openssl.cnf
Generating a 1024 bit RSA private key
......++++++
.........++++++
writing new private key to ‘keys\ca.key‘
-----
You are about to be asked to enter information that will be incorporated
into your certificate request.
What you are about to enter is what is called a Distinguished Name or a DN.
There are quite a few fields but you can leave some blank
For some fields there will be a default value,
If you enter ‘.‘, the field will be left blank.
-----
Country Name (2 letter code) [CN]:
State or Province Name (full name) [Liaoning]:
Locality Name (eg, city) [Shenyang]:
Organization Name (eg, company) [OpenVPN]:
Organizational Unit Name (eg, section) []:OpenVPN ORG
Common Name (eg, your name or your server‘s hostname) []:OpenVPN RootCA
Email Address [[email protected]]:
C:\Program Files\OpenVPN\easy-rsa>
生成dh1024.pem文件，Server使用TLS必须使用的一个文件。
格式: build-dh.bat
输出: keys/dh1024.pem
============================================================================
C:\Program Files\OpenVPN\easy-rsa>build-dh.bat
warning, not much extra random data, consider using the -rand option
Generating DH parameters, 1024 bit long safe prime, generator 2
This is going to take a long time
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*
C:\Program Files\OpenVPN\easy-rsa>
下面开始生成Server使用的证书了：
格式: build-key-server.bat
输出: keys/.crt .csr .key
================================================================================
C:\Program Files\OpenVPN\easy-rsa>build-key-server.bat server01
Using configuration from openssl.cnf
Generating a 1024 bit RSA private key
................++++++
.....++++++
writing new private key to ‘keys\server01.key‘
-----
You are about to be asked to enter information that will be incorporated
into your certificate request.
What you are about to enter is what is called a Distinguished Name or a DN.
There are quite a few fields but you can leave some blank
For some fields there will be a default value,
If you enter ‘.‘, the field will be left blank.
-----
Country Name (2 letter code) [CN]:
State or Province Name (full name) [Liaoning]:
Locality Name (eg, city) [Shenyang]:
Organization Name (eg, company) [OpenVPN]:
Organizational Unit Name (eg, section) []:OpenVPN ORG
Common Name (eg, your name or your server‘s hostname) []:Server01
Email Address [[email protected]]:
Please enter the following ‘extra‘ attributes
to be sent with your certificate request
A challenge password []:
An optional company name []:
Using configuration from openssl.cnf
Check that the request matches the signature
Signature ok
The Subjects Distinguished Name is as follows
countryName :PRINTABLE:‘CN‘
stateOrProvinceName :PRINTABLE:‘Liaoning‘
localityName :PRINTABLE:‘Shenyang‘
organizationName :PRINTABLE:‘OpenVPN‘
organizationalUnitName:PRINTABLE:‘OpenVPN ORG‘
commonName :PRINTABLE:‘Server01‘
emailAddress :IA5STRING:‘[email protected]‘
Certificate is to be certified until Feb 9 10:01:34 2016 GMT (3650 days)
Sign the certificate? [y/n]:y
1 out of 1 certificate requests certified, commit? [y/n]y
Write out database with 1 new entries
Data Base Updated
C:\Program Files\OpenVPN\easy-rsa>
下面开始为client***书：
格式: build-key.bat
输出: keys/.crt keys/.csr keys/.key
===========================================================================
C:\Program Files\OpenVPN\easy-rsa>build-key.bat elm
Using configuration from openssl.cnf
Generating a 1024 bit RSA private key
.....................................................++++++
...................................................++++++
writing new private key to ‘keys\elm.key‘
-----
You are about to be asked to enter information that will be incorporated
into your certificate request.
What you are about to enter is what is called a Distinguished Name or a DN.
There are quite a few fields but you can leave some blank
For some fields there will be a default value,
If you enter ‘.‘, the field will be left blank.
-----
Country Name (2 letter code) [CN]:
State or Province Name (full name) [Liaoning]:
Locality Name (eg, city) [Shenyang]:
Organization Name (eg, company) [OpenVPN]:
Organizational Unit Name (eg, section) []:OpenVPN ORG
Common Name (eg, your name or your server‘s hostname) []:ELM
Email Address [[email protected]]:
Please enter the following ‘extra‘ attributes
to be sent with your certificate request
A challenge password []:
An optional company name []:
Using configuration from openssl.cnf
Check that the request matches the signature
Signature ok
The Subjects Distinguished Name is as follows
countryName :PRINTABLE:‘CN‘
stateOrProvinceName :PRINTABLE:‘Liaoning‘
localityName :PRINTABLE:‘Shenyang‘
organizationName :PRINTABLE:‘OpenVPN‘
organizationalUnitName:PRINTABLE:‘OpenVPN ORG‘
commonName :PRINTABLE:‘ELM‘
emailAddress :IA5STRING:‘[email protected]‘
Certificate is to be certified until Feb 9 10:05:53 2016 GMT (3650 days)
Sign the certificate? [y/n]:y
1 out of 1 certificate requests certified, commit? [y/n]y
Write out database with 1 new entries
Data Base Updated
C:\Program Files\OpenVPN\easy-rsa>
下面生成ta.key文件
格式: openvpn --genkey --secret keys/ta.key
输出: keys/ta.key
=========================================================================
C:\Program Files\OpenVPN\easy-rsa>openvpn --genkey --secret keys/ta.key
C:\Program Files\OpenVPN\easy-rsa>
OK，那些keys就搞定了，下面开始写配置文件。
server01.ovpn内容：
----------------CUT Here-------------
port 1194
proto udp
dev tap
ca ca.crt
cert server01.crt
key server01.key # This file should be kept secret
;crl-verify vpncrl.pem
dh dh1024.pem
server 10.8.0.0 255.255.255.0
ifconfig-pool-persist ipp.txt
client-to-client
;duplicate-cn
keepalive 10 120
tls-auth ta.key 0 # This file is secret
comp-lzo
;max-clients 100
user nobody
group nobody
persist-key
persist-tun
status openvpn-status.log
verb 3
--------------Cut Here-----------------
把配置文件放到C:\Program Files\OpenVPN\config\目录下。
把easy-rsa\keys\下的 ca.crt server01.crt server01.key ta.key dh1024.pem
复制到server01.ovpn所在目录。
Server的配置已经结束，可以启动Server了，在右下角OpenVPN-gui上点右键，然后选择connected。
需要服务器启动后自动运行，修改 "控制面板" 下面的 "管理工具" 下的 "服务" 把OpenVPN设置成自动启动。
Client的配置文件：
-------------Cut Here---------------------
client
dev tap
proto udp
remote 61.1.1.2 1194
;remote my-server-2 1194
;remote-random
resolv-retry infinite
nobind
user nobody
group nobody
route 192.168.0.0 255.255.252.0
persist-key
persist-tun
;http-proxy-retry # retry on connection failures
;http-proxy [proxy server] [proxy port #]
ca ca.crt
cert elm.crt
key elm.key
ns-cert-type server
tls-auth ta.key 1
comp-lzo
# Set log file verbosity.
verb 4
--------------Cut Here---------------------
并且把easy-rsa/keys下的ca.crt elm.crt elm.key ta.key一起放到Client的
<openvpn_home>\config目录下。
Client的配置已经结束，可以连接Server了，在右下角OpenVPN-gui上点右键，然后选择connected。
OK，整个配置就完成了。
需要为其它用户颁发证书，只需如下步骤：
进入cmd.exe
cd <openvpn_home>\easy-rsa
vars.bat
build-kye.bat
Client所需要的文件：
client.ovpn (需要修改部分配置)
ca.crt
.crt
.key (为 文件名，如: elm 等)
ta.key
原地址：
http://blog.chinaunix.net/uid-26631328-id-3062741.html