RHEL5OpenVPN 安装和Windows OpenVPN GUI 安装笔记

RHEL5OpenVPN 安装和Windows OpenVPN GUI 安装笔记

                                                                                                 ----------------- 抚琴煮酒

        网上少有RHEL5配置openVPN的资料,所以特将RHEL5下的配置过程写下来,其过程与RHEL4大同小异,希望能给大家带来帮助,转载请注明我的博客地址http://hi.baidu.com/yuhongchun027

一、 安装服务器
1、 到http://openvpn.net/上下载openvpn的最新版，时至今日是openvpn-2.0.9.tar.gz。
a) 网上都说还需要lzo这个压缩库。我没有安装，在编译程序的时候只需要加上--disable-lzo就可以了。这样所有要安装的就是一个包openvpn-2.0.9.tar.gz。
2、 上传到服务器gait.buaa.edu.cn上，解开成为/root/openvpn-2.0.9。
3、 cd /root/openvpn-2.0.9
4、 ./configure --disable-lzo。

1)建立CA

在OpenVPN源代码目录下有一个\easy-rsa\2.0目录，进入后修改vars文件最后部分的信息：

export KEY_COUNTRY="CN"
export KEY_PROVINCE="BJ"
export KEY_CITY="Beijing"
export KEY_ORG="PKU"
export KEY_EMAIL=" xxxxxx@pku.edu.cn"

保存退出，再运行：

source vars
./clean-all
./build-ca

然后就是一段提示，要求输入信息，大部分信息默认就是上述vars文件里的信息，自己只需要填写“Organizational Unit Name”一项，这个随便写一个就是了，也可以不写，我就没有写。



2)为服务器生成证书和密钥

./build-key-server server

还是与上一步类似，自己只需要填写“Organizational Unit Name”一项，也可以不写,此步不写的话建立windows VPN client要能正确解析VPN服务器名,我更改的是c:\windows\system32/drivers/etc/hosts文件,将VPN服务器的域名解析文件写入此.

还会出现：“Sign the certificate? [y/n]”和“1 out of 1 certificate requests certified, commit? [y/n]”，都输入y然后回车。

./build-key-server server
./build-key-server server

Generating a 1024 bit RSA private key
......++++++
....................++++++
writing new private key to 'server.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) [BJ]:
Locality Name (eg, city) [BJ]:
Organization Name (eg, company) [buaa]:
Organizational Unit Name (eg, section) []:gait
Common Name (eg, your name or your server's hostname) []:server
Email Address [support@cooldvd.com]:

Please enter the following 'extra' attributes
to be sent with your certificate request
A challenge password []:abcd1234
An optional company name []:dvdmaster
Using configuration from /openvpn-2.0.5/easy-rsa/openssl.cnf
Check that the request matches the signature
Signature ok
The Subject's Distinguished Name is as follows
countryName :PRINTABLE:'CN'
stateOrProvinceName :PRINTABLE:'GD'
localityName :PRINTABLE:'SZ'
organizationName :PRINTABLE:'dvdmaster'
organizationalUnitName:PRINTABLE:'dvdmaster'
commonName :PRINTABLE:'server'
emailAddress :IA5STRING:'support@cooldvd.com'
Certificate is to be certified until Mar 19 08:15:31 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


3)在openvpn中，这种配置方法是每一个登陆的VPN客户端需要有一个证书，每个证书在同一时刻只能供一个客户端连接（如果有两个机器安装相同证书，同时拨服务器，都能拨上，但是只有第一个拨上的才能连通网络）。所以需要建立许多份证书。下面建立2份，名称分别为client1和client2
./build-key client1
Generating a 1024 bit RSA private key
.....++++++
......++++++
writing new private key to 'client1.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) [BJ]:
Locality Name (eg, city) [BJ]:
Organization Name (eg, company) [buaa]:
Organizational Unit Name (eg, section) []:gait
Common Name (eg, your name or your server's hostname) []:client1 #重要: 每个不同的 client 生成的证书, 名字必须不同.
Email Address [support@cooldvd.com]:

Please enter the following 'extra' attributes
to be sent with your certificate request
A challenge password []:abcd1234
An optional company name []:gait
Using configuration from /openvpn-2.0.5/easy-rsa/openssl.cnf
Check that the request matches the signature
Signature ok
The Subject's Distinguished Name is as follows
countryName :PRINTABLE:'CN'
stateOrProvinceName :PRINTABLE:'GD'
localityName :PRINTABLE:'SZ'
organizationName :PRINTABLE:'dvdmaster'
organizationalUnitName:PRINTABLE:'dvdmaster'
commonName :PRINTABLE:'client1'
emailAddress :IA5STRING:'support@cooldvd.com'
Certificate is to be certified until Mar 19 08:22:00 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


3)为客户端生成证书和密钥                                                                                                                openvpn中，这种配置方法是每一个登陆的VPN客户端需要有一个证书，每个证书在同一时刻只能供一个客户端连接（如果有两个机器安装相同证书，同时拨服务器，都能拨上，但是只有第一个拨上的才能连通网络）。所以需要建立许多份证书。下面建立三份，名称分别为client1和client2
-key client1
Generating a 1024 bit RSA private key
.....++++++
......++++++
writing new private key to 'client1.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) [BJ]:
Locality Name (eg, city) [BJ]:
Organization Name (eg, company) [buaa]:
Organizational Unit Name (eg, section) []:gait
Common Name (eg, your name or your server's hostname) []:client1 #重要: 每个不同的 client 生成的证书, 名字必须不同.
Email Address [support@cooldvd.com]:

Please enter the following 'extra' attributes
to be sent with your certificate request
A challenge password []:abcd1234
An optional company name []:gait
Using configuration from /openvpn-2.0.5/easy-rsa/openssl.cnf
Check that the request matches the signature
Signature ok
The Subject's Distinguished Name is as follows
countryName :PRINTABLE:'CN'
stateOrProvinceName :PRINTABLE:'GD'
localityName :PRINTABLE:'SZ'
organizationName :PRINTABLE:'dvdmaster'
organizationalUnitName:PRINTABLE:'dvdmaster'
commonName :PRINTABLE:'client1'
emailAddress :IA5STRING:'support@cooldvd.com'
Certificate is to be certified until Mar 19 08:22:00 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


依次类推生成其他客户端证书/key:
./build-key client2
./build-dh

4)配置服务器VPN文件
a) cp /root/openvpn-2.0.9/sample-config-files/server.conf /usr/local/etc/server.conf
b) vi /usr/local/etc/server.conf
i. proto udp改成proto tcp
ii. ca那四行改成
ca /root/openvpn-2.0.9/easy-rsa/keys/2.0/ca.crt
cert /root/openvpn-2.0.9/easy-rsa/keys/2.0/server.crt
key /root/openvpn-2.0.9/easy-rsa/keys/2.0/server.key
dh /root/openvpn-2.0.9/easy-rsa/keys/2.0/dh1024.pem
iii. server那行改成
server 10.0.0.0 255.255.255.0
iv. 注释掉comp-lzo
v. 改成verb 5可以多查看一些调试信息


5) 启动服务：
a) 关闭服务器、防火墙上所有对SSH（22）、openvpn（1194）的拦截。
b) echo 1> /proc/sys/net/ipv4/ip_forward
c) /usr/local/sbin/openvpn --config /usr/local/etc/server.conf

二.安装WidnowsVPN客户端

4. 安装客户端
1、 从http://openvpn.se/上下载与openvpn服务器版本一致的Windows客户端“OpenVPN GUI For Windows”
a) 例如, 服务器装的是 OpenVPN 2.09, 那么下载的 OpenVPN GUI fow windows应该是: openvpn-2.0.9-gui-1.0.3-install.exe
2、 执行openvpn-2.0.9-gui-1.0.3-install.exe。一切采用默认设置。
3、 将ca.crt、client1.crt、client1.key复制到C:\Program Files\OpenVPN\config。（不同用户使用不同的证书，每个证书包括.crt和.key两个文件，如client2.crt和client2.key）
4、 在/root/openvpn-2.0.9/sample-config-files/client.conf 的基础上建立客户端配置文件，改名为C:\Program Files\OpenVPN\config\client.ovpn
a) proto udp改成proto tcp
b) remote那行改成
gait.buaa.edu.cn 1194
c) ca那3行改为
ca ca.crt
cert client1.crt
key client1.key
d) 注释掉comp-lzo
5、 连接：在右下角的openvpn图标上右击，选择“Connect”。正常情况下应该能够连接成功，分配正常的IP。

论坛对图片支持得不是太好.  客户端remote那行,写服务器的域名也可(hosts文件)

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