安装部署：
CentOS 6.5
软件FQ官网下载
同步系统时间
yum install chrony -y service chronyd start && chronyc sources && chkconfig chronyd on 或 yum install ntpdate -y crontab添加 */1 * * * * /usr/sbin/ntpdate 0.rhel.pool.ntp.org > /dev/null 2>&1 service crond restart
安装依赖包
yum install epel-release -y && echo "sslverify=false">>/etc/yum.conf yum install openssl openssl-devel lzo lzo-devel pam pam-devel pam_mysql automake pkgconfig gcc gcc-c++
安装openvpn
cd /usr/local/src/ tar -zxvf openvpn-2.4.4.tar.gz cd openvpn-2.4.4 ./configure --prefix=/opt/openvpn make && make install cp -a sample/sample-config-files/server.conf /opt/openvpn/ #最好放在/opt/openvpn/下 cp -a distro/rpm/openvpn.init.d.rhel /etc/init.d/openvpn #创建启动脚本 ln -s /opt/openvpn/sbin/openvpn /usr/sbin/openvpn #启动脚本中会用到，也可以不执行此命令，直接在启动脚本中修改 vi /etc/init.d/openvpn #在85行，修改为：work=/opt/openvpn cd /opt/openvpn/ && mv server.conf server.conf.bak
vi server.conf #修改配置文件; ';'为注释 port 1195 #使用1195端口 proto tcp #使用tcp传输模式 dev tun #使用tun虚拟网卡设备（还有一种是Tap） ca keys/ca.crt #指定server端证书路径 cert keys/server.crt #指定server端证书路径 key keys/server.key #Thisfile should be kept secret dh keys/dh2048.pem tls-auth keys/ta.key 0 cipher AES-256-CBC server 10.8.0.0 255.255.255.0 #openvpn使用的网络 push "route 10.8.0.0 255.255.0.0" #添加openvpn路由 #push "route 0.0.0.0 0.0.0.0" ifconfig-pool-persist ipp.txt #客户端连入后使用的IP地址池 push "dhcp-option DNS 61.134.1.4" #客户端连入后使用的DNS push "dhcp-option DNS 223.5.5.5" keepalive 10 120 #保持VPN会话 comp-lzo #开启Lzo数据压缩 user nobody group nobody auth-user-pass-verify /opt/openvpn/checkpsw.sh via-env script-security 3 client-cert-not-required #不请求客户的CA证书，使用User/Pass验证，如果同时启用证书和密码认证，注释掉该行 username-as-common-name persist-key persist-tun verb 3 link-mtu 1500 #设置MTU连接数值 status logs/openvpn-status.log log logs/openvpn.log log-append logs/openvpn.log mkdir logs #创建日志目录 mkdir keys #创建key目录
[root@vpn ~]# openvpn --help | grep -A 5 script-security --script-security level mode : mode='execve' (default) or 'system', level= 0 -- strictly no calling of external programs 1 -- (default) only call built-ins such as ifconfig 2 -- allow calling of built-ins and scripts 3 -- allow password to be passed to scripts via env --shaper n : Restrict output to peer to n bytes per second.
安装easy-rsa，用来生成证书和密钥
cd /usr/local/src/ wget http://download.freenas.org/distfiles/easy-rsa-2.2.0_master.tar.gz #http://download.freenas.org/distfiles/ tar -zxvf easy-rsa-2.2.0_master.tar.gz cp -a easy-rsa-2.2.0_master/easy-rsa /opt/openvpn/ cd /opt/openvpn/easy-rsa/2.0/ mv vars vars.bak
vi vars #修改配置文件 export EASY_RSA="`pwd`" export OPENSSL="openssl" export PKCS11TOOL="pkcs11-tool" export GREP="grep" export KEY_CONFIG=`$EASY_RSA/whichopensslcnf $EASY_RSA` export KEY_DIR="$EASY_RSA/keys" echo NOTE: If you run ./clean-all, I will be doing a rm -rf on $KEY_DIR export PKCS11_MODULE_PATH="dummy" export PKCS11_PIN="dummy" export KEY_SIZE=2048 #修改为2048 export CA_EXPIRE=3650 export KEY_EXPIRE=3650 export KEY_COUNTRY="CN" #以下根据自己情况修改 export KEY_PROVINCE="ShaanXi" export KEY_CITY="XA" export KEY_ORG="yjz" export KEY_EMAIL="xx@yjz.cn" export KEY_CN=yjz export KEY_NAME=yjz export KEY_OU=yjz
ln -s openssl-1.0.0.cnf openssl.cnf
source vars #全局变量 ##生成证书，以下命令全部一直回车 ./clean-all #清空所有证书（keys目录下） ./build-ca #生成服务器ca证书 ./build-key-server server #生成服务端证书 ./build-dh #生成DH验证文件（dh2048.pem） openvpn --genkey --secret ta.key #降低DDoS风险 ./build-key client #生成客户端证书（建议以使用者命名）
设置外网访问
vim /etc/sysctl.conf #将net.ipv4.ip_forward = 0 改为 1 sysctl -p 配置nat表将vpn网段IP转发到server内网：很重要 iptables -t nat -A POSTROUTING -s 10.8.0.0/24 -o eth0 -j MASQUERADE #注意接口（eth0）是内网的接口，其它选项不要修改 iptables -A INPUT -p TCP --dport 1195 -j ACCEPT #开启防火墙1195端口 service iptables restart #POSTROUTING需要保存并重启服务才能生效 chkconfig iptables on
启动服务
#拷贝证书到/opt/openvpn/keys目录下 cd /opt/openvpn/easy-rsa/2.0/keys/ cp -a ca.crt server.crt dh2048.pem server.key /opt/openvpn/keys cd .. && cp ta.key /opt/openvpn/keys /etc/init.d/openvpn start chkconfig openvpn on
配置脚本+密码文件控制方式
下载脚本，根据具体配置修改红色部分
http://openvpn.se/files/other/checkpsw.sh #!/bin/sh ########################################################### # checkpsw.sh (C) 2004 Mathias Sundman# # This script will authenticate OpenVPN users against # a plain text file. The passfile should simply contain # one row per user with the username first followed by # one or more space(s) or tab(s) and then the password. PASSFILE="/opt/openvpn/psw-file" LOG_FILE="/opt/openvpn/logs/openvpn-password.log" TIME_STAMP=`date "+%Y-%m-%d %T"` ########################################################### if [ ! -r "${PASSFILE}" ]; then echo "${TIME_STAMP}: Could not open password file /"${PASSFILE}/" for reading." >> ${LOG_FILE} exit 1 fi CORRECT_PASSWORD=`awk '!/^;/&&!/^#/&&$1=="'${username}'"{print $2;exit}' ${PASSFILE}` if [ "${CORRECT_PASSWORD}" = "" ]; then echo "${TIME_STAMP}: User does not exist: username=/"${username}/", password=/"${password}/"." >> ${LOG_FILE} exit 1 fi if [ "${password}" = "${CORRECT_PASSWORD}" ]; then echo "${TIME_STAMP}: Successful authentication: username=/"${username}/"." >> ${LOG_FILE} exit 0 fi echo "${TIME_STAMP}: Incorrect password: username=/"${username}/", password=/"${password}/"." >> ${LOG_FILE} exit 1 touch /opt/openvpn/logs/openvpn-password.log chown nobody:nobody /opt/openvpn/logs/openvpn-password.log 密码存放方式 在psw-file里按”用户名[空格或者tab]密码“这种规则方式存放 touch /opt/openvpn/logs/psw-file chown nobody:nobody /opt/openvpn/psw-file cat /opt/openvpn/psw-file test test ipad ipad
windows客户端配置
下载：openvpn-install-2.4.4-I601.exe 点击安装，一直next，默认目录安装即可 一般会安装到 C:/Program Files/OpenVPN/ 目录下 创建client.ovpn文件： client dev tun proto tcp-client remote x.x.x.x 1195 #vpn服务端ip，这里为内网对应的公网IP，路由器映射至内网主机 remote-random resolv-retry infinite nobind persist-key persist-tun ca ca.crt auth-user-pass auth-nocache remote-cert-tls server tls-auth ta.key 1 cipher AES-256-CBC #保持服务端和客户端一致 comp-lzo status openvpn-status.log 将client.ovpn文件放到C:/Program Files/OpenVPN/config目录下
从VPN服务端下载ca.crt，ta.key证书 将ca.crt，ta.key证书放到C:/Program Files/OpenVPN/config目录下
点击桌面openvpn图标，输入相应的用户名密码即可
原创文章，作者：ItWorker，如若转载，请注明出处：https://blog.ytso.com/118593.html