一、服务端配置
1、改动openvpn的主配置文件，加入例如以下内容
[root@ttt openvpn]# cat /etc/openvpn/server.conf |more
#########auth password########
script-security 3 ###--增加脚本处理，如用password验证
auth-user-pass-verify /etc/openvpn/checkpsw.sh via-env ###指定仅仅用的认证脚本
client-cert-not-required #####不请求客户的CA证书，使用User/Pass验证，假设同一时候启用证书和password认证，凝视掉该行
username-as-common-name ### 使用客户提供的UserName作为Common Name
############################
2、依照配置文件里的脚本路径放置checkpsw.sh
[root@ttt openvpn]# cat checkpsw.sh
#!/bin/sh
###########################################################
# checkpsw.sh (C) 2004 Mathias Sundman <mathias@openvpn.se>
#
# 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="/etc/openvpn/psw-file"
LOG_FILE="/var/log/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
3、赋予该脚本运行权限
[root@ttt openvpn]# chmod +x checkpsw.sh
4、准备username和password认证文件，username和password用空格隔开，同一时候确保openvpn启动用户可读取该文件
[root@ttt openvpn]# cat psw-file
client01 123456
client02 123456789
为了安全起见，将psw-file的权限尽量改小
[root@ttt openvpn]# chmod 400 psw-file
[root@ttt openvpn]# chown nobody.nobody psw-file
5、重新启动openvpn的服务进程
二、改动client的配置文件，加入以下一行
auth-user-pass
三、开启windowsclient，进行password认证