OpenVPN使用账户密码验证方式

默认openvpn是不提供账户密码的验证方式的，为了提高vpn的安全性，一般都会同时验证证书和账户名密码。

用账户名密码验证的原理：

1.使用密码文件做验证：在server端生成保存用户密码的文件，然后用户拨vpn的时候，server端调用检查用户名密码的脚本，这个脚本通过openvpn拿到用户名和密码之后，在密码文件中查找用户名，并比较密码，如果密码匹配，则通过验证。此方法配置比较简单，缺点是密码是明文的，可以随意添加更改

配置方法：

1.使用密码文件验证：

1）生成密码文件，并设置权限，确保openvpn的运行用户可以读取该文件

echo "fuzj fuzj123" >>psw-file

chmod 400 psw-file

chown nobody.nobody psw-file

2）下载验证使用的脚本，并设置执行权限

wget http://openvpn.se/files/other/checkpsw.sh

chmod a+x checkpsw.sh

3）修改server.conf，添加验证参数

script-security 3 # 加入脚本处理

auth-user-pass-verify /etc/openvpn/checkpsw.sh via-env # 指定使用的认证脚本

username-as-common-name # 使用客户提供的UserName作为Common Name

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

4）重启openvpn服务

/etc/init.d/openvpn restart

5）客户端添加使用用户名密码验证的参数

auth-user-pass

附： checkpsw.sh

   
   
    
    #!/bin/sh
    
    ###########################################################
    
    # checkpsw.sh (C) 2004 Mathias Sundman <[email protected]>
    
    #
    
    # 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

同样原理。也可以直接把用户名密码放库里面进行查询

   
   
    
    #!/bin/sh
    
    ###########################################################
    
    # checkpsw.sh (C) 2004 Mathias Sundman <[email protected]>
    
    #
    
    # 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.
    
    
    
    LOG_FILE="/var/log/openvpn/password.log"
    
    TIME_STAMP=`date "+%Y-%m-%d %T"`
    
    
    
    ###########################################################
    
    
    
    
    
    CORRECT_PASSWORD=`mysql -u guest -pguest -h 192.168.254.5 -P 3306 -e "select Password from sadb.user where Name='${username}';" | sed '/Password/d'`
    
    
    
    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 "$CORRECT_PASSWORD ${TIME_STAMP}: Incorrect password: username=\"${username}\", password=\"${password}\"." >> ${LOG_FILE}
    
    exit 1

来自为知笔记(Wiz)

OpenVPN使用账户密码验证方式

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