vsftpd基于mysql实现用户认证

博主： cto.wang
发布时间：2015 年 10 月 22 日
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分类： LINUX

一、前言
&nbsp; ftp介绍：
&nbsp; &nbsp; ftp全程是File Transfer Protocol(文件传输协议），方便于实文件交换；但是在文件传输以及账号密码发送时都是以明文传输，因此是一个明文协议
ftp是C/S方式：
&nbsp; 常见的客户端有：
&nbsp; &nbsp; GUI方式：browers、FileZilla-client、FlashFXP、CuteFTP、GFTP
&nbsp; &nbsp; CLI方式: lftp、wget、curl、lftpget&nbsp;
&nbsp; 常见的服务器端：
&nbsp; &nbsp; WU-FTPD、ProFTPD、pureftp、vsftp、Serv-U、FileZilla-server
vsftp介绍：
&nbsp; &nbsp;vsftp全程是Very Secure FTP(非常安全的ftp），它的最大优势就是非常安全（当然这是自己说的）；是基于GPL发部的在linux或Unix上的ftp服务器软件
&nbsp; 监听端口：监听在TCP的21号端口
&nbsp; 连接类型：
&nbsp; &nbsp; 命令连接：实现命令传输的连接，文件管理类命令，始终处于连接状态
&nbsp; &nbsp; 数据连接：数据的传输，按需创建，有两种工作模式，分别是主动模式和被动模式
&nbsp; &nbsp; &nbsp; 主动模式：客户端通过TCP的三层握手，与服务器端建立命令连接，命令连接建立后，服务器会主动通过tcp的20端口去连接客户端发送数据，默认去连接客户端建立命令连接端口+1端口，（如：客户端使用4001端口建立命令连接，则服务器端会主动去连接客户的4002端口，如果端口被占用，继续+1，依次类推）
&nbsp; &nbsp; &nbsp; &nbsp;<img src="//cto.wang/usr/uploads/2016/07/20160703160443-77.png" title="1433927172109821.png" alt="ftp1.png" />
&nbsp; &nbsp; &nbsp; &nbsp;被动模式：客户端通过tcp的三次握手，与服务器端建立命令连接，命令连接建立后，服务器端通过命令连接告知客户端自己已打开数据传输端口，客户端收到信息后，通过请求服务器端告知的端口获得数据；
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<img src="//cto.wang/usr/uploads/2016/07/20160703160443-61.png" title="1433927864111165.png" alt="ftp2.png" />
&nbsp; &nbsp; &nbsp;&nbsp;
&nbsp; &nbsp; &nbsp;
&nbsp; 数据传输格式有两种：
&nbsp; &nbsp; &nbsp;文本数据传输：ASCII
&nbsp; &nbsp; &nbsp;二进制数据：BINARY
&nbsp; ftp响应码：
&nbsp; &nbsp; 1xx: 信息类
&nbsp; &nbsp; 2xx：成功类信息
&nbsp; &nbsp; 3xx: 提示需要进一步补全内容类
&nbsp; &nbsp; 4xx: 客户端错误
&nbsp; &nbsp; 5xx：服务器端错误
&nbsp; 用户认证：用户通过ftp协议访问自己的家目录中的数据，可以通过ftp便览整个文件系统，为了安全起见将用户禁锢在家目录中&nbsp;
&nbsp; &nbsp; 匿名用户认证：映射为一个系统用户ftp，为ftp用户设置权限
&nbsp; &nbsp; OS用户：通过nsswitch服务解决用户名称解析，通过pam对系统用户进行认证（/etc/passwd,/etc/shadow）
&nbsp; &nbsp; 虚拟用户：映射为系统某一用户，用户账号密码存储于非/etc/passwd,/etc/shadow

&nbsp; &nbsp; &nbsp;
&nbsp;&nbsp;
二、基于Centos6.6下的vsftp软件包介绍
&nbsp; 启动脚本：/etc/rc.d/init.d/vsftpd
&nbsp; 用户控制文件：/etc/vsftpd/ftpusers
&nbsp; 配置文件：/etc/vsftpd/vsftpd.conf
vsftpd配置文件介绍 :
<pre class="brush:bash;toolbar:false;">#&nbsp;Example&nbsp;config&nbsp;file&nbsp;/etc/vsftpd/vsftpd.conf
#
#&nbsp;The&nbsp;default&nbsp;compiled&nbsp;in&nbsp;settings&nbsp;are&nbsp;fairly&nbsp;paranoid.&nbsp;This&nbsp;sample&nbsp;file
#&nbsp;loosens&nbsp;things&nbsp;up&nbsp;a&nbsp;bit,&nbsp;to&nbsp;make&nbsp;the&nbsp;ftp&nbsp;daemon&nbsp;more&nbsp;usable.
#&nbsp;Please&nbsp;see&nbsp;vsftpd.conf.5&nbsp;for&nbsp;all&nbsp;compiled&nbsp;in&nbsp;defaults.
#
#&nbsp;READ&nbsp;THIS:&nbsp;This&nbsp;example&nbsp;file&nbsp;is&nbsp;NOT&nbsp;an&nbsp;exhaustive&nbsp;list&nbsp;of&nbsp;vsftpd&nbsp;options.
#&nbsp;Please&nbsp;read&nbsp;the&nbsp;vsftpd.conf.5&nbsp;manual&nbsp;page&nbsp;to&nbsp;get&nbsp;a&nbsp;full&nbsp;idea&nbsp;of&nbsp;vsftpd&#039;s
#&nbsp;capabilities.
#
#&nbsp;Allow&nbsp;anonymous&nbsp;FTP?&nbsp;(Beware&nbsp;-&nbsp;allowed&nbsp;by&nbsp;default&nbsp;if&nbsp;you&nbsp;comment&nbsp;this&nbsp;out).
anonymous_enable=YES&nbsp;&nbsp;\\启用匿名用户
#&nbsp;Uncomment&nbsp;this&nbsp;to&nbsp;allow&nbsp;local&nbsp;users&nbsp;to&nbsp;log&nbsp;in.
local_enable=YES&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\\启用本地用户
#
#&nbsp;Uncomment&nbsp;this&nbsp;to&nbsp;enable&nbsp;any&nbsp;form&nbsp;of&nbsp;FTP&nbsp;write&nbsp;command.
write_enable=YES&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\\允许用户有写入的权限&nbsp;&nbsp;
#
#&nbsp;Default&nbsp;umask&nbsp;for&nbsp;local&nbsp;users&nbsp;is&nbsp;077.&nbsp;You&nbsp;may&nbsp;wish&nbsp;to&nbsp;change&nbsp;this&nbsp;to&nbsp;022,
#&nbsp;if&nbsp;your&nbsp;users&nbsp;expect&nbsp;that&nbsp;(022&nbsp;is&nbsp;used&nbsp;by&nbsp;most&nbsp;other&nbsp;ftpd&#039;s)
local_umask=022&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\\上传后文件的umask，也就是上传后文件的权限
#
#&nbsp;Uncomment&nbsp;this&nbsp;to&nbsp;allow&nbsp;the&nbsp;anonymous&nbsp;FTP&nbsp;user&nbsp;to&nbsp;upload&nbsp;files.&nbsp;This&nbsp;only
#&nbsp;has&nbsp;an&nbsp;effect&nbsp;if&nbsp;the&nbsp;above&nbsp;global&nbsp;write&nbsp;enable&nbsp;is&nbsp;activated.&nbsp;Also,&nbsp;you&nbsp;will
#&nbsp;obviously&nbsp;need&nbsp;to&nbsp;create&nbsp;a&nbsp;directory&nbsp;writable&nbsp;by&nbsp;the&nbsp;FTP&nbsp;user.
#anon_upload_enable=YES&nbsp;&nbsp;\\是否允许匿名用户上传文件，[YES&nbsp;|&nbsp;NO]
#
#&nbsp;Uncomment&nbsp;this&nbsp;if&nbsp;you&nbsp;want&nbsp;the&nbsp;anonymous&nbsp;FTP&nbsp;user&nbsp;to&nbsp;be&nbsp;able&nbsp;to&nbsp;create
#&nbsp;new&nbsp;directories.
#anon_mkdir_write_enable=YES&nbsp;&nbsp;\\是否允许匿名用户有创建目录的权限&nbsp;[YES&nbsp;|&nbsp;NO]
#
#&nbsp;Activate&nbsp;directory&nbsp;messages&nbsp;-&nbsp;messages&nbsp;given&nbsp;to&nbsp;remote&nbsp;users&nbsp;when&nbsp;they
#&nbsp;go&nbsp;into&nbsp;a&nbsp;certain&nbsp;directory.
dirmessage_enable=YES&nbsp;&nbsp;\\是否启动消息目录&nbsp;[YES&nbsp;|&nbsp;NO]
#
#&nbsp;The&nbsp;target&nbsp;log&nbsp;file&nbsp;can&nbsp;be&nbsp;vsftpd_log_file&nbsp;or&nbsp;xferlog_file.
#&nbsp;This&nbsp;depends&nbsp;on&nbsp;setting&nbsp;xferlog_std_format&nbsp;parameter
xferlog_enable=YES&nbsp;&nbsp;\\是否启用xferlog日志&nbsp;[YES&nbsp;|&nbsp;NO]
#
#&nbsp;Make&nbsp;sure&nbsp;PORT&nbsp;transfer&nbsp;connections&nbsp;originate&nbsp;from&nbsp;port&nbsp;20&nbsp;(ftp-data).
connect_from_port_20=YES&nbsp;&nbsp;\\设置主动连接的数据传输端口&nbsp;
#
#&nbsp;If&nbsp;you&nbsp;want,&nbsp;you&nbsp;can&nbsp;arrange&nbsp;for&nbsp;uploaded&nbsp;anonymous&nbsp;files&nbsp;to&nbsp;be&nbsp;owned&nbsp;by
#&nbsp;a&nbsp;different&nbsp;user.&nbsp;Note!&nbsp;Using&nbsp;&quot;root&quot;&nbsp;for&nbsp;uploaded&nbsp;files&nbsp;is&nbsp;not
#&nbsp;recommended!
#chown_uploads=YES&nbsp;\\是否启动上传ftp文件后，更改文件的属主&nbsp;[YES&nbsp;|&nbsp;NO]&nbsp;
#chown_username=whoever&nbsp;\\若启用了更改上传文件的属主，则定义是哪一个属主
#
#&nbsp;The&nbsp;name&nbsp;of&nbsp;log&nbsp;file&nbsp;when&nbsp;xferlog_enable=YES&nbsp;and&nbsp;xferlog_std_format=YES
#&nbsp;WARNING&nbsp;-&nbsp;changing&nbsp;this&nbsp;filename&nbsp;affects&nbsp;/etc/logrotate.d/vsftpd.log
#xferlog_file=/var/log/xferlog&nbsp;&nbsp;\\定义xferlog日志文件的存放位置
#
#&nbsp;Switches&nbsp;between&nbsp;logging&nbsp;into&nbsp;vsftpd_log_file&nbsp;and&nbsp;xferlog_file&nbsp;files.
#&nbsp;NO&nbsp;writes&nbsp;to&nbsp;vsftpd_log_file,&nbsp;YES&nbsp;to&nbsp;xferlog_file
xferlog_std_format=YES&nbsp;&nbsp;\\是否使用标准的xferlog模式&nbsp;[YES&nbsp;|&nbsp;NO]
#&nbsp;
#&nbsp;You&nbsp;may&nbsp;change&nbsp;the&nbsp;default&nbsp;value&nbsp;for&nbsp;timing&nbsp;out&nbsp;an&nbsp;idle&nbsp;session.
#idle_session_timeout=600&nbsp;&nbsp;\\设置会话超时时间
#
#&nbsp;You&nbsp;may&nbsp;change&nbsp;the&nbsp;default&nbsp;value&nbsp;for&nbsp;timing&nbsp;out&nbsp;a&nbsp;data&nbsp;connection.
#data_connection_timeout=120&nbsp;\\设置数据传输超时时间
#
#&nbsp;It&nbsp;is&nbsp;recommended&nbsp;that&nbsp;you&nbsp;define&nbsp;on&nbsp;your&nbsp;system&nbsp;a&nbsp;unique&nbsp;user&nbsp;which&nbsp;the
#&nbsp;ftp&nbsp;server&nbsp;can&nbsp;use&nbsp;as&nbsp;a&nbsp;totally&nbsp;isolated&nbsp;and&nbsp;unprivileged&nbsp;user.
#nopriv_user=ftpsecure&nbsp;&nbsp;\\运行vsftpd需要非特权系统用户，默认是nobody
#
#&nbsp;Enable&nbsp;this&nbsp;and&nbsp;the&nbsp;server&nbsp;will&nbsp;recognise&nbsp;asynchronous&nbsp;ABOR&nbsp;requests.&nbsp;Not
#&nbsp;recommended&nbsp;for&nbsp;security&nbsp;(the&nbsp;code&nbsp;is&nbsp;non-trivial).&nbsp;Not&nbsp;enabling&nbsp;it,
#&nbsp;however,&nbsp;may&nbsp;confuse&nbsp;older&nbsp;FTP&nbsp;clients.
#async_abor_enable=YES&nbsp;&nbsp;\\设置是否允许执行特殊的ftp命令async&nbsp;ABOR
#
#&nbsp;By&nbsp;default&nbsp;the&nbsp;server&nbsp;will&nbsp;pretend&nbsp;to&nbsp;allow&nbsp;ASCII&nbsp;mode&nbsp;but&nbsp;in&nbsp;fact&nbsp;ignore
#&nbsp;the&nbsp;request.&nbsp;Turn&nbsp;on&nbsp;the&nbsp;below&nbsp;options&nbsp;to&nbsp;have&nbsp;the&nbsp;server&nbsp;actually&nbsp;do&nbsp;ASCII
#&nbsp;mangling&nbsp;on&nbsp;files&nbsp;when&nbsp;in&nbsp;ASCII&nbsp;mode.
#&nbsp;Beware&nbsp;that&nbsp;on&nbsp;some&nbsp;FTP&nbsp;servers,&nbsp;ASCII&nbsp;support&nbsp;allows&nbsp;a&nbsp;denial&nbsp;of&nbsp;service
#&nbsp;attack&nbsp;(DoS)&nbsp;via&nbsp;the&nbsp;command&nbsp;&quot;SIZE&nbsp;/big/file&quot;&nbsp;in&nbsp;ASCII&nbsp;mode.&nbsp;vsftpd
#&nbsp;predicted&nbsp;this&nbsp;attack&nbsp;and&nbsp;has&nbsp;always&nbsp;been&nbsp;safe,&nbsp;reporting&nbsp;the&nbsp;size&nbsp;of&nbsp;the
#&nbsp;raw&nbsp;file.
#&nbsp;ASCII&nbsp;mangling&nbsp;is&nbsp;a&nbsp;horrible&nbsp;feature&nbsp;of&nbsp;the&nbsp;protocol.
#ascii_upload_enable=YES&nbsp;&nbsp;\\设置是否使用ascii码上传文件&nbsp;[YES&nbsp;|&nbsp;NO]
#ascii_download_enable=YES&nbsp;\\设置是否使用ascii码下载文件&nbsp;[YES&nbsp;|&nbsp;NO]
#
#&nbsp;You&nbsp;may&nbsp;fully&nbsp;customise&nbsp;the&nbsp;login&nbsp;banner&nbsp;string:
#ftpd_banner=Welcome&nbsp;to&nbsp;blah&nbsp;FTP&nbsp;service.&nbsp;\\设置定义登录ftp的欢迎语
#
#&nbsp;You&nbsp;may&nbsp;specify&nbsp;a&nbsp;file&nbsp;of&nbsp;disallowed&nbsp;anonymous&nbsp;e-mail&nbsp;addresses.&nbsp;Apparently
#&nbsp;useful&nbsp;for&nbsp;combatting&nbsp;certain&nbsp;DoS&nbsp;attacks.
#deny_email_enable=YES&nbsp;&nbsp;\\设置是否禁止匿名用户使用某些邮件地址
#&nbsp;(default&nbsp;follows)
#banned_email_file=/etc/vsftpd/banned_emails&nbsp;&nbsp;\\邮件地址文件
#
#&nbsp;You&nbsp;may&nbsp;specify&nbsp;an&nbsp;explicit&nbsp;list&nbsp;of&nbsp;local&nbsp;users&nbsp;to&nbsp;chroot()&nbsp;to&nbsp;their&nbsp;home
#&nbsp;directory.&nbsp;If&nbsp;chroot_local_user&nbsp;is&nbsp;YES,&nbsp;then&nbsp;this&nbsp;list&nbsp;becomes&nbsp;a&nbsp;list&nbsp;of
#&nbsp;users&nbsp;to&nbsp;NOT&nbsp;chroot().
#chroot_local_user=YES&nbsp;&nbsp;\\将所有的本地用户禁锢在家目录
#chroot_list_enable=YES&nbsp;&nbsp;\\设置是否启用将部分用户禁锢在家目录&nbsp;&nbsp;
#&nbsp;(default&nbsp;follows)
#chroot_list_file=/etc/vsftpd/chroot_list&nbsp;&nbsp;\\设置禁锢用户在家目录的用户列表
#
#&nbsp;You&nbsp;may&nbsp;activate&nbsp;the&nbsp;&quot;-R&quot;&nbsp;option&nbsp;to&nbsp;the&nbsp;builtin&nbsp;ls.&nbsp;This&nbsp;is&nbsp;disabled&nbsp;by
#&nbsp;default&nbsp;to&nbsp;avoid&nbsp;remote&nbsp;users&nbsp;being&nbsp;able&nbsp;to&nbsp;cause&nbsp;excessive&nbsp;I/O&nbsp;on&nbsp;large
#&nbsp;sites.&nbsp;However,&nbsp;some&nbsp;broken&nbsp;FTP&nbsp;clients&nbsp;such&nbsp;as&nbsp;&quot;ncftp&quot;&nbsp;and&nbsp;&quot;mirror&quot;&nbsp;assume
#&nbsp;the&nbsp;presence&nbsp;of&nbsp;the&nbsp;&quot;-R&quot;&nbsp;option,&nbsp;so&nbsp;there&nbsp;is&nbsp;a&nbsp;strong&nbsp;case&nbsp;for&nbsp;enabling&nbsp;it.
#ls_recurse_enable=YES&nbsp;&nbsp;\\是否允许递归&nbsp;[YES&nbsp;|&nbsp;NO]
#
#&nbsp;When&nbsp;&quot;listen&quot;&nbsp;directive&nbsp;is&nbsp;enabled,&nbsp;vsftpd&nbsp;runs&nbsp;in&nbsp;standalone&nbsp;mode&nbsp;and
#&nbsp;listens&nbsp;on&nbsp;IPv4&nbsp;sockets.&nbsp;This&nbsp;directive&nbsp;cannot&nbsp;be&nbsp;used&nbsp;in&nbsp;conjunction
#&nbsp;with&nbsp;the&nbsp;listen_ipv6&nbsp;directive.
listen=YES&nbsp;\\设置vsftpd是否处于监听状态
#
#&nbsp;This&nbsp;directive&nbsp;enables&nbsp;listening&nbsp;on&nbsp;IPv6&nbsp;sockets.&nbsp;To&nbsp;listen&nbsp;on&nbsp;IPv4&nbsp;and&nbsp;IPv6
#&nbsp;sockets,&nbsp;you&nbsp;must&nbsp;run&nbsp;two&nbsp;copies&nbsp;of&nbsp;vsftpd&nbsp;with&nbsp;two&nbsp;configuration&nbsp;files.
#&nbsp;Make&nbsp;sure,&nbsp;that&nbsp;one&nbsp;of&nbsp;the&nbsp;listen&nbsp;options&nbsp;is&nbsp;commented&nbsp;!!
#listen_ipv6=YES&nbsp;\\是否启用ipv6地址监听

guest_enable=YES&nbsp;\\是否启用来宾账号（默认没有）&nbsp;
guest_username=vuser&nbsp;\\将来宾账号映射为那一个系统用户（默认没有）
pam_service_name=vsftpd.mysql&nbsp;\\pam认证文件&nbsp;
user_config_dir=/etc/vsftpd/vuser_config\\设置匿名用户的权限配置文件位置&nbsp;（默认没有）
userlist_enable=YES&nbsp;&nbsp;\\此选项与下面选项userlit_deny都为YES时，/etc/vsftpd/user_list为黑名单，
userlist_deny=YES&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\\若userlist_enable为YES，userlist_deny=NO则此文件为白名单
tcp_wrappers=YES&nbsp;&nbsp;\\支持tcp_wrappers访问限制（/etc/{hosts.allow,hosts.deny}

max_clients=1024&nbsp;&nbsp;\\限制最大并发连接数（默认没有此选项）
max_per_ip=1024&nbsp;&nbsp;&nbsp;\\限制每个ip同时请求的连接数（默认没有此选项）
anon_max_rate=1024&nbsp;\\限制匿名用户的传输速率（默认没有此选项）
local_max_rate=1024&nbsp;\\限制本地用户的传输速率（默认没有出选项）</pre>

三、vsftpd+mysql+pam实现过程：
&nbsp; 1、创建用于vsftpd的数据库，在创建表，用于存储虚拟用户账号与密码
&nbsp; &nbsp;<img src="//cto.wang/usr/uploads/2016/07/20160703160443-75.png" title="1433412849801169.png" alt="F1.png" />
&nbsp;&nbsp;<img src="//cto.wang/usr/uploads/2016/07/20160703160443-25.png" title="1433412856592323.png" alt="f2.png" />
&nbsp; &nbsp;&nbsp;
&nbsp; 2、添加虚拟用户
<img src="//cto.wang/usr/uploads/2016/07/20160703160443-68.png" title="1433413087101336.png" alt="f3.png" />

&nbsp;3、授权admin用户对vuser表只有查询的权限
&nbsp;&nbsp;<img src="//cto.wang/usr/uploads/2016/07/20160703160444-18.png" title="1433413386575917.png" alt="f4.png" />
&nbsp;
&nbsp;4、创建虚拟用户的映射用户
&nbsp; &nbsp;<img src="//cto.wang/usr/uploads/2016/07/20160703160444-50.png" title="1433413567805653.png" alt="f5.png" />
&nbsp; &nbsp;
&nbsp;5、编辑/etc/vsftpd/vsftpd.conf，添加以下信息
&nbsp; &nbsp;<img src="//cto.wang/usr/uploads/2016/07/20160703160444-9.png" title="1433413761156343.png" alt="f6.png" />
&nbsp; &nbsp;&nbsp;
&nbsp;6、在/etc/pam.d/目中中创建vsftpd.mysql，内容如下
&nbsp; （1）确保安装pam_mysql之后生成了认证时所需要的共享库
<img src="//cto.wang/usr/uploads/2016/07/20160703160444-23.png" title="1433483922100106.png" alt="f9.png" />
&nbsp;&nbsp;
&nbsp;（2）在/etc/pam.d/目录中创建认证文件
<img src="//cto.wang/usr/uploads/2016/07/20160703160444-58.png" title="1433483947581925.png" alt="f8.png" />

7、重新启动vsftpd服务
&nbsp;<img src="//cto.wang/usr/uploads/2016/07/20160703160444-83.png" title="1433484140299626.png" alt="f10.png" /> &nbsp;

8、使用虚拟用户登录ftp，验证是否可以成功登录
&nbsp; <img src="//cto.wang/usr/uploads/2016/07/20160703160444-49.png" title="1433487650936619.png" alt="f11.png" />&nbsp;

&nbsp;9、为不同的虚拟用户设置不同的权限；
&nbsp; （1）修改/etc/vsftpd/vsftpd.conf 文件
&nbsp; &nbsp;<img src="//cto.wang/usr/uploads/2016/07/20160703160444-38.png" title="1433487888102731.png" alt="f12.png" />
&nbsp;
&nbsp; （2）默认是没有此目录的，需要手动创建
&nbsp; &nbsp;<img src="//cto.wang/usr/uploads/2016/07/20160703160444-8.png" title="1433487953140522.png" alt="f13.png" />
&nbsp;&nbsp;
&nbsp; （3）在此目录下，分别创建以tom，obama等用户为名称的文件，内容如下
&nbsp; &nbsp;&nbsp;<img src="//cto.wang/usr/uploads/2016/07/20160703160444-17.png" title="1433488275131496.png" alt="f14.png" />&nbsp;<img src="//cto.wang/usr/uploads/2016/07/20160703160444-27.png" title="1433488286594073.png" alt="f15.png" />
&nbsp;
&nbsp; （4）重启vsftpd服务，测试权限
&nbsp; &nbsp;<img src="//cto.wang/usr/uploads/2016/07/20160703160444-70.png" title="1433488964108851.png" alt="f16.png" />
&nbsp; &nbsp;<img src="//cto.wang/usr/uploads/2016/07/20160703160444-41.png" title="1433488977138969.png" alt="f17.png" />
&nbsp; &nbsp;<img src="//cto.wang/usr/uploads/2016/07/20160703160444-17-1.png" title="1433488990673521.png" alt="f18.png" />
&nbsp;(5)vsftpd已经实现基于mysql的认证，可以尽情使用了&nbsp;

最后修改：2021 年 12 月 10 日 10 : 53 AM

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