CentOS 下基于本地用户的 vsftpd 服务配置

说明：

之前写过一篇《基于虚拟用户的 vsftpd 服务配置》，最终并没有采用这种方式使用FTP功能，原因为：

所有虚拟用户在实际操作文件时都会转化为同一个本地用户，如果其中一个虚拟FTP用户出现安全问题（比如上传一个php的phpspy文件管理器），所有的网站就都不安全了，因为在服务器上网站文件都属于同一个本地用户，可能是 www、apache、nobody、或自定义的用户。

最终使用了基本本地用户的VSFTPD，文件权限各自独立。

安装步骤如下：

1/4、安装vsftpd：

yum -y install vsftpd

2/4、修改pam文件“vi /etc/pam.d/vsftpd”：

注释掉所有内容，换为：

auth required pam_listfile.so item=user sense=deny file=/etc/vsftpd/ftpusers onerr=succeed
auth include system-auth
auth required pam_shells.so
account include system-auth
session include system-auth

3/4、添加本地用户：

useradd -s /bin/nologin -m -d /var/www/site/upall.cn -g ftp upall_cn
echo userPasswd | passwd lyfgz_com --stdin
# /bin/nologin 用于禁止期登录终端
# /var/www/site/upall.cn 是用户、网站的根目录
# ftp 是为用户分配的所属组
# upall_cn 是添加的用户名（登录FTP时的用户名）
# userPasswd 是用户密码（用来登录FTP）

4/4、修改vsfptd配置文件“vi /etc/vsftpd/vsftpd.conf”：

# Example config file /etc/vsftpd/vsftpd.conf
#
# The default compiled in settings are fairly paranoid. This sample file
# loosens things up a bit, to make the ftp daemon more usable.
# Please see vsftpd.conf.5 for all compiled in defaults.
#
# READ THIS: This example file is NOT an exhaustive list of vsftpd options.
# Please read the vsftpd.conf.5 manual page to get a full idea of vsftpd's
# capabilities.
#
# Allow anonymous FTP? (Beware - allowed by default if you comment this out).
# 关闭匿名用户
anonymous_enable=NO
#
# Uncomment this to allow local users to log in.
# 启用本地用户
local_enable=YES
#
# Uncomment this to enable any form of FTP write command.
# 允许写入
write_enable=YES
#
# Default umask for local users is 077. You may wish to change this to 022,
# if your users expect that (022 is used by most other ftpd's)
# 设置上传文件的权限（本人全权，他人无权（防止跨站捣蛋））
local_umask=077
#
# Uncomment this to allow the anonymous FTP user to upload files. This only
# has an effect if the above global write enable is activated. Also, you will
# obviously need to create a directory writable by the FTP user.
#anon_upload_enable=YES
#
# Uncomment this if you want the anonymous FTP user to be able to create
# new directories.
#anon_mkdir_write_enable=YES
#
# Activate directory messages - messages given to remote users when they
# go into a certain directory.
#dirmessage_enable=YES
#
# The target log file can be vsftpd_log_file or xferlog_file.
# This depends on setting xferlog_std_format parameter
# 启用日志
xferlog_enable=YES
#
# Make sure PORT transfer connections originate from port 20 (ftp-data).
# 使用20端口返回数据
connect_from_port_20=YES
#
# If you want, you can arrange for uploaded anonymous files to be owned by
# a different user. Note! Using "root" for uploaded files is not
# recommended!
#chown_uploads=YES
#chown_username=whoever
#
# The name of log file when xferlog_enable=YES and xferlog_std_format=YES
# WARNING - changing this filename affects /etc/logrotate.d/vsftpd.log
#xferlog_file=/var/log/xferlog
#
# Switches between logging into vsftpd_log_file and xferlog_file files.
# NO writes to vsftpd_log_file, YES to xferlog_file
# 使用标准格式的日志（有哪几种我也不清楚）
xferlog_std_format=YES
#
# You may change the default value for timing out an idle session.
#idle_session_timeout=600
#
# You may change the default value for timing out a data connection.
#data_connection_timeout=120
#
# It is recommended that you define on your system a unique user which the
# ftp server can use as a totally isolated and unprivileged user.
#nopriv_user=ftpsecure
#
# Enable this and the server will recognise asynchronous ABOR requests. Not
# recommended for security (the code is non-trivial). Not enabling it,
# however, may confuse older FTP clients.
#async_abor_enable=YES
#
# By default the server will pretend to allow ASCII mode but in fact ignore
# the request. Turn on the below options to have the server actually do ASCII
# mangling on files when in ASCII mode.
# Beware that on some FTP servers, ASCII support allows a denial of service
# attack (DoS) via the command "SIZE /big/file" in ASCII mode. vsftpd
# predicted this attack and has always been safe, reporting the size of the
# raw file.
# ASCII mangling is a horrible feature of the protocol.
# 关闭文本方式的传输（上传和下载，不关的的话ls会出size的错）
ascii_upload_enable=NO
ascii_download_enable=NO
#
# You may fully customise the login banner string:
#ftpd_banner=Welcome to blah FTP service.
#
# You may specify a file of disallowed anonymous e-mail addresses. Apparently
# useful for combatting certain DoS attacks.
#deny_email_enable=YES
# (default follows)
#banned_email_file=/etc/vsftpd/banned_emails
#
# You may specify an explicit list of local users to chroot() to their home
# directory. If chroot_local_user is YES, then this list becomes a list of
# users to NOT chroot().
# 限制用户在家目录（下边三行未注释是一起的。不能乱窜，chroot_list里的可以窜，一行一个用户名）
chroot_local_user=YES
chroot_list_enable=YES
# (default follows)
chroot_list_file=/etc/vsftpd/chroot_list
#
# You may activate the "-R" option to the builtin ls. This is disabled by
# default to avoid remote users being able to cause excessive I/O on large
# sites. However, some broken FTP clients such as "ncftp" and "mirror" assume
# the presence of the "-R" option, so there is a strong case for enabling it.
#ls_recurse_enable=YES
#
# When "listen" directive is enabled, vsftpd runs in standalone mode and 
# listens on IPv4 sockets. This directive cannot be used in conjunction 
# with the listen_ipv6 directive.
# 运行VSFTPD
listen=YES
#
# This directive enables listening on IPv6 sockets. To listen on IPv4 and IPv6
# sockets, you must run two copies of vsftpd whith two configuration files.
# Make sure, that one of the listen options is commented !!
#listen_ipv6=YES

# 帐号验证方式
pam_service_name=vsftpd
# 禁止列表中的用户登录（列表文件名/etc/vsftpd/user_list）
userlist_enable=YES
# 这项功能暂不清楚
tcp_wrappers=YES

＜完＞