根据 /etc/vsftpd/vsftpd.conf默认配置给出设定功能
# 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).
anonymous_enable=YES
允许匿名用户登录
# Uncomment this to allow local users to log in.
local_enable=YES
允许系统用户名登录
# Uncomment this to enable any form of FTP write command.
write_enable=YES
允许使用任何可以修改文件系统的FTP的指令
# 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)
local_umask=022
本地用户新增档案的权限
# 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
允许匿名用户上传文件
# Uncomment this if you want the anonymous FTP user to be able to create
# new directories.
#anon_mkdir_write_enable=YES
允许匿名用户创建新目录
# Activate directory messages - messages given to remote users when they
# go into a certain directory.
dirmessage_enable=YES
允许为目录配置显示信息,显示每个目录下面的message_file文件的内容
# Activate logging of uploads/downloads.
xferlog_enable=YES
开启日记功能
# Make sure PORT transfer connections originate from port 20 (ftp-data).
connect_from_port_20=YES
使用标准的20端口来连接ftp
# 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
所有匿名上传的文件的所属用户将会被更改成chown_username
#chown_username=whoever
匿名上传文件所属用户名
# You may override where the log file goes if you like. The default is shown
# below.
#xferlog_file=/var/log/vsftpd.log
日志文件位置
# If you want, you can have your log file in standard ftpd xferlog format
xferlog_std_format=YES
使用标准格式
# You may change the default value for timing out an idle session.
#idle_session_timeout=600
空闲连接超时
# You may change the default value for timing out a data connection.
#data_connection_timeout=120
数据传输超时
# 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
当服务器运行于最底层时使用的用户名
# 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
允许使用\"async ABOR\"命令,一般不用,容易出问题
# 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.
#ascii_upload_enable=YES
管控是否可用ASCII 模式上传。默认值为NO
#ascii_download_enable=YES
管控是否可用ASCII 模式下载。默认值为NO
# You may fully customise the login banner string:
#ftpd_banner=Welcome to blah FTP service.
login时显示欢迎信息.如果设置了banner_file则此设置无效
# You may specify a file of disallowed anonymous e-mail addresses. Apparently
# useful for combatting certain DoS attacks.
#deny_email_enable=YES
如果匿名用户需要密码,那么使用banned_email_file里面的电子邮件地址的用户不能登录
# (default follows)
#banned_email_file=/etc/vsftpd/banned_emails
禁止使用匿名用户登陆时作为密码的电子邮件地址
# 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().
#chroot_list_enable=YES
如果启动这项功能，则所有列在chroot_list_file中的使用者不能更改根目录
# (default follows)
#chroot_list_file=/etc/vsftpd/chroot_list
定义不能更改用户主目录的文件
# 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
是否能使用ls -R命令以防止浪费大量的服务器资源
# 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.
listen=YES
绑定到listen_port指定的端口,既然都绑定了也就是每时都开着的,就是那个什么
standalone模式
# 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
pam_service_name=vsftpd
定义PAM 所使用的名称，预设为vsftpd
userlist_enable=YES
若启用此选项,userlist_deny选项才被启动
tcp_wrappers=YES
开启tcp_wrappers支持
过滤掉那些注释，以便我们日后修改配置，大家可以删除vsftpd.conf内容，拷贝以下：
anonymous_enable=YES
local_enable=YES
write_enable=YES
local_umask=022
#anon_upload_enable=YES
#anon_mkdir_write_enable=YES
dirmessage_enable=YES
xferlog_enable=YES
connect_from_port_20=YES
#chown_uploads=YES
#chown_username=whoever
#xferlog_file=/var/log/vsftpd.log
xferlog_std_format=YES
#idle_session_timeout=600
#data_connection_timeout=120
#nopriv_user=ftpsecure
#async_abor_enable=YES
#ascii_upload_enable=YES
#ascii_download_enable=YES
#ftpd_banner=Welcome to blah FTP service.
#deny_email_enable=YES
#banned_email_file=/etc/vsftpd/banned_emails
#chroot_list_enable=YES
#chroot_list_file=/etc/vsftpd/chroot_list
#ls_recurse_enable=YES
listen=YES
#listen_ipv6=YES
pam_service_name=vsftpd
userlist_enable=YES
tcp_wrappers=YES