CentOS配置VSFTP服务器只能上传而不能下载

CentOS配置VSFTP服务器只能上传而不能下载

[1] 安装VSFTP

[root@localhost ~]# yum -y install vsftpd

[2] 配置vsftpd.conf文件

[root@localhost ~]# 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).    
#anonymous_enable=YES      
#    

# Uncomment this to allow local users to log in.    

local_enable=YES    

#    

# Uncomment this to enable any form of FTP write command.    

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)    

local_umask=022    

#    

# 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     #NO is not upload, YES is upload

download_enable=NO      #NO is not downalod, YES is download

# 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    

xferlog_enable=YES    

#    

# Make sure PORT transfer connections originate from port 20 (ftp-data).    

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    

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.    
ascii_upload_enable=YES      

ascii_download_enable=YES      

#    

# You may fully customise the login banner string:    
ftpd_banner=Welcome to lightnear 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().    
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.    

listen=YES    

#    

# This directive enables listening on IPv6 sockets. To listen on IPv4 and IPv6

# sockets, you must run two copies of vsftpd with two configuration files.    

# Make sure, that one of the listen options is commented !!    

#listen_ipv6=YES

pam_service_name=vsftpd    

userlist_enable=YES    
userlist_deny=NO      
local_root=/home/ftpuser      
tcp_wrappers=YES

use_localtime=YES

[3] 增加FTP帐户

[root@localhost ~]# useradd ftpuser -s /sbin/nologin
[root@localhost ~]# passwd ftpuser

[4] 编辑user_list文件，允许ftpuser用户访问FTP

[root@localhost ~]# vi /etc/vsftpd/user_list
# vsftpd userlist
# If userlist_deny=NO, only allow users in this file
# If userlist_deny=YES (default), never allow users in this file, and
# do not even prompt for a password.
# Note that the default vsftpd pam config also checks /etc/vsftpd/ftpusers
# for users that are denied.
root
bin
daemon
adm
lp
sync
shutdown
halt
mail
news
uucp
operator
games
nobody
ftpuser

[5] 建立我们的根目录，并设置访问权限

[root@localhost ~]# mkdir /home/ftpuser
[root@localhost ~]# chown -R ftpuser /home/ftpuser
[root@localhost ~]# chmod -R 755 /home/ftpuser

[6] 开启vsftpd服务

[root@localhost ~]# service vsftpd start
Starting vsftpd for vsftpd:                                [  OK  ]

[7] 默认开启vsftp服务

[root@localhost var]# chkconfig vsftpd on