centos 安裝 vsftpd

 

1 查看系統是否已經安裝vsftpd

 rpm -qa | grep vsftpd

 若是已經安裝 用命令 rpm -e  ssss 卸載

 

2 安裝 vsftpd

  yum -y install vsftpd

  chkconfig vsfptd on ## 設置開機啓動

  service vsftpd start ## 啓動服務

 

3 新增ftp的用戶

   useradd  -g ftp -M  -d /path  -s /sbin/nologin ftp_user 

    ######

     -g 表示所屬用戶組

     -M 表示不設置它的主目錄

     -d 表示設置ftp登陸初始化的路徑

     -s /sbin/nologin 表示不能夠用來系統登陸 

    ######

   

     passwd ftp_user ##設置 用戶的登陸密碼

     

4 vsftpd 配置文件修改

# 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).
# 是否容許匿名登陸
anonymous_enable=NO
#
# Uncomment this to allow local users to log in.
######容許本地用戶登陸
local_enable=YES
#
# Uncomment this to enable any form of FTP write command.
＃＃＃＃＃＃　本地用戶的寫權限
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)
＃＃＃＃＃＃　使用FTP的本地文件權限,默認爲077　　通常設置爲022
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
#
# 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
# 激活上傳/下載的日誌
xferlog_enable=YES
#
# Make sure PORT transfer connections originate from port 20 (ftp-data).
# 啓用FTP數據端口的數據鏈接
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
# 日誌文件路徑設置
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
# 使用標準的日誌格式
xferlog_std_format=YES
#
# You may change the default value for timing out an idle session.
# 用戶空閒超時,單位秒
idle_session_timeout=600
#
# You may change the default value for timing out a data connection.
# 數據鏈接空閒超時,單位秒
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 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().
###### 禁止ftp用戶鏈接之後切換目錄
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=NO
#
# 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
###### 該項參數配置參考以下說明
userlist_enable=YES
userlist_deny=NO
######
tcp_wrappers=YES
###### ftp鏈接的端口號
listen_port=2121

 

1 userlist_enable和userlist_deny兩個選項聯合起來針對的是：本地全體用戶（除去ftpusers中的用戶）和出如今user_list文件中的用戶以及
      不在在user_list文件中的用戶這三類用戶集合進行的設置。
2 當且僅當userlist_enable=YES時：userlist_deny項的配置纔有效，user_list文件纔會被使用；
  當其爲NO時，不管userlist_deny項爲什麼值都是無效的，本地全體用戶（除去ftpusers中的用戶）均可以登入FTP
3 當userlist_enable=YES時，userlist_deny=YES時：
   user_list是一個黑名單，即：全部出如今名單中的用戶都會被拒絕登入；
4  當userlist_enable=YES時，userlist_deny=NO時：
    user_list是一個白名單，即：只有出如今名單中的用戶纔會被准許登入(user_list以外的用戶都被拒絕登入)；另外須要特別提醒的是：
使用白名單後，匿名用戶將沒法登入！除非顯式在user_list中加入一行：anonymous

 

 

 

 

 4 防火牆新增 開放ftp的端口 

   -A INPUT -m state --state NEW -m tcp -p tcp --dport 2121 -j ACCEPT

   重啓防火牆

 關閉 selinux 

 

 5 重啓相對應的服務  測試鏈接