Ubuntu下搭建多用戶多權限ftp

#1、切換root用戶模式 (已在root模式下的請忽略)

sudo -i

#然后提示你輸入當前用戶密碼，輸入密碼后回車后如果密碼正確控制台就變成root@***:/# 了。

#2、更新軟件源

apt-get update

#3、安裝 vsftpd

apt-get install vsftpd

 

#4.0、為了操作方便管理，我們給FTP創建自定義FTP目錄和用戶組

#4.1、創建FTP目錄  /home/ftp 當然你也可以創建到其它目錄

mkdir /home/ftp

#4.2、創建FTP用戶組 ftp-g  這個你們也可以用其它組名

groupadd ftp-g

#4.3、設置FTP目錄讀寫權限(注：用戶登陸的根目錄如果權限設置的太大會導致無法登陸，根目錄下的子目錄可以給很大的權限)

chmod 755 /home/ftp（一般服務器都是采用755權限）

#4.4、設置文件夾歸屬 root 以及 我們新建的 FTP用戶組

chown root:ftp-g /home/ftp

到此，ftp的根目錄就已經創建完成了

 

#5.0、設置FTP用戶目錄以及添加FTP用戶

#5.1、為用戶ftp_pub 創建目錄 pub並設置權限

mkdir /home/ftp/pub

chmod 755 /home/ftp/pub

#5.2、添加用戶 ftp_pub 並設置歸屬用戶組為 ftp-g 以及設置缺省目錄(FTP登陸目錄) -s /sbin/nologin 禁止用戶登陸控制台

useradd -g ftp-g -d /home/ftp/pub -s /sbin/nologin ftp_pub

#5.3、給新用戶 ftp_pub 設置密碼(無密碼不能登陸)

passwd ftp_pub

#然后按照提示輸入兩遍密碼 比如我們設置為 123456798

#5.4、更改目錄歸屬

chown ftp_pub:ftp-g /home/ftp/pub

此時，ftp下新建的這個目錄只有ftp_pub才能夠被更改

#5.5、增加上傳目錄不可刪除功能

在配置文件中增加user_config_dir=/etc/vsftpd_user_ctrl，同時在vsftpd_user_ctrl文件夾中增加對應的賬戶名字的文件，目的就是對指定的賬戶進行操作限制，比如：

增加的指令：

cmds_denied=DELE，就是防止刪除操作，同樣的指令操作還有很多，可以到網絡上面自行百度。

到此，就實現了普通用戶的操作限制，比如限制指定用戶刪除操作

 

#6、給FTP開放外網端口(默認:tcp端口 21)

ufw allow 21/tcp

#7、啟動FTP服務

/etc/init.d/vsftpd start

 

#8、普通用戶還是比較好搭建服務器，關鍵是管理員權限不好控制，看來是需要更加復雜的控制才行，需要通過單獨的文件進行控制，比如用vsftp的用戶控制或者用用戶的權限控制，比如登陸以后給與某個用戶超級，最后還是解決了超級管理員的問題，在星期四晚上的最后一刻，還是解決了超級管理員的問題，就是設置root可以登錄，同時登陸root賬戶，那么所有的文件權限也都有了。

 

下圖是vsftpd的配置文件配置對照表，嚴格按照下圖對配置文件進行修改

 

# Example config file /etc/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.

#

#

# Run standalone?  vsftpd can run either from an inetd or as a standalone

# daemon started from an initscript.

listen=YES

#

# This directive enables listening on IPv6 sockets. By default, listening

# on the IPv6 "any" address (::) will accept connections from both IPv6

# and IPv4 clients. It is not necessary to listen on *both* IPv4 and IPv6

# sockets. If you want that (perhaps because you want to listen on specific

# addresses) then you must run two copies of vsftpd with two configuration

# files.

listen_ipv6=NO

#

# Allow anonymous FTP? (Disabled by default).

anonymous_enable=NO

#

# 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

#

# 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

#

# If enabled, vsftpd will display directory listings with the time

# in  your  local  time  zone.  The default is to display GMT. The

# times returned by the MDTM FTP command are also affected by this

# option.

use_localtime=YES

#

# Activate logging of uploads/downloads.

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=root

#

# You may override where the log file goes if you like. The default is shown

# below.

xferlog_file=/var/log/vsftpd.log

#

# If you want, you can have your log file in standard ftpd xferlog format.

chown_uploads=YES

chown_username=root

#

# You may override where the log file goes if you like. The default is shown

# below.

xferlog_file=/var/log/vsftpd.log

#

# If you want, you can have your log file in standard ftpd xferlog format.

# Note that the default log file location is /var/log/xferlog in this case.

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

# 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 restrict local users to their home directories.  See the FAQ for

# the possible risks in this before using chroot_local_user or

# chroot_list_enable below.

#chroot_local_user=YES

#

# 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().

# (Warning! chroot'ing can be very dangerous. If using chroot, make sure that

# the user does not have write access to the top level directory within the

# 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

#

# Customization

#

# Some of vsftpd's settings don't fit the filesystem layout by

This option should be the name of a directory which is empty.  Also, the

# directory should not be writable by the ftp user. This directory is used

# as a secure chroot() jail at times vsftpd does not require filesystem

# access.

secure_chroot_dir=/var/run/vsftpd/empty

#

# This string is the name of the PAM service vsftpd will use.

pam_service_name=ftp

#

# This option specifies the location of the RSA certificate to use for SSL

# encrypted connections.

rsa_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem

rsa_private_key_file=/etc/ssl/private/ssl-cert-snakeoil.key

ssl_enable=NO

#

# Uncomment this to indicate that vsftpd use a utf8 filesystem.

utf8_filesystem=YES

user_config_dir=/etc/vsftpd_user_ctrl