vsftpd建立虚拟用户

vsftpd指定虚拟用户登录后，本地用户就不能登陆了

建立虚拟用户

[root@rhel4 opt]# cat << ! >logins.txt 说明：此文本文件的格式是：单数行为用户名，偶数行为密码

> upload

> 123456

> download

> 123456

> admin

> 123456

> !

[root@rhel4 opt]# db_load -T -t hash -f logins.txt /etc/vsftpd_login.db

[root@rhel4 opt]# chmod 600 /etc/vsftpd_login.db

[root@rhel4 opt]# cd /opt/vsftpd-1.2.1/EXAMPLE/VIRTUAL_USERS (进入解包的源码目录，把虚拟用户的认证文件拷贝到/etc/pam.d/下)

[root@rhel4 VIRTUAL_USERS]# cp vsftpd.pam /etc/pam.d/ftp.vu

(建立虚拟用户所要访问的ftp目录并设置仅virtual用户访问的权限和创建一个供下载实验的文件)

[root@rhel4 VIRTUAL_USERS]# mkdir /var/ftpsite

[root@rhel4 VIRTUAL_USERS]# useradd -d /var/ftpsite virtual;

[root@rhel4 VIRTUAL_USERS]# chmod 700 /var/ftpsite

[root@rhel4 VIRTUAL_USERS]# chown virtual /var/ftpsite

[root@rhel4 VIRTUAL_USERS]# su - virtual -c "echo hello >/var/ftpsite/test.file"

vi /etc/vsftpd.conf在此文件中插入下面的配置语句

guest_enable=YES（启用虚拟用户）

guest_username=virtual（将虚拟用户映射为本地virtual用户）

pam_service_name=ftp.vu（指定PAM配置文件为ftp.vu）

user_config_dir=/etc/vsftpd_user_conf（指定不同虚拟用户配置文件的存放路径）

[root@rhel4 VIRTUAL_USERS]# mkdir /etc/vsftpd_user_conf

h.开放不同用户的不同权限echo "anon_world_readable_only=NO"> /etc/vsftpd_user_conf/download（开放download用户的下载权限——只能下载；注意这个不地方不要写成YES，否则将不能列出文件和目录）

cp /etc/vsftpd_user_conf/download /etc/vsftpd_user_conf/upload

vi /etc/vsftpd_user_conf/upload，添加下列行

write_enable=YES （增加写权限）

anon_upload_enable=YES（增加上传权限）

anon_mkdir_write_enable=YES (增加创建目录的权限）

cp /etc/vsftpd_user_conf/upload /etc/vsftpd_user_conf/admin

增加一行：

anon_other_write_enable=YES（增加管理员用户的删除/重命名的权限）

i.测试

killall -9 vsftpd;/usr/local/sbin/vsftpd /etc/vsftpd.conf &

ftp 127.0.0.1 2121

以用户名download和你设置的密码登录，ls，可以看到文件，下载，成功！put一个文件，提示

Permission denied。rename test.file同样权限被拒绝；delete test.file同样不成功！

输入quit退出，以upload用户登录，OK！可以上传，下载，mkdir lsf，提示“/lsf" created；rename lsf lsf1提示Permission denied,删除文件同样不成功！

输入quit退出，以admin用户登录，可以有上述所有权限，然后rmdir lsf,提示Remove directory o [eration successful;delete test.file提示Delete operation successful!OK，大功告成了！

参考：

http://www.linuxts.com/modules/sections/index.php?op=printpage&artid=2206&PHPSESSID=e1a0ec323f0f75bc59cbb83afeeb59ff

http://www.uplinux.com/www/net/02/117.shtml

附

1.我的/etc/vsftpd.conf文件的内容

[root@rhel4 VIRTUAL_USERS]# cat /etc/vsftpd.conf

# 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.

#

# 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

#

# 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

#

# 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=whoever

#

# 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

#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 turning on ascii_download_enable enables malicious remote parties

# to consume your I/O resources, by issuing the command "SIZE /big/file" in

# ASCII mode.

# These ASCII options are split into upload and download because you may wish

# to enable ASCII uploads (to prevent uploaded scripts etc. from breaking),

# without the DoS risk of SIZE and ASCII downloads. ASCII mangling should be

# on the client anyway..

#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().

#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

guest_enable=YES

guest_username=virtual

pam_service_name=ftp.vu

user_config_dir=/etc/vsftpd_user_conf

max_clients=500

max_per_ip=50

local_max_rate=100000

anon_max_rate=10000

pasv_enable=yes

pasv_min_port=50000

pasv_max_port=60000

idle_session_timeout=600

data_connection_timeout=120

accept_timeout=60

connect_timeout=60

listen=YES

2.我的/etc/vsftpd_user_conf/download的内容

[root@rhel4 VIRTUAL_USERS]# cat /etc/vsftpd_user_conf/download

anon_world_readable_only=NO

3.我的/etc/vsftpd_user_conf/upload的内容

[root@rhel4 VIRTUAL_USERS]# cat /etc/vsftpd_user_conf/upload

anon_world_readable_only=NO

write_enable=YES

anon_upload_enable=YES

anon_mkdir_write_enable=YES

4.我的/etc/vsftpd_user_conf/admin的内容

[root@rhel4 VIRTUAL_USERS]# cat /etc/vsftpd_user_conf/admin

anon_world_readable_only=NO

write_enable=YES

anon_upload_enable=YES

anon_mkdir_write_enable=YES

anon_other_write_enable=YES