vsftpd服务器配置

环境：CentOS_6.8_x86_64

要求：仅允许虚拟用户登录vsftpd服务器，并且有增删查改的权限，禁止系统本地用户登录、禁止匿名用户登录

第一步、yum安装vsftpd

# yum -y install vsftpd

# yum -y install db4-utils

第二步、建立虚拟用户

#vim /etc/vsftpd/login.txt

user1

password1

user2

password2

user3

password3

格式为第一行为用户名，第二行为密码，然后类推

第三步、建立db数据库，同时只有root用户才能读写

# db_load -T -t hash -f /etc/vsftpd/login.txt /etc/vsftpd/vsftpd_login.db

# chmod 777 /etc/vsftpd/vsftpd_login.db

配置pam文件

# vim /etc/pam.d/vsftpd?(64位系统)

将原来内容注释掉：

# session    optional     pam_keyinit.so    force revoke

# auth       required pam_listfile.so item=user sense=deny file=/etc/vsftpd/ftpusers onerr=succeed

# auth       required pam_shells.so

# auth       include password-auth

# account    include password-auth

# session    required     pam_loginuid.so

# session    include password-auth

auth       required    /lib64/security/pam_userdb.so db=/etc/vsftpd/vsftpd_login

account    required    /lib64/security/pam_userdb.so db=/etc/vsftpd/vsftpd_login

# vim /etc/pam.d/vsftpd (32位系统)

将原来内容注释掉：

#session    optional     pam_keyinit.so    force revoke

#auth       required pam_listfile.so item=user sense=deny file=/etc/vsftpd/ftpusers onerr=succeed

#auth       required pam_shells.so

#auth       include password-auth

#account    include password-auth

#session    required     pam_loginuid.so

#session    include password-auth

auth required /lib/security/pam_userdb.so db=/etc/vsftpd/vsftpd_login

account required /lib/security/pam_userdb.so db=/etc/vsftpd/vsftpd_login

第四步、建立虚拟用户对应的系统真实用户

useradd –d /home/www –s /sbin/nologin vm

chmod 700 /home/www

chown -R vm:vm /home/www

第五步、修改配置文件

# cp /etc/vsftpd/vsftpd.conf /etc/vsftpd/vsftpd.conf.bak

# vim vsftpd.conf

（具体配置文件讲解此处省略，最终修改的配置文件如下）:

# 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=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

#

# 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=300

#

# 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=NO

# (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=NO

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

listen_port=10021

#

# 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

tcp_wrappers=YES

guest_enable=YES

guest_username=vm

anon_world_readable_only=NO

anon_other_write_enable=YES

pasv_min_port=10051

pasv_max_port=10060

[[email protected] vsftpd]#

第六步、防火墙配置

# iptables -A INPUT -p tcp -m tcp --dport 10021 -j ACCEPT

# iptables -A INPUT -p tcp -m tcp --dport 20 -j ACCEPT

# iptables -A INPUT -p tcp -m tcp --dport 10051:10060 -j ACCEPT

# service iptables save

# service iptables restart

第七步、重启vsftpd服务，客户端用虚拟用户登录验证

# service vsftpd start