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Назад >> Сергей ШИБКА >> CentOS


30.08.2013 CentOC 6.x и VSFTP

Установка пакета VSFTPD:
yum install vsftpd

Добавляем пользователя для доступа:
useradd user1 -s /usr/sbin/nologin -d /home/user1/
-d домашняя директория (туда будет доступ при входе через ftp)
-s шелл (для ftp выставляеем nologin)


Устанавливаем пароль:
passwd user1

Открываем файл конфига /etc/vsftpd/vsftpd.conf и привод его к виду:

# 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=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 FTP.

#
# 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
chroot_local_user=YES
# (default follows)
#chroot_list_file=/etc/vsftpd/chroot_list
allow_writeable_chroot=YES

#
# 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 whith 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
force_dot_files=YES
hide_ids=YES
max_login_fails=3
vsftpd_log_file=/var/log/vsftpd/vsftpd.log



Прописываем сервис на запуск и запускаем его:
chkconfig vsftpd on
service vsftpd start


Прописываем правило в iptables:
-A RH-Firewall-1-INPUT -p tcp -m state -m tcp --dport 21 --state NEW -j ACCEPT

Для пассивного подключения в ftp сервису прописываем в /etc/sysconfig/iptables-config:
IPTABLES_MODULES="ip_conntrack_netbios_ns"
IPTABLES_MODULES="ip_conntrack_ftp"



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