默认CentOS安装后，不启用vsftpd，且版本过旧。

1.安装VSFTPD

yum install vsftpd

2.编辑配置文件

 # 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=NO
 #
 # Uncomment this if you want the anonymous FTP user to be able to create
 # new directories.
 anon_mkdir_write_enable=NO
 #
 # 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=NO
 #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/vsftpd-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 longxin 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_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
 #
 # 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
tcp_wrappers=YES

3.创建必需文件和启动服务

touch /etc/vsftpd/chroot_list
service vsftpd start
chkconfig vsftpd on

4.添加用户

vsftp默认使用系统用户, 现在添加用户ftpuser, 指向目录/home/ftpuser, 没有shell登录权限。

useradd ftpuser -d /home/ftpuser -s /sbin/nologin
passwd ftpuser

5.增加新建用户到chroot_list文件

echo "ftpuser" >> /etc/vsftpd/chroot_list
service vsftpd restart

6.给防火墙添加规则

iptables -I INPUT -p tcp -m state –state NEW -m tcp –dport 21 -j ACCEPT
iptables -I INPUT -p tcp -m state –state NEW -m tcp –dport 20 -j ACCEPT

vi /etc/sysconfig/iptables-config

IPTABLES_MODULES="ip_conntrack_ftp ip_nat_ftp ip_conntrack_netbios_ns"

7.测试

从客户端测试吧。

Last modified on 2010-04-29