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  • vsftpd建立虚拟用户FTP服务器教程

    教程作者:佚名    教程来源:不详   教程栏目:FTP服务器教程    收藏本页
                  摘要: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

    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_e

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