布谷鸟

Solaris 10 X86自带的FTP是改进的WU-FTPD。例子配置文件如下：

# ident    "@(#)ftpaccess    1.2    03/05/14 SMI"
#
# FTP server configuration file, see ftpaccess(4).
#

class        realusers    real        *
class        guestusers    guest        *
class        anonusers    anonymous    *

loginfails    3
passwd-check    trivial        warn
private        no
shutdown    /etc/ftpd/shutdown.msg
# email        user@hostname
# guestuser    username
# rhostlookup    no

keepalive    yes
recvbuf        65536        real,guest,anonymous
sendbuf        65536        real,guest,anonymous
# flush-wait    no        anonymous
# passive    ports        0.0.0.0/0    32768    65535
# timeout    data        600
# timeout    idle        300

banner        /etc/ftpd/banner.msg
greeting    brief
message        /etc/ftpd/welcome.msg    login
message        .message        cwd=*
readme        README*            login
readme        README*            cwd=*
# quota-info    *

chmod        no        anonymous
delete        no        anonymous
overwrite    no        anonymous
rename        no        anonymous
umask        no        anonymous

compress    yes        realusers guestusers anonusers
tar        yes        realusers guestusers anonusers

path-filter    guest,anonymous    /etc/ftpd/filename.msg    ^[[:alnum:]._-]*$ ^[.-]

noretrieve    relative    class=anonusers        /
allow-retrieve    relative    class=anonusers        /pub

upload        class=anonusers    *    *      no  nodirs
# upload    class=anonusers    *    /incoming yes ftpadm ftpadm 0440 nodirs

# log        commands    real,guest,anonymous
# log        security    real,guest,anonymous
# log        transfers    real,guest,anonymous    inbound,outbound
# xferlog    format    %T %Xt %R %Xn %XP %Xy %Xf %Xd %Xm %U ftp %Xa %u %Xc %Xs %Xr

# limit-time    anonymous    30
# limit        anonusers    10    Wk0730-1800      /etc/ftpd/toomany.msg
# limit        anonusers    50    SaSu|Any1800-0730 /etc/ftpd/toomany.msg
restricted-uid    *
defumask    077    realusers    guestusers    anonusers

最后面的 restricted-uid    * 会把FTP用户目录限制在自己的主目录。

如果你安装的是VSFTPD，例子文件如下：

listen=YES
# 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 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 NetJSP 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
#

chroot_local_user=YES

# 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

userlist_enable=yes
userlist_deny=yes
userlist_file=/etc/vsftpd.ftpusers

pasv_enable=yes
pasv_min_port=10001
pasv_max_port=10500

其中chroot_local_user=YES会把FTP用户限制在其主目录。