Linux - Slackware - 14.2 - 基本操作 - FTP サーバ

 
1. 概要
2. /etc/inetd.conf
3. /etc/vsftpd.conf

1. 概要

 動いていれば、特に書くつもりもなかったのですが・・・。

$ pgrep -lfa ftp
 いないわ。  パッケージのインストールが必要かと見てみれば

$ slackpkg search ftp

Looking for ftp in package list. Please wait... DONE

The list below shows all packages with name matching "ftp".

[ Status           ] [ Repository               ] [ Package                                  ]
   installed               slackware64                  gftp-2.0.19-x86_64-4
   installed               slackware64                  ncftp-3.2.5-x86_64-1
   installed               slackware64                  netkit-ftp-0.17-x86_64-2
   installed               slackware64                  obexftp-0.24-x86_64-1
   installed               slackware64                  tftp-hpa-5.2-x86_64-2
   installed               slackware64                  vsftpd-3.0.3-x86_64-3
  upgrade                  patches                      lftp-4.7.2-x86_64-1 --> lftp-4.8.4-x86_64-1_slack14.2
  upgrade                  patches                      proftpd-1.3.5b-x86_64-1 --> proftpd-1.3.5e-x86_64-1_slack14.2

You can search specific files using "slackpkg file-search file".
 あれま、そもそも vsftpd インストールされてますわん。  う~む、では、なぜ起動しておらぬ。

2. /etc/inetd.conf

 「Setup Linux ftp server - Install and configure vsftpd in Slackware | Linux basic configurations」を読んでなんとなく理解しました。

/etc/inetd.conf
 を編集せねばならぬようである。  うへぇ、さすが、なんて原始的なんだ。

# See "man 8 inetd" for more information.
#
# If you make changes to this file, either reboot your machine or send the
# inetd a HUP signal:
# Do a "ps x" as root and look up the pid of inetd. Then do a
# "kill -HUP <pid of inetd>".
# The inetd will re-read this file whenever it gets that signal.
#
# <service_name> <sock_type> <proto> <flags> <user> <server_path> <args>
#
# The first 4 services are really only used for debugging purposes, so
# we comment them out since they can otherwise be used for some nasty
# denial-of-service attacks.  If you need them, uncomment them.
# echo          stream  tcp     nowait  root    internal
# echo          dgram   udp     wait    root    internal
# discard       stream  tcp     nowait  root    internal
# discard       dgram   udp     wait    root    internal
# daytime       stream  tcp     nowait  root    internal
# daytime       dgram   udp     wait    root    internal
# chargen       stream  tcp     nowait  root    internal
# chargen       dgram   udp     wait    root    internal
time            stream  tcp     nowait  root    internal
time            dgram   udp     wait    root    internal
#
# These are standard services:
#
# Very Secure File Transfer Protocol (FTP) server.
#ftp     stream  tcp     nowait  root    /usr/sbin/tcpd  vsftpd
#
# Professional File Transfer Protocol (FTP) server.
#ftp     stream  tcp     nowait  root    /usr/sbin/tcpd  proftpd
 28行目のコメントをはずして、inetd を再起動ですかな。

$ /etc/rc.d/rc.inetd restart

3. /etc/vsftpd.conf

 クライアントから接続を試みると

ログインできません.
通信は暗号化されていません.
第三者にパスワードおよび内容を傍受される可能性があります.
ホスト 172.20.10.5 (172.20.10.5:21) に接続しています.
接続しました.
220 (vsFTPd 3.0.3)
>USER hogehoge
530 This FTP server is anonymous only.
ログインできません.
 てな、メッセージが出ましてな。  anonymous のみの接続になっているようで

/etc/vsftpd.conf
 の編集が必要なようです。  長くないので、全文掲載しますが

# 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				←	運用によって編集
#
# Uncomment this to allow local users to log in.
#local_enable=YES					←	運用によって編集
#
# Uncomment this to enable any form of FTP write command.
#write_enable=YES					←	運用によって編集
#
# 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.
# Note that the default log file location is /var/log/xferlog in this case.
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					←	運用によって編集
#ascii_download_enable=YES					←	運用によって編集
#
# 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().
# (Warning! chroot'ing can be very dangerous. If using chroot, make sure that
# the user does not have write access to the top level directory within the
# chroot)
#chroot_local_user=YES
#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 (rather
# than from inetd) and listens on IPv4 sockets. To use vsftpd in standalone
# mode rather than with inetd, change the line below to 'listen=YES'
# This directive cannot be used in conjunction with the listen_ipv6 directive.
listen=NO									←	運用によって編集
#
# 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							←	運用によって編集
#
# The seccomp sandbox feature adds an additional layer of security, but has
# been known to cause various problems depending on the kernel version.
# Problems may include kernel audit warnings in the system logs, or even
# failure to get a directory listing (or do much of anything in directories
# with enough files to trigger the issue).
# If you see errors like "OOPS: priv_sock_get_cmd" make sure this option is
# set to NO.  We'll set it to NO by default since we want a reliable ftpd.
seccomp_sandbox=NO
 「← 運用によって編集」とメモしたところに「#」をつけたり、はずしたり、「YES/NO」の記述を変更したりして、運用形態にあうように編集します。  わたしが、はまったのが

listen=NO
 の行で。  inetd 経由だと、このままにしておかないと、接続できないようです。  久々に触った inetd だからなぁ、知らんかったのか、忘れていたのか。  これで、inetd を再起動すると、思い通りに動くようになりましたわん。