Accesso FTP da remoto
Inviato: ven 24 mar 2006, 17:28
Utilizzo un PC desktop con su una Slackware current, kernel 2.6.15.3.
Più che altro la macchina viene utilizzata come File Server per un laptop che si connette in modalità wireless.
Bene, ho scelto vsftpd per gestire il mio server FTP; in locale va tutto bene, anche dal punto di vista della risoluzione dei nomi no problem, i guai cominciano quando cerco di connettermi da remoto, usando l'IP pubblico del router.
Premettendo che ho già aperto le porte 20 e 21 sul router, vi posto innanzitutto il mio vsftp.conf:
Bene, questo è quanto accade se avvio una sessione:
Come si può vedere, mi connetto tranquillamente (almeno all'inizio), ma non riesco a scaricare l'elenco delle directory.
Ho provato ad abilitare il "passive mode", ma la situazione non è cambiata di una virgola.
Qualche idea?
Burroughs.
Più che altro la macchina viene utilizzata come File Server per un laptop che si connette in modalità wireless.
Bene, ho scelto vsftpd per gestire il mio server FTP; in locale va tutto bene, anche dal punto di vista della risoluzione dei nomi no problem, i guai cominciano quando cerco di connettermi da remoto, usando l'IP pubblico del router.
Premettendo che ho già aperto le porte 20 e 21 sul router, vi posto innanzitutto il mio vsftp.conf:
Codice: Seleziona tutto
root@steely:/# 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 Burroughs' 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_enable=YES
#
# To run vsftpd in standalone mode (rather than through inetd), uncomment
# the line below.
#listen=YESCodice: Seleziona tutto
alutri@steely:~$ ftp xxx.www.yyy.zzz
Connected to xxx.www.yyy.zzz.
220 Welcome to Burroughs' FTP service
Name (xxx.www.yyy.zzz:alutri): anonymous
331 Please specify the password.
Password:
230 Login successful.
Remote system type is UNIX.
Using binary mode to transfer files.
ftp> ls
200 PORT command successful. Consider using PASV.
425 Failed to establish connection.Ho provato ad abilitare il "passive mode", ma la situazione non è cambiata di una virgola.
Qualche idea?
Burroughs.