Command Center

How To Install and Configure VSFTP Server

1. Install VSFTPD service

[root@proxy /]# yum install vsftpd

Setting up Install Process

Setting up repositories

updates-released 100% |=========================| 951 B 00:00

Content-Length: 345

Date: Tue, 05 Feb 2008 01:32:49 GMT

Server: lighttpd/1.4.18

Trying other mirror.

http://ftp.lug.ro/fedora/linux/extras/4/i386/repodata/repomd.xml: [Errno 4] IOError: HTTP Error 404: Date: Tue, 05 Feb 2008 01:32:51 GMT

Server: Apache/2.0.54 (Debian GNU/Linux) PHP/4.3.10-22

Vary: accept-language,accept-charset

Accept-Ranges: bytes

Transfer-Encoding: chunked

Content-Type: text/html; charset=iso-8859-1

Content-Language: en

Trying other mirror.

extras 100% |=========================| 1.1 kB 00:00

base 100% |=========================| 1.1 kB 00:00

Reading repository metadata in from local files

Parsing package install arguments

Resolving Dependencies

--> Populating transaction set with selected packages. Please wait.

---> Downloading header for vsftpd to pack into transaction set.

vsftpd-2.0.3-1.i386.rpm 100% |=========================| 14 kB 00:00

---> Package vsftpd.i386 0:2.0.3-1 set to be updated

--> Running transaction check

Dependencies Resolved

=============================================================================

Package Arch Version Repository Size

=============================================================================

Installing:

vsftpd i386 2.0.3-1 base 123 k

Transaction Summary

=============================================================================

Install 1 Package(s)

Update 0 Package(s)

Remove 0 Package(s)

Total download size: 123 k

Is this ok [y/N]:y

Downloading Packages:

(1/1): vsftpd-2.0.3-1.i38 100% |=========================| 123 kB 00:04

Running Transaction Test

Finished Transaction Test

Transaction Test Succeeded

Running Transaction

Installing: vsftpd ######################### [1/1]

Installed: vsftpd.i386 0:2.0.3-1

Complete!

2. Check the service

# rpm –qa|grep vsftpd

# chkconfig –list vsftpd

# chkconfig vsftpd on

3. Check the config files

etc/vsftpd/vsftpd.conf

[root@proxy vsftpd]# more vsftpd.conf

# 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=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_enable=YES

pam_service_name=vsftpd

userlist_enable=YES

#enable for standalone mode

listen=YES

tcp_wrappers=YES

4. Anonymous download FTP server configuration: /etc/vsftpd/vsftpd.conf

The basic config is already set to anonymous download, no upload generally.

anonymous_enable=YES

in case you use passive and behind a firewall

pasv_min_port=6000

pasv_max_port=6001

5. Creating FTP site for users.

/etc/vsftpd/vsftd.conf

anonymous_enable=NO # This will disable anonymous login

chroot_local_user=YES # Security purposes, jail users

6. Checking the logs

/etc/vsftpd/vsftpd.conf

xferlog_file=/var/log/vsftpd.log # uncomment this to put your logs on /var/log/vsftpd.log

#xferlog_std_format=YES # comment this to have a readable log format

[root@proxy log]# tail -f vsftpd.log

Tue Feb 5 03:35:32 2008 [pid 9651] CONNECT: Client "203.189.11.5"

Tue Feb 5 03:35:33 2008 [pid 9650] [user1] OK LOGIN: Client "203.189.xxx.5"

Tue Feb 5 03:35:47 2008 [pid 9652] [user1] OK DELETE: Client "203.189.xxx.5", "/YServer.txt"

Tue Feb 5 03:36:02 2008 [pid 9652] [user1] OK UPLOAD: Client "203.189.xxx.5", "/boot.ini", 211 bytes, 13.03Kbyte/se

7. For passive configuration, this will limit the connection.

pasv_min_port=6000

pasv_max_port=6001

-A INPUT -s 203.189.xxx.0/255.255.255.0 -i eth0 -p tcp -m state --state NEW -m tcp --dport 6000 -j ACCEPT

-A INPUT -s 203.189.xxx.0/255.255.255.0 -i eth0 -p tcp -m state --state NEW -m tcp --dport 6001 -j ACCEPT

8. Common FTP Commands