FTP-Server



Details zum Server

IP-Adresse: 188.166.161.116

FQDN: ftp.go-solution.cloud

Servername: VSFTPD-01Neuer Benutzer erstellen

Um einen neuen Benutzer auf dem FTP-Server zu erstellen, müssen folgende Befehle ausgeführt werden:

#create user and enble ftp access

sudo useradd -s /bin/bash -m -p $(perl -e 'print crypt("Mu$TrFTPuSr", "password")' "Mu$TrFTPuSr") muster

echo 'muster:Mu$TrFTPuSr' | chpasswd

sudo mkdir /home/muster/ftp

sudo chown nobody:nogroup /home/muster/ftp

sudo chmod a-w /home/muster/ftp

#create directory for new files (folder for new files)

sudo mkdir /home/muster/ftp/files

sudo chown muster:muster /home/muster/ftp/files

#create directory for processed files (folder for pcrocessed files)

sudo mkdir /home/muster/ftp/files_processed

sudo chown muster:muster /home/muster/ftp/files_processed

Der folgende Befehl löscht den Benutzer wieder

deluser --remove-home muster

Installationsanleitung

Installation mit folgenden Befehlen:

#update package list

sudo apt update

#install vsftpd daemon & service

sudo apt install vsftpd

#copy original configuration file

sudo cp /etc/vsftpd.conf /etc/vsftpd.conf.orig

#configure firewall

sudo ufw allow 20,21,22,990/tcp

sudo ufw allow 40000:50000/tcp

sudo ufw enable

Konfigurationsdateien

Die Konfigurationsdatei ist unter dem Pfad "/etc/vsftpd.conf" verfügbar.

Um die Datei zu bearbeiten kann folgender Befehl genutzt werden:

nano /etc/vsftpd.conf

Nach einer Anpassung der Konfiguration muss der Service neu gestartet werden. Der folgende Befehl startet den Service neu:

sudo systemctl restart vsftpd

Das Konfigurationsfile für unseren Server ist:

# 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.

#

#

# Run standalone? vsftpd can run either from an inetd or as a standalone

# daemon started from an initscript.

listen=YES

#

# This directive enables listening on IPv6 sockets. By default, listening

# on the IPv6 "any" address (::) will accept connections from both IPv6

# and IPv4 clients. It is not necessary to listen on *both* IPv4 and IPv6

# sockets. If you want that (perhaps because you want to listen on specific

# addresses) then you must run two copies of vsftpd with two configuration

# files.

listen_ipv6=NO

#

# Allow anonymous FTP? (Disabled by default).

anonymous_enable=NO

#

# 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

#

# If enabled, vsftpd will display directory listings with the time

# in your local time zone. The default is to display GMT. The

# times returned by the MDTM FTP command are also affected by this

# option.

use_localtime=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

#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 restrict local users to their home directories. See the FAQ for

# the possible risks in this before using chroot_local_user or

# chroot_list_enable below.

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().

# (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

#

# Customization

#

# Some of vsftpd's settings don't fit the filesystem layout by

# default.

#

# This option should be the name of a directory which is empty. Also, the

# directory should not be writable by the ftp user. This directory is used

# as a secure chroot() jail at times vsftpd does not require filesystem

# access.

secure_chroot_dir=/var/run/vsftpd/empty

#

# This string is the name of the PAM service vsftpd will use.

pam_service_name=fm-gateway-sync-center

#

# This option specifies the location of the RSA certificate to use for SSL

# encrypted connections.

#rsa_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem

#rsa_private_key_file=/etc/ssl/private/ssl-cert-snakeoil.key

#ssl_enable=NO

# Paths to your letsencrypt files

rsa_cert_file=/etc/letsencrypt/live/ftp.go-solution.cloud/fullchain.pem

rsa_private_key_file=/etc/letsencrypt/live/ftp.go-solution.cloud/privkey.pem

ssl_enable=YES

allow_anon_ssl=NO

# Options to force all communications over SSL - why would you want to

# allow clear these days? Comment them out if you don't want to force

# SSL though

force_local_data_ssl=YES

force_local_logins_ssl=YES

ssl_tlsv1=YES

ssl_sslv2=NO

ssl_sslv3=NO

require_ssl_reuse=NO

ssl_ciphers=HIGH

#

# Uncomment this to indicate that vsftpd use a utf8 filesystem.

#utf8_filesystem=YES

# custom

user_sub_token=$USER

local_root=/home/$USER/ftp

pasv_min_port=40000

pasv_max_port=50000

SSL-Zertifikat

Für das SSL-Zertifikat wird Certbot im Zusammenhang mit Apache genutz.

Installation:

sudo apt-get update

sudo apt-get install apache2

sudo snap install --classic certbot

sudo ln -s /snap/bin/certbot /usr/bin/certbot

sudo certbot certonly --apache

In der Crontabelle ist eine monatliche Erneuerung des Zertifikats hinterlegt

0 0 1 * * sudo certbot renew --dry-run