Naudotojų draudimas jungtis prie serverio per SSH protokolą

Jei nenorime kad naudotojai turėtų galimybę jungtis prie serverio per SSH protokolą, viską darome pagal šį straipsnį. Šis straipsnis praves tiems, kas norės laikyti FTP serverį ir nenorės, kad naudotojai galėtų jungtis prie serverio per SSH protokolą.

1. Atsisiunčiame nano teksto redagavimo programą (nebūtina bet patogiau naudoti).

apt-get install nano

2. Atsidarome ssh serverio konfiguracinį failą su komanda

nano /etc/ssh/sshd_config

3. Atidaryto failo apačioje įrašome tokią komandą

AllowUsers root

po AllowUsers įrašome kokie naudotojai turės galimybę jungtis prie serverio per SSH protokolą, visi kiti naudotojai, kurių šiame saraše nebus negalės jungtis prie serverio per SSH protokolą.

Tarkime noriu kad prisijungimo galimybę per SSH turetų šie naudotojai: justas, tomas, root, mantas

tada įrašome šią komandą:

AllowUsers justas tomas root mantas

4.Išsaugome pakeitimus konfiguraciniame faile

spaudžiame ctrl+x tada raidę y ir klavišą enter.

5. perkrauname SSH servisą

/etc/init.d/ssh restart

 

Pati pirmoji interneto svetainė pasaulyje

Info.cern.ch was the address of the world’s first-ever web site and web server, running on a NeXT computer at CERN. The first web page address was http://info.cern.ch/hypertext/WWW/TheProject.html, which centred on information regarding the WWW project. Visitors could learn more about hypertext, technical details for creating their own webpage, and even an explanation on how to search the Web for information. There are no screenshots of this original page and, in any case, changes were made daily to the information available on the page as the WWW project developed. You may find a later copy (1992) on the World Wide Web Consortium website.

http://info.cern.ch

Laiko zonos keitimas

Ši komanda yra bendra visoms linux operacinėms sistemoms

ln -sf /usr/share/zoneinfo/Europe/Vilnius /etc/localtime

Debian operacinei sistemai

dpkg-reconfigure tzdata

 

LAMP Serverio konfiguraciniai failai silpniems serveriams

Su šiomis konfiguracijomis LAMP serveris puikiausiai veiks turint 256 RAM operatyviosios atminties. Būdėjimo rėžimu LAMP serveris naudos maždaug 50 RAM.

httpd.conf failas randasi /etc/apache2

StartServers 1
MinSpareServers 1
MaxSpareServers 1
ServerLimit 50
MaxClients 50
MaxRequestsPerChild 5000

my.cnf failas randasi /etc/mysql arba etc

[mysqld] user        = mysql
pid-file    = /var/run/mysqld/mysqld.pid
socket        = /var/run/mysqld/mysqld.sock
port        = 3306
basedir        = /usr
datadir        = /var/lib/mysql
tmpdir        = /tmp
language    = /usr/share/mysql/english
skip-external-locking
skip-innodb

bind-address        = 127.0.0.1

skip-locking
key_buffer = 16K
max_allowed_packet = 1M
table_cache = 4
sort_buffer_size = 64K
read_buffer_size = 256K
read_rnd_buffer_size = 256K
net_buffer_length = 2K
thread_stack = 64K
innodb_file_per_table = 1

[mysqldump] quick
max_allowed_packet = 16M

[mysql] no-auto-rehash

[isamchk] key_buffer = 8M
sort_buffer_size = 8M

[myisamchk] key_buffer = 8M
sort_buffer_size = 8M

[mysqlhotcopy] interactive-timeout

Ir pabaigai, jei naudojate phpmyadmin ir prisijungus jums rodo įspėjimus, kad

„Serveris veikia su Suhosin. Prašome perskaityti dokumentaciją dėl galimų problemų.“

Išjungiame Suhosin

suhosin.ini failas randasi /etc/php5/conf.d

Užkomentuojame antrą elutę

; configuration for php suhosin module
;extension=suhosin.so

ir pakeičiam suhosin.session.encrypt = on į

suhosin.session.encrypt = Off

Viską atlikus perkraunam mysql ir apache2 servisus

/etc/init.d/apache2 restart

/etc/init.d/mysql restart

 

vsftpd serverio vsftpd.conf konfiguracinis failas

# 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=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=0000
#
# 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
#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_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 and
# listens on IPv4 sockets. This directive cannot be used in conjunction
# with the listen_ipv6 directive.
listen=YES
#
# 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

file_open_mode=0777