====== Сервис OSSEC ======

  * [[https://ru.wikipedia.org/wiki/OSSEC|OSSEC — Википедия]]
  * [[https://habr.com/ru/post/262479/|Инструкция: внедряем HIDS OSSEC]]
  * [[http://www.ossec.net/downloads.html|OSSEC Downloads]]

===== Debian =====

==== Подключение репозитория =====
<code>
# wget -q -O - https://updates.atomicorp.com/installers/atomic | bash

# apt install apt-transport-https

# apt update
</code>
==== Установка и запуск сервера ====
<code>
lan# apt install ossec-hids-server

lan# /var/ossec/bin/agent_control -l
...
</code>

==== Настройка сервера для подключения агента ====
<code>
lan# /var/ossec/bin/manage_agents
...
   (A)dd an agent (A).
...
Agent information:
   ID:001
   Name:server
   IP Address:192.168.X.10
...
   (E)xtract key for an agent (E).
...

lan# /var/ossec/bin/ossec-control restart

lan# ss -panu | grep 1514
</code>

==== Установка, запуск и подключение агента ====

=== Windows ===

  * [[https://www.ossec.net/docs/docs/manual/installation/installation-windows.html|Windows Agent Installation]]

=== Debian ===

<code>
server# apt install ossec-hids-agent

server# vim /var/ossec/etc/ossec.conf
</code><code>
<ossec_config>
  <client>
    <server-ip>192.168.100+X.10</server-ip>
...
</code><code>
server# /var/ossec/bin/manage_agents
...
   (I)mport key from the server (I).
...

server# /var/ossec/bin/ossec-control start
</code>

==== Проверка подключения агента ====
<code>
lan# /var/ossec/bin/agent_control -i 001
...
</code>
==== Контроль целостности файлов ====
<code>
server# cat /var/ossec/etc/ossec.conf
</code><code>
...
  <syscheck>
    <!-- Frequency that syscheck is executed (default every 2 hours) -->
    <frequency>300</frequency>
    <auto_ignore>no</auto_ignore> <!-- may not be needed -->
    <directories check_all="yes">/usr/local/sbin</directories>
...
</code><code>
server# /var/ossec/bin/ossec-control restart
</code>

==== Просмотр отчетов ====

  * [[https://www.ossec.net/docs/docs/programs/ossec-reportd.html|ossec-reportd]]
  * [[https://www.ossec.net/docs/manual/output/reports-email-output.html|Daily E-Mail Reports]]

<code>
lan# cat /var/ossec/logs/alerts/alerts.log

lan# cat /var/ossec/logs/alerts/alerts.log | /var/ossec/bin/ossec-reportd -f level 7

lan# cat /var/ossec/logs/alerts/alerts.log | /var/ossec/bin/ossec-reportd -f group authentication -r user srcip
</code>