You are browsing the documentation for iTop 2.7 which is not the current version.

Consider browsing to iTop 3.1 documentation

Requirements & Installation

Minimum Hardware requirement

Your needs Our recommendation
Ticket created per month Console Users CMDB: CIs Servers CPU Memory Disk for MySQL
< 200 < 20 < 50k An all in one server 2vCPU 4Gb 10Gb
< 5000 < 50 < 200k Two servers: Web + MySQL 4vCPU 8Gb 20Gb
> 5000 > 50 > 200k Two servers: Web + MySQL 8vCPU 16Gb 50Gb

The minimum screen size for using iTop is 1024*768 pixels, but the higher resolution the better.

We recommend to use virtual machines running Debian 9 or Ubuntu 20.04 LTS

Software requirements

iTop server

iTop is based on MySQL and PHP.

  • Plus of-course a web server: Apache and IIS have built in configuration, other web server require extra work (eg. with NGINX).
  • Graphviz is needed to display the impact analysis graph.
  • required PHP extensions : ctype, dom, iconv, json, mbstring, mysqli, soap
  • php-gd is optionnal but required to be able to add images with CKEditor and resize automatically images within HTML fields.
  • fileinfo is usually present, but if missing you must add it, for attachment type identification, so preview can be proposed when pertinent.
  • Check Encrypted data for what to install to managed EncryptedString attribute
  • To select a database version, check MariaDB release notes by version and MySQL release notes

iTop compatibility list

iTop Min required → Max supported Known Limitations
2.3.x 5.3.6 5.0
2.4.x 5.3.6 5.5.3
2.5.x 5.3.6 5.5.3 5.5
5.6 → 7.3
5.6 10.1 MySQL 8 not working, PHP 7.4 not working
PHP 7.3 supported from 2.6.1
2.7.7 - 2.7.8
5.6 → 5.7 10.1 → 10.4 MySQL 8 supported (not recommended for large databases !),
PHP 7.4 recommanded
IE9 no more supported
PHP 5.6 and 7.0.8 can work but not with all extensions
PHP 7.1.3 min is required if you use oAuth2 or extension Brute Force Protection
2.7.9+ 5.6 → 5.7 10.1 → 10.6 PHP 7.1.3 min is required
7.1.3 → 8.0
5.7+ 10.3 → 10.6 MariaDB is now preferred to MySQL
IE11 no more supported
PHP 8.0 supported only since 3.0.2
PHP 8.1+ not supported
3.1.x 7.48.1 5.7+ 10.3.710.6 PHP 8.1 supported
3.2.x 8.18.3 5.7+ 10.610.11 PHP 8.2 and PHP 8.3 supported


  • in bold: when the min or max version has changed since the previous iTop version
  • in italique: the highest version supported, when it is known
Galera clusters with multiple masters are NOT supported by iTop, because such clusters do not properly implement the GET_LOCK MySQL function (for more information: Galera cluster known limitations).

Recommended configuration

Optional requirements:

  • For LDAP authentication iTop requires the PHP LDAP module. If this PHP module is not present iTop will not support LDAP or Active Directory identification.

Web Browser

Latest version of Chrome is recommended (Firefox is safe to).

  • Since 2.7.0, IE9 is no more supported
  • Following versions of iTop will no longer supports any Internet Explorer versions

Architecture constraints

Allow to pass OQL queries as parameters

In iTop, lots of pages are sending OQL queries as parameters. This is risk-free as queries are interpreted and customized by iTop before being transformed in a single Select only SQL query and sent to the DB server, so iTop :

  • check syntax and classes validity
  • adds appropriate filters according to user rights
  • protects against injections

As OQL syntax is close to SQL, this may be blocked by a security system like mod_security. You must allow those in order to use iTop. For example with mod_security :

SecRule REQUEST_URI "@beginsWith /pages/UI.php" \
"id:'000013', \
phase:1, \
t:none, \
nolog, \
pass, \
ctl:ruleRemoveById=942190, \


We strongly recommend to enable APCu. For more details, read Tuning iTop Performance

However, if you are using APCu on mutiple instances, after a Move To Production, the cache must be cleared on all instances. As we have no tools for doing this, practically speaking this means:

  • either restart all web servers
  • or do not use APCu

Downloading iTop

You can download iTop from SourceForge:

If you are a Combodo customer, ask Combodo for Essential or Professional package.

Installing the Prerequisites on Debian or Ubuntu

To install the required software on Ubuntu, run the following commands (as root):

PHP 7.2+ MariaDB
apt-get install apache2
  apt-get install mariadb-server
  apt-get install php7.2 php7.2-mysql php7.2-ldap php7.2-cli php7.2-soap php7.2-json graphviz
  apt-get install php7.2-xml php7.2-gd php7.2-zip libapache2-mod-php php7.2-mbstring
PHP 7.1 and MySQL
  apt-get install apache2
  apt-get install mysql-server
  apt-get install php php-mysql php-ldap php-cli php-soap php-json graphviz
  apt-get install php-xml php-gd php-zip libapache2-mod-php php-mbstring
Starting with MySQL 5.7, the root user has no explicit password in MySQL, so you will have to create a user account with a password for installing iTop. The commands below create a user iTop with all privileges. This is useful for testing but is not the best configuration for use in production (because security matters):
  sudo mysql

Once logged in MySQL, execute the following commands:

  GRANT ALL PRIVILEGES ON *.* TO 'iTop'@'%' IDENTIFIED BY 'some_password';

Installing the Prerequisites on Redhat, CentOS or Fedora

To install the required software on Redhat / CentOS / Fedora, run the following commands (as root):

yum install httpd
yum install mysql mysql-server
yum install php php-mysql php-xml php-cli php-soap php-ldap php-gd php-zip php-json php-mbstring graphviz
Those packages may have other name on future versions of OS.
For example on Centos 8, php-mysql was replaced by php-mysqlnd.

Installing the Prerequisites on Windows

Installing PHP on IIS

Check this page : iTop and IIS

Installing MySQL

If you do not already have a MySQL database server, you can install it on the same system as the rest of the application.

  1. Go to MySQL's download site:
  2. Download the installer suitable for your system: select package named “MSI Installer” either the 32 or 64-bit version.
  3. Launch the installation, by opening the downloaded .msi file.
  4. Follow the instructions of the installation wizard

Other dependency: graphviz

iTop relies on Graphviz to produce graphical representations of the object's life-cycle as well as the impact analysis graph.

On Linux, graphviz is already part of the prerequisites defined above, so there is nothing additionnal to do.

On Windows: download Graphviz from the web site and install it.

You will be prompted to supply the exact path to Graphviz during the setup. The expected value is the the full path to the dot executable (named dot.exe on Windows). For example /user/bin/dot on Linux and C:\Program files (x86)\Graphviz 2.68\bin\dot.exe on Windows.
2_7_0/install/installing_itop.txt · Last modified: 2023/03/28 12:17 (external edit)
Back to top
Contact us