General Requirements

MODx should work on most existing servers, even a ton of the ones that might not exactly be called expensive.

While Revolution has some additional specific requirements, the software below should work for MODx. If you want to make sure just follow the guidelines in the info-box at the right.

Software Stack

Supported Operating Systems

Linux x86, x86-64
Mac OS X
Windows XP, Server

Supported Web Servers

Apache 1.3.x - 2.2.x (uses htaccess for Friendly URLs by default)
IIS 6.0 (Friendly URL options/howto)
lighttpd (Friendly URL instructions)
Zeus (Friendly URL instructions)
nginx (Friendly URL instructions)

PHP Compatibility

4.3.11 and above
Required extensions:
- mod_rewrite (for friendly URLs/.htaccess)
- GD lib (required for captcha and file browser)
- Freetype (required for captcha)
Safe_mode off
Register_globals off
Memory_limit 32MB or more

MySQL Database Requirements

4.1.20 or newer, with the following permissions:
- SELECT, INSERT, UPDATE, DELETE are required for normal operation
- CREATE, ALTER, INDEX, DROP are required for installation/upgrades and potentially for various add-ons (DROP may not actually be required for upgrades, but it potentially could be used)
- CREATE DATABASE will allow new installs to create the database for you with the proper charset/collation.
- CREATE TEMPORARY TABLES may be used by some 3rd party add-ons
excludes version 5.0.51
InnoDB storage engine
MyISAM storage engine

Supported Browsers (for System Management)

Microsoft Internet Explorer 7 and above
Mozilla Firefox 3.0 and above
Apple Safari 3.1.2 and above

For optimal results

If you're looking for the ultimate server that supports MODx today with optimal performance and that supports Revolution in the future, consider the following:

Virtual or Dedicated Server
Apache 2.0.x or above with mod_rewrite
PHP 5.2.9 or later (5.3 when stable) with the following extensions and configuration:
- GD lib
- Freetype
- SimpleXML
- PDO
- MySQL, PostreSQL and SQLite PDO drivers
- mcrypt + mhash
- SOAP
- 64MB (or higher) Memory Limit
MySQL 5.0.67 or later
Ability to override server configuration via .htaccess files
SSH access with sudo privileges
Permissions to edit your PHP, Apache and MySQL config files
Linux Kernel 2.6 or later
Firefox 3 or Safari 3.1.2 or later for the Manager