F3 needs at least the following server configuration:
- PHP 5.4 or higher
- PCRE 8.02 or higher (usually shipped with PHP package, but needs to be additionally updated on CentOS or Red Hat systems)
- mod_rewrite and mod_headers enabled
- GD libary (for Image plugin)
- cURL, sockets or stream extension (for Web plugin)
Nginx and Lighttpd configurations are also possible.