System Requirements

Web Server

FOSSBilling works with any of these:

Apache (with mod_rewrite enabled)
LiteSpeed Web Server
NGINX — see our recommended config
OpenLiteSpeed — note: may not be ideal if you're selling web hosting (FOSSBilling itself runs fine)

Our recommendation: Apache or Apache behind an NGINX reverse proxy (handling static files). Most control panels are set up this way by default.

If you're using something else, you'll need to configure URL rewriting manually. Use one of our existing configurations as a reference.

These must be installed:

Install these for better performance and features:

Extension	Why You Want It
`mbstring`	Proper handling of multibyte characters
`opcache`	Highly recommended — significantly improves performance
`imagick` or `gd`	Image processing for logos and PDFs
`bz2`	Extract `.tar.bz2` archives (module/theme installs)
`simplexml`	Required for the Plesk integration only

Edit your php.ini:

memory_limit: At least 64M. Increase if you run many modules or have high traffic.
max_execution_time: Default 30 seconds is usually fine. Increase to 45–60 on shared hosting if needed.
allow_url_fopen: Set to On if you need remote images in PDFs or emails.

FOSSBilling requires a MySQL-compatible database:

Before installing, verify: