[**NodeBB Forum Software**](https://nodebb.org) is powered by Node.js and supports either Redis, MongoDB, or a PostgreSQL database. It utilizes web sockets for instant interactions and real-time notifications. NodeBB has many modern features out of the box such as social network integration and streaming discussions, while still making sure to be compatible with older browsers.
* If you are a developer, feel free to check out the source and submit pull requests. We also have a wide array of [plugins](http://community.nodebb.org/category/7/nodebb-plugins) which would be a great starting point for learning the codebase.
* If you are a designer, [NodeBB needs themes](http://community.nodebb.org/category/10/nodebb-themes)! NodeBB's theming system allows extension of the base templates as well as styling via LESS or CSS. NodeBB's base theme utilizes [Bootstrap 3](http://getbootstrap.com/) but themes can choose to use a different framework altogether.
* If you know languages other than English you can help us translate NodeBB. We use [Transifex](https://www.transifex.com/projects/p/nodebb/) for internationalization.
* Please don't forget to **like**, **follow**, and **star our repo**! Join our growing [community](http://community.nodebb.org) to keep up to date with the latest NodeBB development.
## Requirements
NodeBB requires the following software to be installed:
It is important to ensure that your NodeBB and database servers are secured. Bear these points in mind:
1. While some distributions set up Redis with a more restrictive configuration, Redis by default listens to all interfaces, which is especially dangerous when a server is open to the public. Some suggestions:
* Set `bind_address` to `127.0.0.1` so as to restrict access to the local machine only
* Use `requirepass` to secure Redis behind a password (preferably a long one)
* Familiarise yourself with [Redis Security](http://redis.io/topics/security)
2. Use `iptables` to secure your server from unintended open ports. In Ubuntu, `ufw` provides a friendlier interface to working with `iptables`.
* e.g. If your NodeBB is proxied, no ports should be open except 80 (and possibly 22, for SSH access)
