The requirements are pretty much similar to a web server. Just need some extra configuration on the existing server and some privileges on the server.
- Any web server running PHP module. Eg: Apache or IIS.
- PHP 5 and above with socket enabled. Please refer to PHP Socket Manual.
- Privileges to execute command line in the server.
- At least 2 modern web browsers. (Firefox 3.0 and above, Internet Explorer 7 and above)
It was tested on Windows XP Professional SP3, Apache 2.2. (with PHP5.2), Firefox 3.5, Internet Explorer 8, Google Chrome 5.0.