Openfire is a real time collaboration (RTC) server licensed under the Open Source Apache License. It is also known as Jabber. It uses the only widely adopted open protocol for instant messaging, XMPP. The full name of XMPP is Extensible Messaging and Presence Protocol. It is a real-time communication protocol (which includes chat) based on XML. Installation and the management of Openfire is pretty simple.
It should be noted that with Openfire, no chat is possible yet. A client is needed: Openfire cannot be used alone, just like web servers need a browser.
In this tutorial we will see, how to install Openfire in a clean minimal installation of CentOS 7.
Full article here:
How To Install Openfire On CentOS 7 (Unixmen)