Openfire (formerly known as Wildfire and Jive Messenger) is an instant messaging (IM) and group chat server for the Extensible Messaging and Presence Protocol (XMPP)
The first step is to install the Openfire packages. For Debian they can be downloaded from the official site by copying the .deb package link url. Once you get the address, you can use wget to download it to your VPS.
wget -O openfire.deb http://your.copied.link/
At the time of writing, the command would completely look like this:
wget -O openfire.deb http://www.igniterealtime.org/downloads/download-landing.jsp?file=openfire/openfire_3.10.0_all.deb
To install correctly, you need to try the following command using dpkg
dpkg - install openfire.deb
Openfire will be installed and started as a service
Access to the web panel
Installation at this stage is incomplete. In order to do this, then you need to go through the configuration wizard on the web panel. To access the panel, go to http://your.ip:9090/ and follow the steps in the setup wizard. You may need to enable other firewall ports depending on your specific needs or plugins. Check the list of ports in the Admin Console under System Information.