Lucy can be installed on-premise or in the internet on any cloud server.
Reasons for installing on an external server in the internet are:
Reasons for installing LUCY on premises are:
You can place LUCY in the intranet or within a secured zone (DMZ). If you want to allow external users (e.g. mobile users with smartphones) to access LUCY's websites (attack simulations or e-learning), an installation in the intranet is not recommended for security reasons. The web server would be directly accessible from the Internet. In case of a vulnerability in the system or application, an attacker would have direct access to the intranet via the LUCY server. In such a case you should install LUCY in a separate zone. In that case you could consider using one LUCY instance only as a reverse proxy in that zone, and install the main application within the intranet as a "master instance". This configuration is described here.
Please consult this chapter.