In English, Hardening means hardening. Associated with security, it defines the “hardening” of your infrastructure in order to reinforce its reliability. It is essential to optimize your installation to minimize its attack surface. Indeed, when configured by default, your system includes many optional features. Uncontrolled, these options are likely to represent gaps in your infrastructure. By carrying out a complete study of your whole installation, we will analyze, target the sensitive points to finally strengthen your configuration. Your infrastructure is strengthened and able to defend itself against multiple attempts of daily intrusions.