Infrastructure security - Protecting your critical systems, servers and environments

Hardening is the process of reducing a system's attack surface by disabling unnecessary services, hardening configurations and applying patches. An unhardened system is an easy target for attackers, as it often contains known vulnerabilities or default configurations exploited by malware. Hardening is therefore an essential step in any infrastructure security strategy.

Security in hybrid environments requires a unified approach. Consistent policies must be applied between internal servers and cloud workloads: network segmentation, MFA, communications encryption, access monitoring and centralized identity management.One of the major risks of hybrid environments is the disparity of security practices between platforms. Integration with solutions such as Azure Security Center, AWS GuardDuty or a centralized SIEM helps maintain consistent visibility and protection.

Vulnerability management involves identifying and prioritizing security flaws in systems and applications, using CVE scanners for example. Without vulnerability management, it's hard to know where to focus patching efforts. Without patch management, identified vulnerabilities remain exploitable. These two processes must therefore work together to effectively reduce the risk of exploitation.

Administrator accounts are highly privileged, and compromising them could have catastrophic consequences (IS takeover, data exfiltration, sabotage). Controlling access via a bastion or PAM allows you to apply just-in-time, log sessions and limit rights to what is strictly necessary, providing the traceability needed for audits, reinforcing security against internal threats and reducing the risks associated with attacks targeting privileged accounts.

A SIEM centralizes logs from all systems and correlates them to detect suspicious behavior. A SOC (Security Operations Center) exploits this data to monitor and react in real time, and in the case of infrastructures, to quickly spot anomalies: suspicious elevation of privileges, modification of a critical server, exploitation of a vulnerability. The SOC/SIEM is thus an essential link in the transition from reactive to proactive and continuous security.

Yes. Regulations such as the RGPD, the NIS2 directive or ISO 27001 require companies to protect their critical systems and infrastructures. This involves both technical measures (patch management, segmentation, encryption) and organizational measures (security policies, access governance).Not properly securing your infrastructure exposes you not only to fines in the event of a data leak, but also to major operational risks: production stoppages, loss of customer confidence and reputational damage.