Hardening Server & Application Configuration

Welcome to a critical lesson on securing your backend systems! System hardening refers to the process of securing a system by reducing its attack surface.

Think of it as locking all doors and windows, not just the front door. This involves configuring operating systems, web servers, application servers, and databases to minimize vulnerabilities.

• Reduce Attack Surface: Close unnecessary entry points.
• Enhance Security: Apply secure configurations.
• Prevent Breaches: Make it harder for attackers to exploit weaknesses.

One of the biggest security risks comes from using default settings. Many operating systems, servers, and databases come with pre-configured settings that are convenient but not secure.

These defaults often include:

• Default Passwords: Easily guessable or publicly known.
• Open Ports & Services: Unnecessary network access enabled.
• Unused Accounts: Accounts that are never used but still active.

Always change default credentials and review all pre-enabled features immediately after installation.