Disable password-based authentication ( PasswordAuthentication no ) in favor of SSH key-pair authentication .
Prevent direct root access by setting PermitRootLogin no in /etc/ssh/sshd_config .
Linux server hardening is the process of reducing a system's attack surface to protect against unauthorized access and data breaches. A default Linux installation is often a "blank canvas" rather than a fortress; hardening provides the necessary reinforcement. Linux Server Hardening
Follow the principle of least privilege to limit what users and services can do.
The most critical step is ensuring all software is current to close known vulnerabilities. A default Linux installation is often a "blank
Moving SSH from port 22 to a non-standard port can eliminate up to 99% of automated scans. 3. Identity and Access Management
Below is a structured write-up covering the essential stages of a Linux hardening project. 1. Update and Patch Management Moving SSH from port 22 to a non-standard
Securing the primary remote entry point is vital for stopping automated brute-force attacks.