When it comes to server security, there are several critical best practices that should always be implemented.
One important approach is using a bastion host (jump server) to protect the main production server. Instead of exposing the primary server directly to the internet, access is routed through a secure intermediary server. This significantly reduces the attack surface.
Another essential measure is configuring a proper firewall. Only specific IP addresses, IP ranges, and required ports should be allowed based on operational needs. All unnecessary ports must remain closed to prevent unauthorized access.
Authentication should be secured using SSH key pairs instead of passwords. Password-based authentication—especially for the root user—should be completely disabled. This minimizes the risk of brute-force attacks and unauthorized logins.
Additionally, root login over SSH should be disabled, and administrative access should be granted through privileged users with sudo rights instead.
Implementing these practices together greatly strengthens your server’s security posture and reduces the risk of compromise.
