Server-Side Security Hardening for Spring Boot Applications on Ubuntu Linux

Abstract

As enterprise and web applications increasingly rely on Spring Boot due to its modular architecture and developer productivity advantages, securing these applications at the server level becomes critical. This paper explores robust server-side hardening tech-niques tailored for Spring Boot deployments on Ubuntu Linux servers. Emphasizing a layered defense approach, the study examines the integration of OS-level hardening, network-layer filtering, and application-level configurations to reduce the attack surface. The paper also revisits past literature on Linux security and Java-based web frameworks to position contemporary challenges. Visual aids including diagrams, tables, and graphs contextualize the severity of risks and mitigation strategies. The work aims to provide a practical and adaptable security blueprint for system administrators and DevOps engi-neers.