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Server security encompasses practices and controls to protect server systems, their operating systems, services, and hosted applications from compromise. It combines hardening, patch management, access control, logging and network protections to reduce attack surface and ensure integrity, confidentiality and availability of server workloads.
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Server security comprises technical and organizational measures that protect servers, services, data, and access from abuse, outage, and unauthorized change.
The discipline grew from classic system hardening and network security into continuous protection of operating systems, services, and configuration. Automated hardening rules such as the DevSec Hardening Frameworks collect controls for repeatable checks.
Reduce attack surface by enabling only needed services and privileges. Protect connections and secrets, keep software patched, log relevant events, and test recovery; hardening complements rather than replaces threat analysis.
Open ports, services, packages, and interfaces are potential entry points that should be limited.
Secure defaults and checked rules reduce unnecessary exposure.
Logs, alerts, backups, and tested procedures limit impact when protections fail.
Server security protects confidentiality, integrity, and availability. It requires ongoing maintenance, ownership, secure administration, vulnerability management, and incident exercises.
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