Linux Server Infrastructure Audits & Hardening

Focused on SSH and NGINX configuration review, exposure reduction, and operational safety for Linux systems.

Contact for scope discussion:

contact@coderacket.com

Who This Is For

I work with individuals and small teams operating Linux servers who need to reduce exposure risk, harden default configurations, or validate existing SSH and NGINX setups.

Typical environments include VPS instances, cloud VMs, and small on-prem systems that are internet-facing.

Scope of Work

SSH Audit & Hardening

Review and hardening of OpenSSH configurations including authentication methods, cipher selection, access controls, and logging with attention to common attack patterns.

NGINX Hardening

Configuration review for TLS, headers, request handling, and information exposure, including documentation of trade-offs and compatibility considerations.

Baseline Server Hardening

User permissions, firewall rules, service exposure, and logging review for Linux servers.

Audit & Hardening Packages

These offerings focus on configuration review and risk reduction. They are not penetration tests or compliance certifications.

SSH Audit & Hardening

  • Review of current SSH configuration
  • Identification of high-risk defaults and misconfigurations
  • Hardened configuration aligned with current best practices
  • Rollback-safe deployment notes

NGINX Audit & Hardening

  • TLS and protocol configuration review
  • Header and information leakage analysis
  • Request handling and rate-limit considerations
  • Before / after configuration comparison

Baseline Linux Server Review

  • User and permission model review
  • Firewall and exposed service analysis
  • Logging and audit visibility checks
  • Operational risk summary

About

I work primarily with Linux servers and exposed services, focusing on configuration review, hardening, and operational safety. This site documents my approach, configurations, and case-study-driven work rather than marketing claims.

Contact
About Me

Demonstrated Work

Documented examples and in-progress case studies.

SSH Hardening — Case Study (In Progress)

Will document threat model, configuration changes, validation steps, and operational trade-offs for an exposed SSH service.

NGINX Hardening — Case Study (In Progress)

Will include TLS configuration, header hardening, request handling, and before/after comparisons.

Flask authentication demo

Authentication Service (Contextual Example)

Demonstrates application-layer secure defaults. Included for context only and not a primary service offering.

View Code

Contact

For scope discussion or questions regarding an existing Linux server or service configuration.