Network Security Architecture
Designing defensible network structures, trust boundaries, segmentation strategy, secure connectivity, and control placement that can be operated over time.
Network & Cloud Security
Hamidreza Khazaie, Network Security and Cloud Consultant
Senior Network and Cloud Security Engineer
I help organizations design secure network foundations, review cloud exposure, implement firewall controls, and harden infrastructure against practical attack paths.
Based in Rome, Italy. Open to freelance & consulting.
Services
Security engineering focused on architecture, exposure, and maintainable controls.
Cloud Security Posture Review
Reviewing cloud exposure, identity boundaries, network access paths, account posture, and practical guardrails for business workloads.
Firewall Implementation
Translating policy requirements into enforceable perimeter and internal controls, with rule hygiene, access review, and disciplined change handling.
Infrastructure Hardening
Reducing attack surface across network and server foundations through configuration review, secure baselines, priority fixes, and practical remediation planning.
Approach
A practical path from exposure to remediation.
- 01
Map exposure
Build a clear view of reachable services, remote access, cloud entry points, and paths that could affect critical assets.
- 02
Define boundaries
Separate business zones, privileged paths, partner access, administrative flows, and infrastructure dependencies.
- 03
Implement controls
Turn requirements into enforceable firewall policy, access controls, secure connectivity, and change-ready documentation.
- 04
Harden & remediate
Prioritize configuration fixes, reduce unnecessary exposure, strengthen administrative access, and document operational ownership.
- 05
Validate & hand over
Confirm that the agreed controls are working, findings are traceable, and the team has a usable improvement plan.
Case studies
Sanitized examples of the problems I help solve.
Enterprise perimeter review
Problem: A mid-sized enterprise had grown through acquisition and lacked a unified view of external exposure.
Outcome: Identified and prioritized 40+ exposure findings, reduced administrative access paths by 60%, and delivered a remediation roadmap.
Cloud security posture review
Problem: An AWS workload had grown organically without consistent guardrails or identity boundaries.
Outcome: Mapped public entry points and identity paths, removed unnecessary public services, and established account-level guardrails.
Infrastructure hardening program
Problem: A finance client needed to demonstrate consistent hardening across hybrid network and server infrastructure.
Outcome: Delivered secure baselines, configuration review, and a prioritized fix plan that satisfied audit requirements.
Send a short scope and the risk you want to understand.
Useful starting points include a network diagram, cloud account scope, firewall policy objective, hardening target, or a short description of the business concern.