Network Architecture Security Review
Security starts with the blueprint. Expert review of your network topology, segmentation design, perimeter controls, and east-west traffic monitoring — mapped to NIST, CIS, and ISO 27001 standards.
Topology · Perimeter · Internal Controls
End-to-end network architecture assessment covering segmentation design, perimeter security, and internal east-west traffic controls.
Network Architecture Review
A systematic review of your network topology — evaluating segmentation boundaries, trust zone design, data flow logic, and resilience against lateral movement between network segments.
- Network topology and trust zone mapping
- VLAN / VRF segmentation verification
- Data Flow Diagram (DFD) security review
- High availability and redundancy assessment
Edge & Perimeter Design Review
Validating the security of your network perimeter — DMZ architecture, VPN and remote access configurations, DDoS protection posture, and edge router hardening against external threats.
- DMZ architecture and design review
- VPN and remote access security assessment
- DDoS protection and edge router hardening
- Ingress and egress traffic filtering controls
Internal Controls & Monitoring
Reviewing the layered internal controls that protect critical assets if the perimeter is breached — NAC, IDS/IPS placement and tuning, east-west traffic monitoring, and encryption enforcement.
- NAC (Network Access Control) review
- IDS/IPS placement and coverage analysis
- East-west traffic monitoring gaps
- Network encryption (TLS/IPSec) enforcement review
Poor Segmentation Turns a Small Breach Into a Total Compromise
Network architecture is the foundation that all other security controls rest on. A well-segmented network limits the blast radius of any single compromise — containing attackers within a small zone while defenders respond. A flat, poorly segmented network gives attackers free movement from a phishing click to your crown jewels.
Our network architecture review identifies the segments that should be separated but aren't, the monitoring gaps that make lateral movement invisible, and the perimeter design weaknesses that attackers exploit first.
Flat Network Exposure
Identifying networks where a single compromised device can reach all other resources.
DMZ Design Gaps
Finding internet-facing services not correctly isolated from internal systems.
VPN Bypass Risks
Detecting split-tunnel configs and authentication gaps in remote access.
Monitoring Blind Spots
Mapping internal traffic paths with no IDS/IPS or logging coverage.
5-Phase Network Architecture Review
From network discovery and documentation review through segmentation analysis, perimeter review, and the findings report with annotated diagrams.
Network Discovery & Documentation Review
We review existing network diagrams, firewall rule summaries, routing tables, and asset inventories. Where documentation is incomplete, we perform active discovery to map the actual network topology before assessment begins.
Trust Zone & Segmentation Analysis
Systematic analysis of how your network is divided into trust zones — evaluating whether each segment boundary correctly controls traffic based on asset sensitivity and business function. We identify segments that should be separated but aren't.
Perimeter & Remote Access Review
In-depth review of your network edge — DMZ design, firewall and WAF policies, VPN configurations, and remote access controls. We verify that internet-facing services are correctly isolated from internal resources.
Internal Controls & Lateral Movement Assessment
Evaluating the internal network controls that limit attacker movement after initial access — NAC effectiveness, IDS/IPS placement, east-west traffic visibility, and whether monitoring covers internal as well as external threats.
Findings Report & Remediation Roadmap
A prioritized findings report with annotated network diagrams showing segmentation gaps and high-risk traffic paths. A phased remediation roadmap with Cisco, Palo Alto, and Juniper-specific recommendations where applicable.
End-to-End Network Security Coverage
From segmentation verification and DMZ review through VPN security, east-west visibility, resilience design, and compliance mapping.
Segmentation Verification
Validating that VLAN, VRF, and micro-segmentation controls correctly enforce trust zone boundaries — preventing unrestricted lateral movement between network segments of different sensitivity levels.
DMZ Design Review
Evaluating whether your DMZ correctly isolates internet-facing services from internal resources — examining firewall rules, dual-homed hosts, and traffic flows through the demilitarized zone.
VPN & Remote Access Security
Reviewing VPN concentrator configurations, split tunneling policies, authentication strength, and remote access gateway hardening — ensuring remote connections don't bypass your internal security controls.
East-West Traffic Visibility
Identifying whether your IDS/IPS and monitoring tools have coverage of internal east-west traffic — the traffic between workloads within your network that attackers use for lateral movement after initial access.
Resilience & HA Assessment
Reviewing network redundancy and high availability configurations — ensuring that your network architecture can withstand component failures without creating security bypasses or service outages.
Compliance Gap Analysis
Mapping your network architecture controls against PCI-DSS network segmentation requirements, NIST SP 800-53 network controls, and ISO 27001 communications security controls.
Network Reviews That Go Beyond the Scan
We review network architecture as a system — understanding design intent, business function, and operational constraints before identifying what needs to change and why.
Documentation-First Approach
We start by reviewing your existing diagrams, change logs, and design documents — supplementing with active discovery only where needed. This gives us design intent context that pure scanning misses.
Hybrid Cloud Coverage
We review on-premises networks, SD-WAN deployments, and hybrid cloud connectivity in one unified assessment — because modern network attack paths cross all three.
Annotated Diagrams
Our reports include annotated versions of your network diagrams highlighting segmentation gaps, high-risk traffic paths, and remediation priorities — not just text descriptions.
Framework-Aligned Output
Findings mapped to PCI-DSS, NIST SP 800-53, ISO 27001, and CIS Controls — so your security and compliance teams speak the same language about the same findings.
Network Technologies We Assess
Frequently Asked Questions
Everything you need to know about network architecture security reviews
Find the Gaps Before Attackers Do
A network architecture review gives you a clear picture of where your segmentation fails, where your perimeter has gaps, and where lateral movement goes undetected. Schedule a scoping call to discuss your environment.
Get in Touch
Ready to secure your future? Reach out to us for a consultation.