Network Security

Eliminate lateral movement. Enforce least privilege at the network layer.

Networks grow. Rules accumulate. Segmentation gets deferred. The result is a flat network where a compromised endpoint can reach everything — databases, management interfaces, cloud APIs, and other segments that should be isolated. Firewalls with thousands of rules that nobody fully understands. Remote access through legacy VPNs that grant broad network access instead of application-specific access.

Deep Layer assesses your network security posture, identifies the segmentation gaps and firewall rule entropy that create the most risk, and designs Zero Trust architectures that enforce explicit verification and least privilege at every access point. Implementation-ready designs — not theoretical frameworks.

NIST CSF 2.0CIS Controls v8NIST 800-53

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Challenges We Address

The problems that bring clients to us.

Flat Networks

A compromised endpoint can reach databases, management interfaces, and other segments. Segmentation was planned but never implemented.

Firewall Rule Entropy

Rules accumulate over years without removal. 20-50% of rules are typically unused. Overly broad permits. Undocumented exceptions. Shadowed rules.

Remote Access Sprawl

Legacy VPNs grant full network access. Jump servers, direct RDP/SSH, and split tunneling configurations create multiple uncontrolled entry points.

East-West Blind Spots

North-south traffic is inspected. East-west traffic between internal segments flows uninspected. Lateral movement goes undetected.

Ideal Clients

Who this is built for.

Organizations with flat network architectures that have grown without segmentation strategy

Companies with firewall rulebases exceeding 1,000 rules with no rationalization process

Teams planning Zero Trust migration and needing an architecture before vendor selection

Organizations with OT/IT convergence requiring network isolation between environments

Companies relying on VPN-only remote access needing a ZTNA migration path

Service Offerings

What we deliver.

Network Security Assessment

Assessment

Evaluate segmentation effectiveness, firewall rule hygiene, remote access architecture, network access controls, DNS/web security, and east-west traffic visibility.

Segmentation gap analysis

Firewall rule hygiene review

Remote access architecture assessment

Network access control evaluation

DNS and web security review

Risk-rated findings with remediation roadmap

Zero Trust Architecture Design

Design & Architecture

Complete, implementation-ready Zero Trust architecture grounded in NIST SP 800-207 — trust zones, microsegmentation, ZTNA/SASE, identity-aware access policies, and phased migration plan.

Zero Trust readiness scoring across 5 pillars

Target-state architecture with trust zones

ZTNA/SASE architecture design

Identity-aware access policy framework

Application dependency mapping (10-15 critical apps)

Phased migration plan with rollback strategy

Validation test plan

Firewall Rationalization & Hardening

Assessment

Rulebase analysis to identify unused rules, overly broad permits, and undocumented exceptions — plus platform hardening against CIS Benchmarks.

Rule utilization analysis (identify unused/shadowed rules)

Overly broad permit identification

Rule documentation and business justification review

Platform hardening against CIS Benchmarks

Change-management-ready remediation package

Firewall & WAF Optimization

Implementation

Activate underutilized NGFW capabilities (App-ID, SSL inspection, IPS, URL filtering) and calibrate WAF policies for sustainable blocking mode using traffic-informed tuning.

NGFW feature activation (App-ID, IPS, SSL/TLS inspection)

Traffic-informed WAF policy calibration

False positive analysis and rule tuning

Monitor-to-enforce transition planning

Ongoing tuning methodology documentation

Frequently Asked Questions

Common questions.

Do you implement the Zero Trust architecture or just design it?

The engagement produces an implementation-ready architecture with detailed specifications, migration sequencing, and validation test plans. The architecture is designed to be implementable by your team or a selected vendor.

Which firewall platforms do you work with?

Palo Alto, Fortinet, Check Point, Cisco ASA/FTD, Juniper SRX, and cloud-native controls (AWS Security Groups/NACLs, Azure NSGs, GCP VPC rules). Platform-specific experience means findings are actionable, not generic.

Related Practice Areas

Ready to discuss network security?

30-minute discovery call. We will discuss your environment, your challenges, and whether there is a fit — no sales pitch.

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