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DAAKYI

SECURE · Network and Infrastructure Security

A Network That Contains Threats Instead of Carrying Them.

We engineer firewalls, gateways, segmentation, IDS/IPS and secure remote access across your infrastructure.

  • Contained lateral movement
  • Controls integrated end to end
  • Every deployment tested
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How Network and Infrastructure Security Works
  1. 1Map Assets and Flows
  2. 2Define Zones and Policy
  3. 3Build and Configure
  4. 4Harden to Baseline
  5. 5Test and Hand Over

Executive Summary

  • 01Segmentation turns a single compromised device into a contained incident instead of a network-wide breach.
  • 02Firewall policy decays unless every rule has an owner, a purpose and a review date.
  • 03Remote and supplier access should reach specific applications for a limited time, never the whole internal network.

The Challenge

Exposed remote access and unsegmented networks remain among the most common routes to serious incidents.

Ageing firewall rule sets and inconsistent hardening leave gaps that attackers routinely exploit.

The DAAKYI Approach

DAAKYI designs the network security architecture, deploys and configures perimeter and internal controls, and hardens infrastructure to agreed baselines.

Changes are tested before go-live and documented for operations.

  1. 01

    Network security architecture

  2. 02

    Firewall and gateway deployment

  3. 03

    Segmentation and IDS/IPS

  4. 04

    Infrastructure hardening

In Depth

How the Discipline Works

Segmentation Limits the Blast Radius

Most serious intrusions do not end where they begin. An attacker lands on one workstation, a forgotten VPN account, or an exposed management interface, then moves sideways toward systems of value. Segmentation breaks that path. Traffic is grouped into zones by function and sensitivity, and every crossing between zones passes through an enforcement point with an explicit rule. Domain controllers, payment systems, operational technology and guest wireless each sit in their own zone. A compromise in one zone stays visible and bounded. The design question is which flows the business needs, and which exist only because nobody removed them.

Rule Sets Decay Without Review

A firewall rule set is a record of past decisions. Projects add rules for a launch, suppliers receive temporary access, and engineers open a port to troubleshoot. Few of these rules are ever removed. Over time the policy fills with shadowed, duplicate, overly broad and unowned entries. Any-to-any rules and unused objects widen exposure while making audits harder. Review means tying every rule to a business owner and purpose, checking hit counts against actual traffic, and tightening sources, destinations and services to what is used. Expiry dates on temporary rules prevent the same drift from returning. Change control keeps the cleaned policy clean.

Remote Access as a Controlled Path

Remote access extends the network to devices and people you do not fully control. Staff, contractors and suppliers each need different reach. A flat VPN that places every user on the internal network repeats the segmentation problem at the edge. Better designs authenticate with multifactor methods, check device posture, and grant access to specific applications rather than whole subnets. Supplier sessions should be time-bound, logged and attributable to a named person. Management interfaces for firewalls, switches and hypervisors should never face the internet. Reach them only through a dedicated administrative path. This aligns with the least-privilege thinking in NIST SP 800-207.

Cloud architect walking colleagues through an architecture diagram
A firewall rule nobody owns is a door nobody checks.

Capability Matrix

What the Service Includes

  • Firewalls and Security Gateways

    Next-generation perimeter controls.

    Stage
    SECURE
    Delivered Through
    Project Implementation

  • Segmentation and IDS/IPS

    Internal zoning and intrusion prevention.

    Stage
    SECURE
    Delivered Through
    Project Implementation

  • Secure Remote Access

    Controlled access for staff and suppliers.

    Stage
    SECURE
    Delivered Through
    Project Implementation

  • Infrastructure Hardening

    Baselines applied to servers and devices.

    Stage
    SECURE
    Delivered Through
    Project Implementation

How It Works

How Network and Infrastructure Security Works

How Network and Infrastructure Security Works
  1. 01Design
  2. 02Deploy
  3. 03Harden
  4. 04Test

Methodology

The Method, Step by Step

  1. 1

    Map Assets and Flows

    Inventory networks, devices, remote access paths and data flows before designing anything. Capture which systems talk to which, over what services, and why. Identify crown-jewel systems and internet-facing exposure. This baseline shows where segmentation matters most and prevents controls from breaking applications nobody documented.

  2. 2

    Define Zones and Policy

    Group assets into zones by sensitivity and function. Write a policy that states which zone may reach which, on what services, with what logging. Choose enforcement points and decide inspection depth per boundary. Record assumptions and exceptions with owners so the design can be reviewed and defended later.

  3. 3

    Build and Configure

    Deploy firewalls, gateways and sensors to the agreed design in a staging environment first where possible. Apply rules from the policy, not from habit. Configure logging to a central collector, synchronize time, and set administrative access through a separate path. Keep configuration under version control so every change is traceable.

  4. 4

    Harden to Baseline

    Apply a recognized benchmark, such as CIS Benchmarks, to servers, switches and security appliances. Disable unused services and default accounts, enforce strong administrative authentication, and patch known-exploited flaws first. Record every deviation as an approved exception. Hardening is measured against the baseline, not against opinion.

  5. 5

    Test and Hand Over

    Test that allowed flows work and prohibited flows fail. Run vulnerability scans and attempt boundary crossings between zones. Verify alerts reach the people who respond. Confirm failover behavior. Hand operations the rule rationale, diagrams and rollback steps so the design survives staff changes.

Operating Model

Delivered from the SECURE Pillar

Pillar position

SECURE

Engineering, Architecture & Implementation

  • Engagement model

    Project Implementation

    Design and deployment of security technologies.

    Best for · Modernization and transformation

Threat Scenarios

What It Looks Like in Practice

  • Lateral Movement After Phishing

    How It Shows Up

    A user workstation begins scanning and authenticating to servers it never normally contacts.

    Response

    Zone boundaries deny the traffic and IDS/IPS alerts on the pattern, so the compromise stays contained and investigable.

  • Exposed Remote Access

    How It Shows Up

    An internet-facing VPN portal or RDP service receives repeated credential-guessing attempts.

    Response

    Remove direct exposure, enforce multifactor authentication, and broker access through a hardened gateway.

  • Forgotten Broad Firewall Rule

    How It Shows Up

    An old any-to-any entry lets an unexpected source reach a database server.

    Response

    Rule review removes the entry and ties remaining rules to owners. Logs confirm nothing legitimate depended on it.

  • Supplier Tunnel Misuse

    How It Shows Up

    A permanent supplier tunnel carries traffic into systems unrelated to the contract.

    Response

    Restrict the tunnel to named applications, make access time-bound, and log every session.

Outcomes

What Your Institution Gains

  • Contained lateral movement
  • Controls integrated end to end
  • Every deployment tested

Deliverables and Roles

What You Receive, and Who Does What

DeliverablePurpose
Network Security Architecture DocumentStates the zones, trust boundaries and enforcement points the environment is built around.
Firewall Rule Review ReportLists redundant, overly broad and unowned rules with recommended changes.
Hardening Baseline and Exceptions RegisterRecords the standard applied and every approved deviation from it.
Segmentation Test ResultsShows which flows were verified as allowed and which as blocked.
Operations RunbookGives administrators diagrams, rollback steps and alert-handling procedures.
RoleResponsibility
CISO or Security Lead (Client)Approves the zone policy, risk acceptance and any standing exceptions.
Network Operations Manager (Client)Owns change windows, availability and day-to-day rule requests.
Application and System Owners (Client)Confirm which flows each system genuinely needs and retire those it does not.
Security Network Engineer (Provider)Designs, configures and tests controls against the agreed policy.

Maturity Model

Where Organizations Typically Stand

  1. Stage 1

    Flat and Reactive

    Few internal boundaries exist, rules are added ad hoc, and logs are rarely reviewed.

  2. Stage 2

    Perimeter‑Defined

    The edge is hardened and remote access is managed, but internal traffic is largely trusted.

  3. Stage 3

    Segmented and Monitored

    Zones are enforced internally, IDS/IPS is tuned, and rule sets have owners and scheduled reviews.

  4. Stage 4

    Adaptive

    Access decisions use identity and device posture, policy is tested continuously, and temporary exceptions expire on their own.

Frameworks and Regulation

The Standards That Shape This Work

  • CIS Critical Security Controls v8

    Includes controls for network infrastructure management, network monitoring and defense, and secure configuration. Together they give a practical baseline for hardening and segmentation work.

  • NIST CSF 2.0

    Govern, Identify, Protect, Detect, Respond, and Recover are the six functions that make up the framework. Network controls mainly support Protect and Detect, while Govern keeps ownership of policy clear.

  • PCI DSS v4.0.1

    Requires network security controls to separate trusted and untrusted networks and to protect the cardholder data environment. Its future-dated requirements became mandatory on 31 March 2025.

  • NIST SP 800-207

    Describes zero trust architecture, which replaces trust based on network location with per-request decisions. It informs how remote access and internal zones are designed.

Buyer Guidance

Choosing the Right Provider

What to look for

  • Look for design documents that explain why each rule exists, not just exported configurations.
  • Look for rule review methods that use traffic data rather than judgment alone.
  • Look for testing that proves blocked flows are actually blocked.
  • Look for a handover that lets your own team operate and change the controls safely.

Questions to ask a provider

  • How do you decide which flows to permit between zones?
  • How will you test segmentation after deployment?
  • How will you handle supplier and administrative access?
  • What will we receive so we can operate the controls without you?

Regulatory & Industry Context

The Obligations This Service Supports

Engineering aligns to CIS Controls, NIST CSF and PCI DSS network requirements.

Frameworks DAAKYI helps clients implement

  • CIS Controls
  • NIST CSF
  • PCI DSS
  • ISO/IEC 27001

Framework references describe client implementation support, not DAAKYI certifications.

Technical Detail

For Architects and Security Leads

Telemetry sources and partner technologies
    • Cisco
    • Fortinet
    • Check Point
    • Zscaler

    Technology partners DAAKYI works with in this area.

    Framework and regulatory alignment
    • CIS Controls
    • NIST CSF
    • PCI DSS
    • ISO/IEC 27001

    Engineering aligns to CIS Controls, NIST CSF and PCI DSS network requirements.

    Architecture reference

    How Network and Infrastructure Security Works: Design → Deploy → Harden → Test.

    DAAKYI designs the network security architecture, deploys and configures perimeter and internal controls, and hardens infrastructure to agreed baselines.

    Firewall Rule Analysis in Practice

    Rule analysis starts with an export of policy, objects and hit counters across a meaningful observation period. Look for shadowed rules that an earlier entry already matches, redundant rules that duplicate another, and rules with zero hits. Flag any rule using any in source, destination or service. Expand nested object groups, because broad membership hides in them. Compare permitted flows with flow logs to find rules broader than actual use, then tighten to observed sources and ports after owner confirmation. Treat zero-hit rules carefully: disaster-recovery paths and quarter-end jobs may be dormant, not dead. Disable with logging before deleting, and keep a rollback copy.

    IDS/IPS Placement and Tuning

    Place sensors where they see traffic that matters: at zone boundaries, in front of critical servers, and on internet ingress and egress. Inline prevention suits well-understood signatures on high-confidence threats; passive detection suits areas where a false positive would interrupt operations. Encrypted traffic limits visibility, so decide where inspection is lawful and worthwhile and rely on metadata and endpoint telemetry elsewhere. Tune by suppressing signatures irrelevant to your systems, not by silencing noisy sources wholesale. Map detections to MITRE ATT&CK tactics such as discovery and lateral movement so alerts carry context. Review rules after every major change.

    Glossary

    Key Terms

    Trust Boundary
    The point where traffic passes between zones of different sensitivity and must be inspected and permitted by policy.
    Lateral Movement
    An attacker's progression from one compromised system to others inside the network.
    Shadowed Rule
    A firewall rule that never takes effect because an earlier rule already matches the same traffic.
    Management Plane
    The administrative interfaces and protocols used to configure network and security devices.

    Proof Points

    What We Can Stand Behind

    • Every stage of DAAKYI's delivery methodology produces documented, auditable deliverables.

    Technology partners

    • Cisco
    • Fortinet
    • Check Point
    • Zscaler

    FAQ

    Questions Leaders Ask

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