IT Infrastructure & Resilience

Architecting, securing, and optimizing high-availability networks, enterprise compute, directory services, and disaster recovery environments that keep modern business running without interruption.

Executive Briefing

Building the Resilient Foundation for Digital Transformation

No business software, core banking system, or enterprise ERP can outperform the infrastructure it runs on. Bandwidth bottlenecks, single points of failure, unpatched hypervisors, and fragile backups expose businesses to crippling downtime.

ACE ICT Consult engineers robust, high-performance IT infrastructure for financial institutions, manufacturing leaders, and public sector organizations across Nigeria. We design infrastructure that scales effortlessly, withstands hardware failures, eliminates latency, and ensures rapid recovery from physical or cyber disasters.

High Availability (HA)Zero-Trust NetworkingActive Directory Tiering3-2-1-1-0 BackupHybrid Cloud

Core Capabilities

Enterprise Infrastructure Practices

From high-speed campus routing to hardened directory fabrics and multi-site storage replication, we ensure comprehensive operational reliability.

Pillar 01

Enterprise Network Architecture & SD-WAN

Designing fast, redundant, and segmented network backbones that eliminate downtime:

Multi-WAN & SD-WAN Redundancy: Aggregating diverse fiber, microwave, and satellite links with automated, sub-second failover and intelligent traffic steering.
Zero-Trust Network Segmentation: Implementing micro-segmentation, VLANs, and 802.1X port-level network access control (NAC) to contain malware spread.
Next-Generation Firewalls (NGFW): Deploying high-throughput firewalls with deep packet inspection (DPI), SSL decryption, IPS, and application-aware filtering.
Enterprise Wi-Fi & Core Switching: Designing high-density Wi-Fi 6/6E fabrics and 10GbE/40GbE core switching fabrics with spanning-tree and link aggregation resilience.

Pillar 02

Server Virtualization, Compute & SAN Storage

Consolidating physical hardware into resilient, scalable private cloud platforms:

Hypervisor Clustering: Enterprise VMware vSphere and Microsoft Hyper-V high-availability clusters with automated VM failover and live migration (vMotion).
Enterprise SAN & NAS Fabrics: Multi-tiered storage architectures using all-flash NVMe, iSCSI, and Fibre Channel with deduplication and snapshot automation.
Compute Capacity Planning: Modeling memory, IOPS, and CPU growth trajectories to prevent resource contention during peak processing periods.
Hardware Lifecycle Management: Server blade consolidation, power and thermal management, and out-of-band management (iLO/iDRAC) hardening.

Pillar 03

Active Directory & Hybrid Identity Fabric

Securing the central nervous system of corporate identity, access, and administration:

Three-Tier Administrative Security Model: Restricting Domain Admin accounts to Tier 0 assets, completely preventing lateral movement from compromised endpoints.
Group Policy (GPO) Baseline Hardening: Enforcing CIS Benchmarks, disabling obsolete protocols (SMBv1, LLMNR, NTLMv1), and enforcing AppLocker/WDAC application allowlisting.
Microsoft Entra ID (Azure AD) Hybrid Sync: Seamless single sign-on (SSO), passwordless authentication, and conditional access policies for remote and office staff.
Privileged Access Workstations (PAWs): Dedicated, isolated workstations for administrators managing sensitive infrastructure components.

Pillar 04

Disaster Recovery & Ransomware-Proof Backups

Guaranteeing business survival against ransomware encryption, hardware collapse, and environmental disasters:

The 3-2-1-1-0 Backup Architecture: Enforcing 3 data copies, 2 media types, 1 offsite, 1 immutable/air-gapped copy, and 0 errors verified via automated restoration drills.
Continuous Data Protection (CDP): Replicating mission-critical databases and virtual machines with near-zero Recovery Point Objectives (RPO).
Automated DR Orchestration: Runbooks that automate spin-up sequence of secondary site servers, DNS redirection, and network routing in under 15 minutes.
Annual DR Drills & Evidence: Conducting simulated disaster failover drills to provide verifiable proof of operational resiliency for auditors and regulators.

Structured Methodology

Engineering for Zero Downtime

Discovery & Health Check

We audit existing cabling, switches, firmware revisions, storage utilization, and single points of failure.

Capacity & HA Architecture

We design high-availability blueprints with n+1 hardware redundancy, low latency, and secure segmentation.

Staged Implementation

We execute upgrades in coordinated maintenance windows with zero interruption to live business transactions.

Validation & Knowledge Transfer

We conduct load testing, failover verification, produce as-built network diagrams, and train internal IT staff.

Technical Insight

Why Enterprise Backups Fail During Actual Disasters: 4 Overlooked Traps

During an emergency, discovering that backups cannot be restored is every CIO's worst nightmare. In real-world disaster recovery audits, four critical gaps account for over 85% of restore failures:

1. Missing, Lost, or Inaccessible Encryption Keys

Modern backups are rightly encrypted with AES-256 keys. However, when the primary site is destroyed or ransomware-encrypted, the key management server or password vault holding the decryption passphrases is frequently also lost, rendering the offsite backup files permanently unreadable.

2. Standby Compute Mismatch at the Secondary Site

Organizations often replicate terabytes of data to a secondary DR site, but budget constraints lead them to equip the DR site with outdated, underpowered servers. When a failover occurs, the secondary cluster cannot handle the production CPU and RAM load, causing immediate system freezing.

3. Crash-Consistent vs. Application-Consistent Snapshots

Backing up a virtual machine without proper VSS (Volume Shadow Copy Service) integration results in a crash-consistent state. When transactional database engines like Microsoft SQL or Oracle are restored, uncommitted transactions cause database corruption that requires lengthy manual repair.

4. Outdated DNS and Network Routing Cutover Plans

Restoring a server is only half the battle. If internal DNS pointers, public MX records, VPN endpoints, and firewall gateway routes are not scripted for automated cutover, branch offices and users cannot reach the restored systems even if they are booted and running.

Frequently Asked Questions

What is the difference between High Availability (HA) and Disaster Recovery (DR)?

High Availability (HA) provides automatic, immediate hardware-level failover within the same data center (e.g., redundant power supplies, RAID arrays, or dual clustered hypervisors) to survive component failures. Disaster Recovery (DR) involves an entirely separate geographical site capable of resuming operations when the primary data center experiences a total catastrophe.

How do immutable backups protect against ransomware?

Immutable backups use Write Once, Read Many (WORM) storage technology and object locking. Once written, backup files cannot be deleted, overwritten, or encrypted by anyone—even an attacker who has compromised Domain Administrator credentials—until a predetermined retention timer has elapsed.

How does ACE ICT Consult approach legacy infrastructure modernization?

We follow a phased, risk-managed modernization approach: we first baseline performance and dependencies, introduce hyperconverged or virtualized compute layers, migrate data in parallel stages with comprehensive rollback safety nets, and decommission legacy hardware only after operational stability is verified.

Your technology should enable the business, not expose it.

Speak to ACE ICT Consult about Resilient IT Infrastructure.

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