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Migration to Hybrid Cloud with Centralized Identity & Access

🎯 The Challenge 


Our client, a financial services company, was operating a legacy infrastructure entirely on-premise.

They faced several issues:

  • Increasing costs and rigidity of physical infrastructure
  • Scattered authentication systems and manual user provisioning
  • Security concerns and lack of visibility into access control
  • Pressure to scale quickly for digital projects

The need: modernize infrastructure, streamline user access, and ensure strong security compliance.


Our Approach

We designed and implemented a hybrid cloud architecture, combining on-premise assets with secure AWS resources, while consolidating identity and access through centralized AD + SSO. 



Step-by-step:

  1. Assessment & Planning
    • Infrastructure audit
    • Identification of cloud-ready workloads
    • Risk analysis and compliance mapping
  2. Hybrid Cloud Setup (AWS + VPN)
    • AWS VPC creation and subnet design
    • Secure VPN tunnel between on-prem and AWS using IPsec
    • Route table configuration to ensure seamless communication
  3. Active Directory Federation & SSO
    • Centralized Active Directory extended into AWS
    • Setup of AD Connector and AWS Directory Service
    • Implementation of Single Sign-On (SSO) via SAML for internal apps and AWS Console
    • Group-based access policies managed directly from AD
  4. Migration & Validation
    • Staged migration of services to AWS (file servers, internal apps, BI tools...)
    • Real-time user access testing using SSO credentials
    • Monitoring, logging (CloudTrail + SIEM), and fallback mechanisms


Security & Compliance Highlights

  • Encrypted site-to-site VPN (AES-256)
  • Role-based access with MFA enforced at login
  • Central logging of authentication events
  • GDPR and ISO 27001 alignment


The Results

  • ⏱️ 40% faster deployment of new workloads
  • 🔐 Unified and secure access for 100% of internal users
  • 🧑‍💻 No more password duplication — seamless SSO across tools
  • 📉 Reduced infrastructure maintenance by over 50%


Technologies Used

  • AWS: VPC, EC2, Directory Service, CloudTrail, IAM
  • Microsoft: Active Directory, AD FS, Group Policy
  • SSO: SAML 2.0, integration with apps like Office 365, Jira, and internal portals
  • Security: VPN IPsec, MFA (Duo), centralized logs

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