Highly available infrastructure for a critical healthcare application

A HIPAA-compliant, multi-region platform on Microsoft Azure

A critical patient-facing application needed a cloud home that was HIPAA compliant, highly available and recoverable in another region. We designed and built it on Azure with security in every layer.

ClientA US-based healthcare company
IndustryHealthcare
RegionUnited States
99.9%application availability
2Azure regions, with Site Recovery
2availability zones in the primary region
The challenge

What stood in the way

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HIPAA compliance

A compliant environment for a highly critical application.

High availability and DR

99.9% availability with recovery across regions.

Layered security

Firewall, IDS/IPS, anti-malware and anti-virus.

Monitoring and logs

Log retention and continuous monitoring.

Redundant storage

Storage that survives zone and region failure.

Patch and capacity management

Kept current without downtime.

Assessment & approach

From diagnosis to design

What we found

  • Active Directory: domain and additional domain controllers
  • Web and SQL Always On database servers with HA
  • Anti-malware, IDS/IPS, log inspection, file-integrity monitoring
  • Premium storage, Application Gateway, Application Insights, Azure Backup, ASR

What we did

  • Trend Micro security layer configured
  • AD, application and database servers configured for HA
  • Encryption on storage and disks
  • Secure IPSec VPN; certificates on endpoints
  • Anti-virus, IDS/IPS, firewall, NSGs and audit logs
The solution

How it is built

Solution designArchitecture
Access
Web users
App Gateway + WAFSSL
Admin usersvia jump box
Region 1 · two availability zones
Application poolscustomer 1 · 2 · 3
SQL listener + ILB
SQL 1 · SQL 2Always On
Active Directory
Azure Filesmanaged storage
Region 2 · recovery
Azure Site Recoverycreates machines on disaster
VHD replicationto storage
OMS · App Insightsmonitoring
The result

What the client gained

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HIPAA-compliant solution

Encryption, audit logs, IDS/IPS and secure channels by design.

Highly available across regions

VPN-compliant, fault-tolerant and scalable at any time.

Disaster recovery

Machines recreated in region 2 from replicated storage.

Online monitoring

OMS and Application Insights across the estate.

Secure by topology

Layered design with WAF, NSGs and host-based protection.

Scalable anytime

Per-customer application pools on common infrastructure.

Technology

Microsoft AzureSQL Server Always OnApp Gateway WAFAzure Site RecoveryAzure BackupTrend MicroOMS
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