Network Topology and Connectivity -Azure Cheat Sheet by haraldthegrey

 Segmen­tation: Use VNets for workload separa­tion. Subnets for different applic­ations (web, database, API).
 Security: Apply NSGs for traffic filtering.
 Regional Archit­ecture: Implement Availa­bility Zones for high availa­bility.
Scalab­ility: Design for automated scaling and modular struct­ures.

 Azure Firewall: Centra­lized access manage­ment. Integrates with Azure Sentinel.
 Network Security Groups: Control traffic via IP, port, and protocol for subnets and VMs.
 Azure Private Link: Secure access via private endpoints, isolated from the public internet.
 Compliance Standards: ISO27001 and NIS² for documented security policies.

VPN Gateway: Cost-e­ffe­ctive secured connec­tions with limited bandwidth.
Expres­sRoute: Dedicated connection with high bandwidth and no internet depend­ency.
Scalab­ility: Dynamic scaling with Azure Virtual WAN and modular extens­ions.

 Archit­ecture Compon­ents: On-Pre­mises Datacenter linked via VPN Gateway or Expres­sRoute.
 Firewalls: Local security segmen­tation and Azure integr­ation.
 Security Mechan­isms: Use Private Link for secure traffic; monitor via Azure Monitor.

 Regions: Select nearest Azure region to minimize latency; use multiple for redund­ancy.
 Availa­bility Zones: Protect against datace­nte­r-level failures.
 Docume­nta­tion: Keep security and network topology updated.

 Monito­ring: Utilize Azure Monitor and Log Analytics for insights.
 Updates: Regularly revise policies per ISO27001 and NIS² standards.

 Connec­tivity: On-Pre­mises VPN Gateway ↔ Azure VPN Gateway.
 Redund­ancy: Primary and Secondary Regions config­ured.
 Security: Azure Firewall and NSGs filter traffic.

 Perfor­mance: Check bandwidth and latency for both VPN and Expres­sRoute.
 Usage: Analyze traffic patterns with Azure Monitor.