Reserved Subnet Name | Min. Size of Subnet | Max. Size of Subnet | Recommended Size of Subnet | Related Azure Services |
---|---|---|---|---|
GatewaySubnet | /27 | /27 | /27 | Azure Virtual Network Gateway / ExpressRoute / Site-to-Site VPN |
RouteServerSubnet | /27 | /24 | /27 | Azure Route Server |
AzureBastionSubnet | /26 | /24 | /26 | Azure Bastion |
AzureFirewallSubnet | /26 | /26 | /26 | Azure Firewall |
AzureFirewallManagementSubnet | /26 | /16 | /26 | Azure Firewall Manager |
Delegated Services Name | Min. Size of Subnet | Max. Size of Subnet | Recommended Size of Subnet | Related Azure Services |
---|---|---|---|---|
Microsoft.DBforPostgreSQL/flexibleServers | /28 | /27 | /27 | Azure Database for PostgreSQL - Flexible Server |
Microsoft.Web/serverFarms | /26 | /27 | /27 | Azure App Service |
Microsoft.Network/dnsResolvers | /28 | N/A | /28 | Azure Private DNS Resolver (inbound) |
Microsoft.Network/dnsResolvers | /28 | N/A | /28 | Azure Private DNS Resolver (outbound) |
Microsoft.AVS/privateClouds | /22 | /22 | /22 | Azure VMware Solution |
Azure PaaS | Min. Size of Subnet | Max. Size of Subnet | Recommended Size of Subnet | Dedicated Subnet |
---|---|---|---|---|
Azure Virtual WAN Hub | /24 | N/A | /24 | Yes |
Azure Application Gateway | /26 (Standard or WAF SKU) | N/A | /24 (Standard_v2 or WAF_v2 SKU) | Yes |
Azure AD Domain Services (AADDS) | ? | N/A | ? | No |
Azure SQL Managed Instance (SQL MI) | /27 | N/A | /26 | Yes |
App Services (Web Apps, Function, API Apps) | /28 | N/A | /26 | Yes |
Azure API Management | ? | N/A | ? | Yes |
Azure Container Instances (ACI) | ? | N/A | ? | Yes |
Azure Spring Cloud | /28 | N/A | Depends on Requirement | Yes |
Azure Red Hat OpenShift Master Subnet | /27 | /27 | /27 | Yes |
Azure Red Hat OpenShift Worker Subnet | /27 | /24 | /25 | Yes |