Here are some best practices for Azure network services :
1. Use a hub-and-spoke topology to organize and manage network resources. This model is good for organizing resources, maintaining security and simplifying network management.
2. Implement a centralized firewall in the hub to minimize costs.
3. Use managed DNS services, as they are designed to be secure, easy to deploy and configure.
4. Use Azure Private DNS zones for your Azure resources to ensure name resolution is kept within the virtual network.
5. Set up DNS forwarding between your on-premises DNS servers and Azure DNS servers for name resolution across environments.
6. Reserve IP addresses in your address space for critical resources or services.
7. Minimize the use of public IP addresses and use Azure Private Link when possible to access services over a private connection.
8. Use IPAM solutions to manage and track IP address allocation across your hybrid environment.
9. Plan your address space and choose an appropriate private address space (from RFC 1918) for your VNets that is large enough to accommodate future growth.
10. Avoid overlapping with on-premises or other cloud networks.
11. Use Classless Inter-Domain Routing (CIDR) notation to define the VNet address space, which allows more efficient allocation and prevents wasting IP addresses.
12. Divide your VNets into smaller subnets based on security, application, or environment requirements. This allows for better network management and security.
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