Course 29 - AZ-500 Microsoft Azure Security Technologies | Episode 4: Protecting Azure Virtual Networks

In this lesson, you’ll learn about implementing and securing Azure Virtual Networks (VNETs) for robust cloud network protection:Virtual Network FoundationsUnderstanding VNET architecture in Microsoft Azure:Defining private IP ranges using CIDR notationConfiguring custom DNS settingsSegmenting networks into subnets for isolationService Endpoints:Creating secure, direct connections to Azure services (e.g., Storage, SQL)Keeping traffic within the Microsoft backbone instead of the public internetVirtual Network PeeringConnecting multiple VNETs across regions securelyEnabling:VNET-to-VNET communication over Microsoft’s backboneGateway transit for shared VPN/ExpressRoute accessSupporting scalable architectures like hub-and-spoke modelsNetwork Security Groups (NSGs)Using NSGs as stateful firewalls to control traffic flowApplying rules based on the five-tuple model:Source IPSource portDestination IPDestination portProtocolLeveraging service tags to simplify rule management for Azure servicesApplication Security Groups (ASGs)Grouping virtual machines by role (e.g., Web, App, Database tiers)Applying security policies based on logical groupings instead of IPsSimplifying rule management in complex environmentsHands-On Security ImplementationBuilding a secure lab environment:Deploying a Windows bastion host for controlled accessCreating a Linux application serverApplying strict access controls:Restricting RDP access to a trusted public IP onlyAllowing SSH communication between authorized internal systemsBlocking all traffic by defaultKey TakeawaysVNETs provide network isolation and segmentation in the cloudSecurity is enforced through layered controls (NSGs + ASGs + endpoints)Proper design (e.g., bastion hosts, least access rules) significantly reduces attack surfaceThis lesson builds a strong foundation for securing Azure infrastructure by combining network design, access control, and practical implementation strategies.You can listen and download our episodes for free on more than 10 different platforms:https://linktr.ee/cybercode_academy