Updated March 13, 2023
Introduction to azure vnet
A virtual network in Azure is termed as VNet, and it is a representation of the individual network present in the cloud. It is logical segregation of the Azure cloud-based on the subscription. So when the VNet is created, the virtual machine present in the cloud and the services can communicate securely and directly to each other within the cloud environment. Azure VNet is a basic building block for the private network in Azure. It can enable different types of Azure resources like virtual machines to protect and communicate with the internet, other components, and other on-premise networks.
What is Azure Virtual Network (VNet)?
In simple, Azure Virtual Network can be termed as an environment that holds the space to execute multiple applications and virtual machines in the cloud. So, once it is created and deployed, the virtual machines and the services present in the Azure network communicate securely to each other. Some of the important features of Azure Virtual Network are,
- VNet helps to direct the traffic from various resources and provide a secure network with maximum network connectivity.
- It offers an isolated environment for the applications.
- A subnet within a Virtual network that can access the default public internet.
- It creates comfortable network topologies in a structured and defined manner.
Use an Azure Virtual Network
Azure Virtual Network allows the resources of Azure to communicate with every component present in the internet and on-premise networks. It helps to accomplish the virtual network, which includes the communication of Azure resources on the internet, allows communication between Azure resources, communication with on-premise resources, network traffic routing, network filtering, and Azure service integration. So every resource present in the VNet can interact outbound to the internet. The VNet can also interact inbound by assigning a common public load balancer or public IP address. The user can make use of a public load balancer or public IP to manage the outbound connections.
How Does it Work?
Create an Azure virtual network in the Azure marketplace, then in every virtual network, create individual subnets. Then assign every subnet with the suitable instances or the concerned virtual machines. After that, associate the instances to the correct network security group. Then design the properties to every network security group and choose policies accordingly. Finally, launch the instances on Azure.
Log in to the Azure home page, choose new in the console.
In the network services tab, choose a virtual network and then click create
Give the name for the network and choose next.
Finally, the virtual network is created. After that, create a virtual machine in the same virtual network. For example, create a Windows 2012 R2 machine. Once it is created, choose the resource group which is already present in the virtual network and choose OK. DS1_V2 standard type is made by selecting desired configuration and size. Then choose the subnet as FrontEndSubnet, and the public IP should not be changed.
Develop an availability set and fault domains and name them accordingly. Choose to create.
Key components of Azure VNet:
The important components in Azure Virtual Networking are Subnets, routing, and network security groups.
Subnets: It is used to partition the virtual network into one or multiple sub-networks, and it can also be segregated logically with each subnet present in the server. The subnet is divided into two parts public and private. The private subnet enables the instances to access the internet by using NAT gateway, which is present in the default public subnet. NAT is abbreviated as Network Address Translator. The public subnet allows the instances to access the internet directly.
Routing: Routing helps to transport the data by choosing the correct path to transmit from source to destination. For every subnet, the automation in routing traffic and creating an individual route table is done by a virtual network.
Network Security Groups: It is defined as the firewall that secures the virtual machine by constraining the traffic in the network. It limits the outbound and inbound network traffic based on the port, protocol, and destination IP address.
Virtual network peering
The peering of Virtual Networks allows the user to associate virtual networks. The peering connection of VNet is done between virtual networks that allow the user to route the traffic privately via IPv4 address. The virtual machines present in the peered virtual network can interact with every component and service in the same network. There are two types of Virtual network peering. One is regional, and the other is global. The connection of virtual networks in the same Azure region is called Regional VNet peering. The connection of virtual networks present across different Azure regions is called Global VNet peering. The Virtual network peering enables the individual virtual network to interact with other resources in a different virtual network. It doesn’t require gateways, public internet, or encryption to establish communication within the virtual networks. The traffic in the network present in the peered virtual network is done as private. Traffic flow in between the virtual network is managed on the backbone network of Microsoft. It offers a minimum latency, maximum bandwidth connection between the resources present in one virtual network with other resources in a different virtual network. The user can develop peering between two VNets, and the network can come under the same subscription; various deployment models can be present in the same or different subscriptions.
Azure VNet functionalities:
The major functions of Azure VNet are it offers secured services in the service endpoints.
The resources in the VNet can be integrated with applications in the same region. It can also peer to the virtual network to the application that can be integrated within the network. In addition, it provides Express route connections.
Azure VNet is time and cost-consuming by centralizing the services which can be shared by multiple resources present in different virtual networks. So there will not be any downtime to resources in the virtual network when setting the peering or once after creating the peering.
This is a guide to azure vnet. Here we discuss Some of the important features of Azure Virtual Network along with the key components. You may also have a look at the following articles to learn more –