This blog post will go through some quick tips including Q/A and related blog posts on the topics that we covered in the Azure Administration Day 2 Live Session which will help you gain a better understanding and make it easier for you to
Azure Virtual Networking
Azure Virtual Networking (VNet) is the fundamental building block for your private network in Azure. VNet enables many types of Azure resources, such as Azure Virtual Machines (VM), to securely communicate with each other, the internet, and on-premises networks. Virtual Machine is no different than any other physical computer like a laptop, smartphone, or server.
Check more on Azure Virtual Network (VNet).
IP Address
An Internet Protocol Address is a numerical label assigned to each device connected to a computer network that uses the Internet Protocol for communication. An IP Address serves two main functions: host or network interface identification and local addressing.
Public IP and Private IP
Public IP addresses allow internet resources to communicate inbound to Azure resources. Public IP addresses enable Azure resources to communicate to internal and public-facing Azure services. The address is dedicated to the resource until it’s unassigned by you. Azure dynamically assigns an available IP address that isn’t dedicated to the resource.
Private IP addresses are used for communication within a Virtual Network, your on-premises network, and the Internet. You must assign at least one private IP address to a virtual machine. Helps a private network to connect securely to other devices within that same network.
Subnets
A subnet is a range of IP addresses in the virtual network. You can divide a virtual network into multiple subnets for organization and security. Each Network interface card connected in a virtual machine is connected to one subnet only.
Q1. Can we change VM from subnet 2 to subnet 1?
Ans. We first need to understand how a Virtual Machine is integrated with a subnet. To be more specific Virtual Machines are not directly connected with a Subnet. Virtual Machines are connected with Network Interface Card and in turn, those NICs are connected to the Subnets. So, technically, it is not possible to change the Subnet of a Virtual Machine as they are really not connected with the Subnet.
So, in order to change the Subnet associated with a Network Interface Card, navigate to the NIC to which the Virtual Machine is connected by clicking on the NIC associated with the Virtual Machine.
Q2. Why would there be a need to reserve public IP?
Ans. There are a few reasons why you need a Reserved IP address
- Easy A-Record DNS: Because you maintain the same public IP after delete and shutdown VMs, you can avoid having to reprogram DNS or other applications depending upon the IP to the newly assigned IP when you restart.
- On-Premise Connectivity Security: You can now provide access to your Azure Services from your enterprise network, leveraging the public IP but controlling and access through your proxy/firewall on-premises. You now don’t need to worry about re-programming that each time you start and stop your VM. Check more on Public IP Address.
Azure Virtual Machine
Also, Check Our blog post on Azure Front Door. Click here
Secure Shell (SSH)
Check Out: Our blog post on Microsoft Azure Administrator Learning Path. Click here
Network Security Groups (NSGs)
Application Security Groups(ASGs)
Azure Firewalls
Route Tables
Domain Name Server(DNS)
Jump Box or Jump Host or Jump Server
A jump server, jump host, or jump box is a system on a network used to access and manage devices in a separate security zone. Used to securely access instances in the private subnets.
Azure Bastion Host
Quiz Time (Sample Exam Questions)!
Related/References
- [AZ-104] Microsoft Azure Administrator Exam: Everything You Need To Know
- [AZ-104] Microsoft Azure Administrator Training: Step By Step Activity Guides/Hands-On Lab Exercise
- [Recap] Day 1: Azure Administration & Governance and Compliance [Azure Administrator] [AZ-104]
- Virtual Networks In Microsoft Azure
- Microsoft Docs: Network Security Groups(NSGs)
- Microsoft Docs: Route Tables
- Microsoft Docs: Azure Security Groups(ASGs)
- Microsoft Docs: Azure Private DNS
- Microsoft Docs: Azure Firewall
- Azure Bastion Host Overview and Steps to Create
- [AZ-104] Create And Connect An Ubuntu Virtual Machine In Azure
Next Task For You
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