Hey people, in the last three tutorials, we've learned what the cloud is, about ec2 instances, and other basic things about the cloud. Now, we are going to learn about the VPC (Virtual Private Cloud).
Introduction
VPC (Virtual Private Network) is the fundamental building block in AWS, it allows you to create a private network in the AWS Cloud. It enables you to logically isolate and control your cloud resources while connecting them securely to the internet, on-premises data centers, or other AWS services.
Key Components in Amazon VPC:
Subnet:
Subnets are segments of your VPC's IP address range. You can create public and private subnets to control the accessibility of your resources. Public subnets are typically used for resources that need direct Internet access (e.g., web servers), while private subnets are for resources that should not be directly accessible from the Internet (e.g., databases)
IP Address Range (CIDR Block):
When you create a VPC, you specify an IP address range in the form of a Classless Inter-Domain Routing (CIDR) block. This range determines the set of IP addresses that can be used within your VPC.
Security Groups:
Security groups act as virtual firewalls for your Amazon EC2 instances and other AWS resources. You can specify inbound and outbound traffic rules to control access to your resources based on IP addresses, ports, and protocols.
Network Access Control Lists (NACLs):
NACLs are stateless network traffic filters that control traffic at the subnet level. They allow you to define rules for both inbound and outbound traffic, and they are evaluated before security groups.
Internet Gateway (IGW):
An internet gateway allows resources within your VPC to access the internet and be accessed from the internet. It's typically associated with public subnets.
NAT Gateway/NAT Instance:
Network Address Translation (NAT) gateways or NAT instances allow resources in private subnets to initiate outbound traffic to the internet while remaining private. This is commonly used for updates, patching, and retrieving software packages.
VPC Peering:
VPC peering allows you to connect two VPCs, enabling resources in one VPC to communicate with resources in the other as if they were on the same network.
VPC Endpoints:
VPC endpoints provide private connectivity to AWS services like S3 and DynamoDB from within your VPC without traversing the internet.
VPN and Direct Connect:
You can establish secure connections between your on-premises data center and your VPC using Virtual Private Network (VPN) connections or AWS Direct Connect.
Flow Logs:
Flow logs capture information about IP traffic going to and from network interfaces in your VPC. They help you monitor and troubleshoot network connectivity and traffic.
Connect VPC
To create a VPC in AWS:
Sign in to the AWS Management Console.
Navigate to the VPC dashboard.
Click "Create VPC" and follow the wizard to define your VPC's CIDR block, subnets, and other configurations.
In our next tutorial, we are going to learn about the Security Groups, NACL, Route 53, AWS CLI, and many other.
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