Amazon VPC (Amazon Virtual Private Cloud) is a service that allows you to launch AWS resources in a logically isolated virtual network. This allows you to control your virtual networking environment from anywhere.
The selection of IP address range
Create subnets
Configuration of route tables and network gateways
Amazon VPC allows you to use both IPv4 (or IPv6) for most resources in your virtual cloud. This is to ensure that applications and resources are accessible securely. This blog will cover the main areas and details of Amazon VPC. Let’s start with an overview.
What is Amazon VPC?
Amazon VPC allows you to easily customize your VPC’s network configuration. This allows you to create a public-facing network for your web servers with internet access. This allows you to place your backend systems, such as databases and application servers, in a private subnet without internet access. It also allows you to use multiple layers of security including network access control lists and security groups for controlling access to Amazon EC2 instances within each subnet.
This also means that the AWS resources are automatically provisioned into a ready to use default VPC. You can also add or remove subnets, attach network gateways, change the default route table, modify the network ACLs, and modify the network gateways.
Amazon Virtual Private Cloud (Amazon VPC), Benefits
Amazon VPC provides advanced security features that allow for inbound and outbound filtering at both the subnet and instance level. You can also store data in Amazon S3 with restricted access to make it only accessible from instances within your VPC. It also includes monitoring capabilities that allow you to perform functions such as out-of-band monitoring or inline traffic inspection to screen traffic and protect it.
Amazon VPC allows you to spend less time configuring, managing, and validating. Let’s focus on the actual building of the applications that will run in your VPCs. You can create a VPC easily using the AWS Management Console and Command Line Interface. After choosing from a variety of network configurations, VPC automatically creates subnets, routes tables, IP ranges, and security groups that match your needs.
Amazon VPC allows you to control your virtual network environment by letting you, Firstly, select your own IP address range
Second, create your own subnets
Finally, configure route tables for any gateways that are available
These concepts will help you to understand Amazon VPC if you are new.
Amazon VPC concepts
Amazon VPC is the network layer for Amazon EC2. The key concepts for VPCs include:
First, Virtual private cloud (VPC). This refers to a virtual network that is assigned to your AWS account.
Secondly, Subnet. This is a list of IP addresses that you can use in your VPC.
The third is the Route table. This refers to a set or rules called routes that determine where network traffic is directed.
Then, Internet gateway. The gateway attached to your VPC allows communication between resources within your VPC, and the internet.
Next, VPC endpoint. This allows you to connect your VPC to AWS services and VPC endpoints powered by PrivateLink.
Lastly, CIDR Block. Classless Inter-Domain Routing provides an internet protocol address allocation method and route aggregation mechanism.
What are the features of Amazon VPC
Amazon Virtual Private Cloud features include security monitoring and enhancements to your virtual private cloud (VPC).
1. Reachability Analyzer
Reachability Analyzer is a static configuration analysis tool that analyzes and debugs network reachability between two resources within your VPC. After identifying the destination and source resources in your VPC,
Reachability Analyzer first displays hop-by-hop details about the virtual path between them, when they are reachable.
It also identifies the blocker component when it is not reachable.
2. VPC Flow Logs
For operational visibility into your network dependencies and traffic patterns, you can monitor your VPC flow logs sent to Amazon S3/Amazon CloudWatch.
Detect anomalies and prevent data loss
Troubleshoot network connectivity issues and configuration problems
Secondly, flow logs contain enriched metadata that can be used to gain additional insight into who initiated your TCP connections as well as the actual source and destination packets for traffic flowing through intermediate layers like the NAT Gateway.
3. VPC Traffic Mirroring
Mirroring VPC traffic allows you to copy network traffic using an elastic network interface from Amazon EC2 instances. It then sends the traffic to monitoring and out-of-band security appliances for deep packet inspection.
VPC traffic mirroring is another way to detect security and network anomalies.
Operational insights
Implement compliance and security controls
Troubleshoot problems
This feature also allows you to see the network packets flowing through VPC.
4. Ingress Routing
This is used to route all incoming and outgoing traffic from an Internet Gateway (IGW), or Virtual Private Gateway(VGW), to a specific EC2 instance’s Elastic Network Interface.
Secondly, this feature allows you to configure your virtual private clouds for sending all traffic directly to an IGW or VGW instance before it reaches your business workloads.
5. Security Groups
Security groups act as a firewall to protect Amazon EC2 instances that are linked. This group manages and controls outbound and inbound traffic at the instance level. After you have launched an instance, you can link the instance with one or more.