Introduction to AWS Networking
AWS with Chetan・23 minutes read
Understanding AWS networking is crucial for scalability and security at different OSI model layers, with developers needing to grasp VPC basics such as address space, subnets, and security groups. DevOps professionals should also be familiar with transit gateway and network automation, while network administrators must understand Direct Connect and network security against DDoS attacks to optimize performance and connectivity within AWS infrastructure.
Insights
- Understanding AWS networking is essential for scalability and security, spanning various OSI model layers and involving concepts like VPC, subnets, gateways, firewalls, and load balancers.
- Different roles, such as developers, DevOps professionals, and network administrators, need to grasp specific AWS networking components like transit gateway, Direct Connect, VPNs, and network automation to ensure efficient operations, performance, and security within cloud environments.
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Recent questions
What is a VPC in AWS?
A Virtual Private Cloud (VPC) in AWS is a private network where EC2 instances reside, each with a CIDR range and a default local router for internal communication.
How do public and private subnets differ in AWS?
Public subnets in AWS have Internet access through an Internet gateway, while private subnets do not have direct Internet access.
What is the purpose of NAT devices in AWS?
NAT devices in public subnets facilitate outbound Internet access for EC2 instances in private subnets, allowing them to communicate with the Internet indirectly.
How does AWS Direct Connect benefit network connectivity?
AWS Direct Connect offers consistent bandwidth and private connectivity to AWS, providing high-speed, low-latency links for improved network performance.
What is the function of VPC peering in AWS?
VPC peering in AWS allows communication between multiple VPCs privately without internet access, simplifying network architecture and enhancing security.
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Summary
00:00
Essential AWS Networking for Scalability and Security
- Understanding AWS networking is crucial for architecture scalability and security at different OSI model layers.
- Developers should be familiar with VPC basics, including address space, CIDR, Internet gateway, subnets, route tables, IP addresses, firewalls, security groups, network ACLs, load balancer, CloudFront, Route 53, VPC endpoints, private link, and VPC peering.
- DevOps professionals should also know about transit gateway, transit VPC, site-to-site VPN, client VPN, and network automation.
- Network administrators should understand AWS Direct Connect, enhanced networking, hybrid connectivity, network performance improvement, and network security against DDoS and layer 7 attacks.
- VPC is a private network where EC2 instances reside, with each VPC having a CIDR range and a default local router for internal communication.
- Subnets should be created within VPC for launching EC2 instances, with each subnet belonging to a single availability zone.
- Public subnets have Internet access through an Internet gateway, while private subnets do not have direct Internet access.
- Load balancers reside in public subnets for high availability, while web/app servers are in private subnets and communicate with the Internet through the load balancer.
- Databases are placed in different availability zones for fault tolerance, with synchronous replication between master and standby databases.
- NAT devices in public subnets facilitate outbound Internet access for EC2 instances in private subnets, allowing them to communicate with the Internet indirectly.
14:45
AWS Networking: Gateways, VPNs, and Connectivity Options
- Two gateways are needed for connecting networks: a VGW and a router, termed customer gateway in AWS.
- IPSec VPN tunnel can be established between the two gateways, supporting high availability with two tunnels.
- Site-to-site VPN connectivity allows traffic flow over the internet, encrypted by IPSec protocol but lacks reliability due to varying internet quality.
- For consistent bandwidth and private connectivity to AWS, consider AWS Direct Connect, offering high-speed, low-latency links.
- Direct Connect locations, not owned by AWS but by neutral entities, connect to corresponding AWS region data centers with up to 100 Gbps links.
- Connect on-premise network to Direct Connect location for up to 1 Gbps to 10 Gbps consistent bandwidth connection to AWS.
- Client VPN endpoints in AWS enable remote work connections, allowing machines to access network resources as part of the network.
- VPC peering allows communication between multiple VPCs privately without internet access, simplifying network architecture.
- Transit gateway simplifies communication between multiple VPCs, acting as a hub for all VPCs to connect to each other and corporate data centers.
- VPC endpoint services like VPC endpoint gateway and VPC endpoint interfaces provide private access to AWS services, eliminating the need for internet routing.
