What is a NAT gateway?

NAT Gateway is a highly available AWS managed service that makes it easy to connect to the Internet from instances within a private subnet in an Amazon Virtual Private Cloud (Amazon VPC). Previously, you needed to launch a NAT instance to enable NAT for instances in a private subnet.

What is NAT in layman’s terms?

NAT stands for network address translation. It’s a way to map multiple local private addresses to a public one before transferring the information.

What is a gateway for dummies?

Starts here1:46What is a Gateway? Why is it Important? – YouTubeYouTubeStart of suggested clipEnd of suggested clip55 second suggested clipAnd customs is the gateway that facilitates travel or in this case communication between networksMoreAnd customs is the gateway that facilitates travel or in this case communication between networks when one network wants to communicate with another. The data packet is passed to the Gateway.

Do you need a NAT gateway?

You only need a NAT Gateway if your Lambda function will be accessing the internet. All your public subnets must route to an Internet Gateway for non-local addresses. This is what makes the subnet public. The NAT Gateway needs to be deployed into one of these public subnets so it has access to the internet.

Why is NAT important?

NAT is a very important aspect of firewall security. It conserves the number of public addresses used within an organization, and it allows for stricter control of access to resources on both sides of the firewall.

What is the use of gateway in a network?

A gateway is a network node used in telecommunications that connects two networks with different transmission protocols together. Gateways serve as an entry and exit point for a network as all data must pass through or communicate with the gateway prior to being routed.

Why do I need an internet gateway?

An internet gateway serves two purposes: to provide a target in your VPC route tables for internet-routable traffic, and to perform network address translation (NAT) for instances that have been assigned public IPv4 addresses. An internet gateway supports IPv4 and IPv6 traffic.