NAT device helps us to enable instances in a private subnet to connect to the internet:
We all know that the instances which are in the private subnet have the main route table pointing the VPC subnet CIRD to the local VPC as the target ie why it doesn't have internet access and the people outside cannot access these instances.
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Along with that, it helps us during software updates.
or if we want to use other AWS services.
and it also helps to Forward traffic from the instances in the private subnet to the internet or other AWS services and also sends the response back to the instances.
So for this AWS offers two kinds of NAT devices:
a NAT gateway
a NAT instance
And AWS recommends that we make use of NAT gateways, as they provide better availability and bandwidth over NAT instances.
Don't worry we will get to know about both of them
VPC Sessions :
▶ PART 1: What is a VIRTUAL PRIVATE CLOUD? Amazon VPC | Visual Explanations :
https://youtu.be/nmhXCqxKe-M
▶ PART 2: WHAT IS A CIDR IN AWS? | VPC PART 2 | Visual Explanations
https://youtu.be/N-BppnZ8AoQ
▶ PART 3: WHAT IS A VPC SUBNET AND HOW TO ASSIGN SUBNETS IN VPC? VPC PART 3 | Visual Explanations
https://youtu.be/onALWhdukHE
▶ PART4: AWS SAVINGS PLAN | COMPUTE AND EC2 INSTANCE SAVINGS PLANS | Visual Explanations
https://youtu.be/cqA423WNHo8
▶ PART5: HOW TO CREATE VPC and SUBNET | HANDS-ON DEMO
https://youtu.be/pUQjavImhSc
▶ PART6: WHAT IS INTERNET GATEWAY? WHAT ARE ROUTE TABLES? WHAT IS PUBLIC SUBNET? | Visual Explanations
https://youtu.be/CAbumERzqqQ
▶ PART7: HOW TO PROVIDE INTERNET ACCESS TO INSTANCES AT VPC PRIVATE SUBNET? | NAT GATEWAY | NAT INSTANCE
https://youtu.be/mtvlEsgn_C4
▶ PART8: HOW TO CREATE NAT GATEWAY? | HAND ON DEMO
https://youtu.be/_JumK1gOYW8
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