You have a private subnet with a NAT Gateway route, but instances cannot reach the internet. You notice the NAT Gateway's subnet does not have a route to the Internet Gateway. What should you do?

hard📝 Application Q9 of 15

AWS - VPC Fundamentals

AAdd a route in the NAT Gateway's public subnet route table to the Internet Gateway

BAdd a route in the private subnet to the Internet Gateway

CAssign public IPs to private subnet instances

DDelete the NAT Gateway and use a Virtual Private Gateway

Step-by-Step Solution

Solution:

Step 1: Understand NAT Gateway subnet routing
NAT Gateway resides in a public subnet that must route outbound traffic to Internet Gateway.
Step 2: Fix missing route
Adding route 0.0.0.0/0 to Internet Gateway in NAT Gateway's subnet route table enables internet access.
Final Answer:
Add a route in the NAT Gateway's public subnet route table to the Internet Gateway -> Option A
Quick Check:
NAT Gateway subnet needs route to Internet Gateway [OK]

Quick Trick: Public subnet with NAT Gateway must route to Internet Gateway [OK]

Common Mistakes:

Adding Internet Gateway route to private subnet
Assigning public IPs to private instances unnecessarily
Replacing NAT Gateway with Virtual Private Gateway

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More AWS Quizzes

You have a private subnet with a NAT Gateway route, but instances cannot reach the internet. You notice the NAT Gateway's subnet does not have a route to the Internet Gateway. What should you do?

Step 1: Understand NAT Gateway subnet routing

Step 2: Fix missing route

Final Answer:

Quick Check:

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