AWS - VPC Fundamentals
You created a route table and associated it with a subnet, but instances in that subnet cannot access the internet. What is the most likely mistake?
You created a route table and associated it with a subnet, but instances in that subnet cannot access the internet. What is the most likely mistake?
medium📝 Debug Q14 of 15
Step-by-Step Solution
Solution:
Step 1: Check route table routes for internet access
Internet access requires a route to an internet gateway (igw) for 0.0.0.0/0.Step 2: Identify missing or incorrect routes
If the route to the internet gateway is missing, instances cannot reach the internet despite association.Final Answer:
The route table lacks a route to an internet gateway -> Option AQuick Check:
Internet needs 0.0.0.0/0 route to igw [OK]
Quick Trick: Check for 0.0.0.0/0 route to internet gateway [OK]
Common Mistakes:
MISTAKES- Assuming subnet association alone grants internet access
- Confusing NAT gateway with internet gateway routes
- Ignoring security group rules as cause
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