AWS - Security Groups and Network ACLs
If a security group allows inbound SSH (port 22) from a specific IP, what happens when the instance responds to that SSH request?
If a security group allows inbound SSH (port 22) from a specific IP, what happens when the instance responds to that SSH request?
medium📝 Predict Output Q13 of 15
Step-by-Step Solution
Solution:
Step 1: Recall stateful nature of security groups
Security groups track connections and allow return traffic automatically.Step 2: Apply to SSH inbound and response outbound
Inbound SSH allowed means response outbound traffic is automatically allowed without extra rules.Final Answer:
The response is automatically allowed due to stateful behavior -> Option BQuick Check:
Inbound SSH allows automatic response outbound [OK]
Quick Trick: Inbound allows return traffic automatically [OK]
Common Mistakes:
MISTAKES- Thinking outbound rules must explicitly allow return traffic
- Confusing inbound and outbound directions
- Assuming NAT gateway is needed for return traffic
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