Given a security group with an outbound rule allowing TCP traffic on port 443 to 0.0.0.0/0, what happens when an instance tries to connect to an HTTPS website?

medium📝 Predict Output Q4 of 15

AWS - Security Groups and Network ACLs

AThe connection is allowed and HTTPS traffic flows out

BThe connection is blocked because inbound rules are missing

CThe connection is blocked because port 443 is not allowed inbound

DThe connection is allowed only if the source IP is in the inbound rules

Step-by-Step Solution

Solution:

Step 1: Understand outbound rule effect
Outbound rule allowing TCP port 443 to 0.0.0.0/0 permits HTTPS traffic to leave the instance.
Step 2: Confirm inbound rules for response
Inbound rules do not block response traffic for established connections by default.
Final Answer:
The connection is allowed and HTTPS traffic flows out -> Option A
Quick Check:
Outbound TCP 443 allows HTTPS out [OK]

Quick Trick: Outbound rules control outgoing HTTPS traffic [OK]

Common Mistakes:

MISTAKES

Confusing inbound with outbound rules
Assuming inbound needed for outgoing connections

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More AWS Quizzes

Given a security group with an outbound rule allowing TCP traffic on port 443 to 0.0.0.0/0, what happens when an instance tries to connect to an HTTPS website?

Step 1: Understand outbound rule effect

Step 2: Confirm inbound rules for response

Final Answer:

Quick Check:

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