AWS - Security Groups and Network ACLs
Which protocol must be allowed in an inbound rule to permit SSH access to an EC2 instance?
Which protocol must be allowed in an inbound rule to permit SSH access to an EC2 instance?
easy📝 Conceptual Q2 of 15
Step-by-Step Solution
Solution:
Step 1: Identify SSH protocol
SSH uses TCP protocol on port 22 for secure shell access.Step 2: Match protocol to inbound rule
Inbound rule must allow TCP on port 22 to enable SSH connections.Final Answer:
TCP -> Option CQuick Check:
SSH uses TCP protocol [OK]
Quick Trick: SSH requires TCP protocol on port 22 inbound [OK]
Common Mistakes:
- Choosing UDP or ICMP instead of TCP
- Allowing HTTP instead of SSH protocol
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