Private S3 Access from EC2 Without Internet
A company wants to securely access an Amazon S3 bucket from an Amazon EC2 instance without accessing the internet. What should the company use to accomplish this goal?
Community Votes
100% of anonymous learners picked answer C. Votes are pick records left by other test-takers — they are not the verified answer.
Community Insight
The question tests private AWS service access, and the trap is choosing internet-oriented networking components (internet gateway, NAT gateway, VPN) that still depend on or expose internet paths.
This AWS Cloud Practitioner question tests how an Amazon EC2 instance reaches an Amazon S3 bucket without traversing the public internet. The page establishes that a VPC endpoint (option C) provides a private, direct connection from the VPC to S3 using AWS's private network.
The most common wrong pick is the NAT gateway (D), because learners associate it with 'no inbound internet'; however, a NAT gateway still sends traffic out through an internet gateway to reach S3 over the public internet, so it fails the 'without accessing the internet' requirement.
Community Discussion (3 comments)
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Expert Analysis
Why the Answer Is Correct
A VPC endpoint—specifically an S3 gateway endpoint—attaches to the VPC's route table and lets an Amazon EC2 instance reach the Amazon S3 bucket entirely over AWS's private network, with no public IP, internet gateway, or NAT device required. The endpoint stays fully private, which is exactly what the requirement 'without accessing the internet' demands, and access can still be restricted with bucket policies and endpoint policies. Because S3 gateway endpoints are offered at no additional hourly cost, this is also the standard well-architected pattern for private S3 access.Why the Other Options Are Wrong
A VPN connection (A) creates an encrypted tunnel to an on-premises network or another VPC; it does not itself deliver private access from an EC2 instance to S3, and it adds infrastructure the question never asks for. An internet gateway (B) is the opposite of what is needed—it is the component that explicitly allows internet access from the VPC, violating the requirement. A NAT gateway (D) is the most tempting distractor, but it lets private-subnet instances reach external services by routing outbound traffic through an internet gateway, so S3 traffic would still traverse the public internet; it is meant for reaching destinations outside AWS, not for private AWS service access.Community Comment Notes
The comment thread converged cleanly on option C, with its_tima explaining that "a VPC endpoint is a powerful cloud virtual device used in Amazon VPC to enable communication between instances" without internet connectivity. ShaiTay and d00b229 independently answered "C. VPC endpoint" with no dissenting reasoning offered. Because all 100 recorded votes chose C, the community consensus here aligns with the technical analysis rather than contradicting it.Official Reference
Exam Strategy
When a question includes the phrase 'without accessing the internet,' immediately look for a VPC endpoint or PrivateLink answer and eliminate anything containing 'gateway to the internet' (IGW) or outbound internet routing (NAT). Remember that S3 gateway endpoints are free, which makes them the default design choice.
Frequently Asked Questions
Why is a NAT gateway not sufficient for private S3 access?
A NAT gateway routes outbound traffic through an internet gateway, so requests to S3 still cross the public internet. Only a VPC endpoint keeps the path entirely inside AWS's network.
Which VPC endpoint type is used for Amazon S3?
Amazon S3 uses a gateway endpoint, attached to your route tables. A VPC endpoint for S3 requires no public IP and incurs no additional hourly charge.
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