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GIAC GCFR Exam - Topic 6 Question 51 Discussion

Actual exam question for GIAC's GCFR exam
Question #: 51
Topic #: 6
[All GCFR Questions]

An engineer is troubleshooting a complaint that a web server in AWS cannot receive incoming traffic, but the server can connect to the internet otherwise. What is needed to solve this problem?

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Suggested Answer: C

by Curtis at Jan 05, 2026, 05:16 AM

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Marcelle
3 days ago
C) Network Security Group is the solution. You need to ensure the security rules are properly configured to allow incoming traffic to the web server.
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Krissy
8 days ago
B) NAT Gateway is the way to go. It provides a secure way for the web server to access the internet, which is essential for troubleshooting the issue.
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Gracia
13 days ago
D) Internet Gateway is the correct answer. The issue is likely with the internet connectivity, so an Internet Gateway is needed to allow the web server to receive incoming traffic.
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Carli
18 days ago
I definitely recall that VPC Subnet settings can affect traffic, but I’m leaning towards the Internet Gateway being the key here.
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Hassie
24 days ago
NAT Gateway seems like it could be relevant, but I feel like it’s more for outbound traffic. I’m a bit confused.
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Karl
29 days ago
I remember practicing a similar question where the Internet Gateway was crucial for incoming traffic. Could that be the answer here?
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Dong
1 month ago
I think the issue might be related to the Network Security Group, but I'm not entirely sure how to check the inbound rules.
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Antione
1 month ago
Hmm, this is a tough one. I'm not totally sure, but I'm thinking it might have to do with the network security group or the NAT gateway. I'll need to review my notes on AWS networking to see if I can figure this out.
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Mayra
1 month ago
I've seen issues like this before, and my first thought is that it's probably an issue with the network configuration. I'm leaning towards the internet gateway as the solution, since that's what controls the flow of traffic in and out of the VPC.
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Adelle
2 months ago
Okay, let's see. If the server can connect to the internet, then the issue is probably with how it's receiving incoming traffic. I'm guessing it has to do with the network setup, so I'd lean towards either the VPC subnet or the internet gateway as the solution.
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Rodrigo
2 months ago
Hmm, this seems tricky. I'm not totally sure what the right answer is, but I'm thinking it might have to do with the network configuration and how the server is set up to handle incoming requests. I'll need to think this through carefully.
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Crista
2 months ago
I think the key here is to look at the connectivity of the web server. Since it can connect to the internet, the issue is likely with how it's receiving incoming traffic, so I'd focus on options related to that.
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