Table of Contents
Question
A company wants to use an Amazon EC2 instance that has a pre-installed third-party firewall. Which AWS service or feature can provide this solution?
A. Security groups
B. AWS Marketplace
C. AWS Systems Manager
D. AWS Certificate Manager (ACM)
Answer
A. Security groups
Explanation
The correct answer is A. Security groups.
Amazon EC2 instances can be launched with pre-installed third-party firewalls, and security groups can be used to control inbound and outbound network traffic to and from the instance. Security groups act as a virtual firewall that can be applied to multiple instances within an AWS account, providing a centralized way to manage network security policies.
Here’s a detailed explanation:
AWS Marketplace (B) does not provide pre-installed third-party firewalls. Instead, it offers a variety of software solutions that can be installed on AWS resources, including EC2 instances.
AWS Systems Manager (C) is a service that provides a centralized way to manage and automate AWS resources, but it does not provide pre-installed third-party firewalls.
AWS Certificate Manager (ACM) (D) is a service that provides SSL/TLS certificates for AWS resources, but it does not provide pre-installed third-party firewalls.
Therefore, the correct answer is A. Security groups.
Here’s a comprehensive explanation of security groups and how they can be used to provide a pre-installed third-party firewall for EC2 instances:
Security groups act as a virtual firewall that can be applied to multiple instances within an AWS account. When an instance is launched with a security group, the security group defines which inbound and outbound network traffic is allowed or denied. Security groups can be created and managed using the AWS Management Console, the AWS CLI, or the AWS SDKs.
To use a pre-installed third-party firewall with an EC2 instance, the security group associated with the instance must allow inbound traffic on the ports used by the firewall. For example, if the third-party firewall uses port 22 for SSH traffic, the security group must allow inbound traffic on port 22.
Additionally, the security group can be configured to allow outbound traffic to the internet or to specific IP ranges, depending on the requirements of the application.
In summary, security groups provide a centralized way to manage network security policies for EC2 instances, and can be used to provide a pre-installed third-party firewall for EC2 instances.
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