Analyzing Client IP Addresses in AWS Behind an Application Load Balancer
Question
A company has a number of EC2 Instances sitting behind an Application Load Balancer.
They want their IT Infrastructure team to analyse the client IP addresses for the requests coming into the load balancer.
How can you accomplish this? Choose 2 answers from the options given below.
Answers
Explanations
Click on the arrows to vote for the correct answer
A. B. C. D.To analyze the client IP addresses for requests coming into an Application Load Balancer (ALB) in AWS, we can use the following steps:
Enable the logs for the Load Balancer The first step is to enable access logs for the Application Load Balancer. Access logs capture detailed information about requests, including the client IP address, request path, response status code, and more. You can enable access logs using the AWS Management Console or the AWS CLI. When you enable access logs, you can choose the S3 bucket and prefix for the logs.
Use the AWS Athena service to query the logs Once the access logs are enabled and are being written to an S3 bucket, you can use the AWS Athena service to query the logs. Athena is an interactive query service that allows you to analyze data in S3 using SQL. You can create a table in Athena that points to the access logs in S3 and use SQL queries to extract the client IP addresses from the logs.
To create a table in Athena, you will need to define the schema of the access logs. The schema includes the column names and data types for the fields in the logs. The AWS documentation provides a sample schema for ALB logs.
Use the AWS Load balancer service to send the logs to DynamoDB (optional) Another option is to use the AWS Load Balancer service to send the logs directly to DynamoDB. When you enable access logs for an ALB, you can choose to send the logs to an S3 bucket or a Kinesis Data Firehose delivery stream. Kinesis Data Firehose can write the logs to a number of destinations, including DynamoDB.
Create a view in DynamoDB to check for the client IP address (optional) If you choose to send the logs to DynamoDB, you can create a view in DynamoDB to extract the client IP addresses. A view is a virtual table that is based on an existing table or a set of tables. In DynamoDB, you can use a view to project a subset of the data in a table and apply filters to the data. You can create a view that includes only the client IP addresses from the access logs and use the view to query the data.
