Log your VPC DNS queries with Route 53 Resolver Query Logs

Log your VPC DNS queries with Route 53 Resolver Query Logs

The Amazon Route 53 team has just launched a new feature called Route 53 Resolver Query Logs, which will let you log all DNS queries made by resources within your Amazon Virtual Private Cloud. Whether it’s an Amazon Elastic Compute Cloud (EC2) instance, an AWS Lambda function, or a container, if it lives in your Virtual Private Cloud and makes a DNS query, then this feature will log it; you are then able to explore and better understand how your applications are operating.

The Amazon Route 53 team has just launched a new feature called Route 53 Resolver Query Logs, which will let you log all DNS queries made by resources within your Amazon Virtual Private Cloud. Whether it’s an Amazon Elastic Compute Cloud (EC2) instance, an AWS Lambda function, or a container, if it lives in your Virtual Private Cloud and makes a DNS query, then this feature will log it; you are then able to explore and better understand how your applications are operating.

Our customers explained to us that DNS query logs were important to them. Some wanted the logs so that they could be compliant with regulations, others wished to monitor DNS querying behavior, so they could spot security threats. Others simply wanted to troubleshoot application issues that were related to DNS. The team listened to our customers and have developed what I have found to be an elegant and easy to use solution.

From knowing very little about the Route 53 Resolver, I was able to configure query logging and have it working with barely a second glance at the documentation; which I assure you is a testament to the intuitiveness of the feature rather than me having any significant experience with Route 53 or DNS query logging.

You can choose to have the DNS query logs sent to one of three AWS services: Amazon CloudWatch LogsAmazon Simple Storage Service (S3), and Amazon Kinesis Data Firehose. The target service you choose will depend mainly on what you want to do with the data. If you have compliance mandates (For example, Australia’s Information Security Registered Assessors Program), then maybe storing the logs in Amazon Simple Storage Service (S3) is a good option. If you have plans to monitor and analyze DNS queries in real-time or you integrate your logs with a 3rd party data analysis tool like Kibana or a SEIM tool like Splunk, than perhaps Amazon Kinesis Data Firehose is the option for you. For those of you who want an easy way to search, query, monitor metrics, or raise alarms, then Amazon CloudWatch Logs is a great choice, and this is what I will show in the following demo.

amazon cloudwatch amazon route 53 kinesis data firehose amazon web services

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