VPC Flow Logs
VPC Flow Logs is an AWS service that captures information about the IP traffic going to and from network interfaces in a Virtual Private Cloud (VPC). It logs metadata such as source and destination IP addresses, ports, protocol, and packet counts, enabling network monitoring, troubleshooting, and security analysis. The logs are stored in Amazon CloudWatch Logs or Amazon S3 for further processing and analysis.
Developers should use VPC Flow Logs when they need to monitor network traffic patterns, diagnose connectivity issues, or enhance security in AWS environments. Specific use cases include identifying unauthorized access attempts, analyzing traffic flows for compliance, and troubleshooting network ACL or security group misconfigurations in VPCs.