What does VPC Flow Logs capture information about?

VPC Flow Logs provide detailed information about traffic patterns and IP communication within a Virtual Private Cloud (VPC) in AWS. This includes capturing data about the source and destination IP addresses, source and destination ports, protocols, the number of packets and bytes transferred, and whether the traffic was accepted or rejected by security groups and network access control lists (ACLs).

This information is crucial for network monitoring, troubleshooting, and security analysis as it helps identify and analyze trends in traffic behavior, detect anomalies, and optimize network performance. By understanding the communication patterns, you can better manage access and ensure that your VPC is configured securely and efficiently.

While metrics such as packet loss rates, volume of traffic in and out of instances, and latency can be important aspects of network performance, VPC Flow Logs primarily focus on the details of IP communication, making it an essential tool for analyzing traffic patterns within your VPC.