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VPC Flow Logs
we are introducing Flow Logs for the Amazon Virtual Private Cloud.  Once enabled for a particular VPC, VPC subnet, or Elastic Network Interface (ENI), relevant network traffic will be logged to CloudWatch Logs for storage and analysis by your own applications or third-party tools.

You can create alarms that will fire if certain types of traffic are detected; you can also create metrics to help you to identify trends and patterns. The information captured includes information about allowed and denied traffic (based on security group and network ACL rules). It also includes source and destination IP addresses, ports, the IANA protocol number, packet and byte counts, a time interval during which the flow was observed, and an action (ACCEPT or REJECT).
ec2  aws  vpc  logging  tracing  ops  flow-logs  network  tcpdump  packets  packet-capture 
june 2015 by jm
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