Timing of AWS Network Firewall log delivery

A log file or log stream generally contains information about the requests that your firewall received during a given time period. The timing of Network Firewall log delivery varies by location type, averaging 3-6 minutes for Amazon CloudWatch Logs and Amazon Data Firehose and 8-12 minutes for Amazon Simple Storage Service buckets. In some cases, logs may take longer than these averages. When log entries are delayed, Network Firewall saves them and then logs them according to the date and time of the period in which the requests occurred, not the date and time when the logs are delivered.

Note

If your firewall doesn't filter traffic for a period of time, you don't receive logs for that period.

When creating a log file or stream, Network Firewall consolidates information for your firewall from all the endpoints that received traffic during the time period that the log covers.