AWS Network Visibility Using VPC Flow Logs

AWS Network Visibility Using VPC Flow Logs: Topology, and Drill-to-Flow Visibility with WhiteOwl Networks

As more workloads move to AWS, network visibility increasingly depends on understanding VPC-level traffic, not just traditional devices. While AWS VPC Flow Logs provide powerful raw telemetry, turning that data into actionable insight—especially across accounts, regions, and VPCs—remains a challenge.

WhiteOwl Networks bridges that gap by combining VPC Flow Logs, AWS metadata, and topology awareness into a single, correlated view—allowing teams to move from cloud architecture to individual flows in just a few clicks.

What Are AWS VPC Flow Logs?

AWS VPC Flow Logs capture IP traffic flowing through:

  • Elastic Network Interfaces (ENIs)
  • Subnets
  • VPCs

Flow logs include information such as:

  • Source and destination IP
  • Source and destination port
  • Protocol
  • Bytes and packets
  • Accept or reject action
  • Interface ID
  • Timestamps

While this data is extremely valuable, on its own it lacks context:

  • What workload does this ENI belong to?
  • Which subnet or AZ is this traffic crossing?
  • Is this traffic flowing between VPCs, subnets, or external networks?
  • Which application or service is impacted?

This is where WhiteOwl adds significant value.

Collecting VPC Flow Logs with Amazon SQS

WhiteOwl integrates natively with AWS by using Amazon SQS as a scalable, reliable ingestion mechanism for VPC Flow Logs.

How It Works

  1. VPC Flow Logs are configured in AWS
  2. Logs are delivered to CloudWatch Logs or S3
  3. AWS forwards flow log records to SQS
  4. WhiteOwl consumes flow logs from SQS in near real time

Using SQS provides:

  • High-throughput ingestion
  • Built-in buffering and durability
  • Backpressure handling during spikes
  • Decoupling between AWS log delivery and analytics

This allows WhiteOwl to ingest flow data reliably—even at large scale.

Enriching Flows with AWS Metadata

Raw flow logs are only the starting point. WhiteOwl continuously collects AWS VPC metadata and correlates it with flow records to provide full context.

Metadata enrichment includes:

  • VPC IDs and names
  • Subnets and CIDR ranges
  • Availability Zones
  • ENIs
  • EC2 instances
  • Load balancers
  • Security groups
  • Route tables
  • VPC peering connections
  • Transit gateways

By correlating flow records with this metadata, WhiteOwl transforms low-level logs into workload-aware network visibility.

https://whiteowlnetworks.net/docs/Topology/cloud-topology

Building VPC Topology Automatically

Using enriched flow data and AWS metadata, WhiteOwl automatically builds VPC-level topology, including:

  • VPC-to-VPC communication
  • Subnet-to-subnet traffic
  • AZ-level paths
  • Transit Gateway links
  • Peered VPC relationships
  • Internet and NAT Gateway paths

This topology is dynamic and continuously updated as AWS infrastructure changes.

No manual diagrams. No stale documentation.

One of the most powerful capabilities WhiteOwl provides is drill-to-flow visibility directly from topology.

From a VPC topology view, operators can:

  • Click a VPC link, subnet connection, or gateway
  • Instantly drill down to:
    • Individual flows
    • Top talkers
    • Protocols and ports
    • Traffic volume and trends
    • Accept vs reject traffic

This makes it easy to answer questions like:

  • Why is traffic increasing between these two VPCs?
  • Which workloads are using a transit gateway?
  • What traffic is being denied by security groups or NACLs?
  • Is latency or packet loss correlated with specific paths?

Topology becomes interactive—not just visual.

Unified Visibility Across Cloud and On-Prem

Because WhiteOwl also ingests:

  • NetFlow / IPFIX / sFlow
  • SNMP
  • Logs
  • Synthetic transactions
  • Enriched packet probe data

AWS VPC visibility lives in the same single pane of glass as on-prem and hybrid networks.

This enables:

  • End-to-end traffic analysis
  • Hybrid path visibility
  • Consistent workflows across environments
  • Faster root cause analysis

From Raw Logs to Real Insight

AWS VPC Flow Logs are powerful—but only when paired with context, correlation, and visualization.

By combining:

  • Scalable SQS-based ingestion
  • Continuous AWS metadata enrichment
  • Automatic topology generation
  • Drill-to-flow analytics

WhiteOwl Networks turns raw cloud telemetry into actionable network intelligence.

This is cloud visibility designed for how modern networks actually operate.