Practical guides on AWS cost optimization, network topology, and compliance for engineering teams.
VPC Flow Logs record metadata about every network connection in your VPC — and they're the only source that tells you what your NAT Gateway is actually processing. Four Athena queries to find S3-via-NAT, cross-AZ traffic, internet egress by instance, and daily NAT cost breakdowns.
Read article →NAT Gateway silently processes traffic it was never meant to handle — S3 calls, AWS API traffic, ML checkpoints — because that's what the default private subnet setup produces. Here are the four patterns driving your bill and the exact commands to fix each one.
Read article →Most teams configure segmentation controls and then rely on an annual pen test to prove they work. QSAs increasingly ask how you know the controls are working today — not at the time of the last test. Here's what routing-plane evidence looks like and how to generate it automatically.
Read article →Transit Gateway route tables isolate environments at the TGW layer. But VPC peerings bypass that layer entirely — and they don't appear in the TGW console. One forgotten debugging peering is all it takes to create a direct path from staging into a PCI-scoped production VPC.
Read article →At seven VPCs nobody has a complete picture anymore. The AWS console shows you the parts but not the map — no cross-account view, no reachability analysis, no environment context. Here's how topology drift happens and how to get visibility back automatically.
Read article →We built a representative 7-VPC environment and ran one Netway scan. We found an isolation breach that bypasses Transit Gateway isolation, a CIDR conflict waiting to cause a routing failure, orphaned VPCs nobody knew about, and S3 traffic silently accumulating NAT charges. None of them were visible in the AWS console.
Read article →S3 traffic routing through NAT. Cross-AZ database queries. GPU training jobs paying internet egress rates. These patterns exist in most AWS environments — and AWS won't tell you which resources are responsible. Here's how to surface and fix them automatically.
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