SubnetGuard

SubnetGuard is a web app that continuously audits your cloud and on-prem networks for subnetting and IPAM mistakes that cause outages: overlapping CIDRs, exhausted subnets, bad VPC/VNet peering routes, mis-sized subnets, and DHCP scope drift. Connect AWS, Azure, GCP, and common IPAM sources, then get a single “blast radius” view showing what will break if you add a new subnet, peer a network, or expand CIDR ranges. It generates change-safe recommendations (e.g., new non-overlapping CIDRs, split/resize plans, migration steps) and produces human-readable change tickets for NetOps/DevOps. This is not a learning tool; it’s a guardrail for teams moving fast with Terraform and multiple clouds. Expect a narrow focus: subnetting correctness and IP space hygiene, not full network monitoring.