NetZero Tool Auto-Generates Kubernetes Network Policies Using Go and eBPF

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A developer has open-sourced NetZero, a zero-configuration tool written in Go and C that automates the creation of Kubernetes NetworkPolicy files for zero-trust environments. The tool addresses a common pain point where manually writing network policies often leads to missed dependencies and production outages. NetZero uses eBPF to hook into the Linux kernel at the socket-connection level, capturing outbound traffic metadata such as PID, destination IP, and port with minimal overhead. A Go-based user-space layer then enriches this raw data by querying the host's /proc filesystem and performing reverse DNS lookups to map IPs to stable domain names. After a test run completes, the tool aggregates the observed traffic and exports a ready-to-use Kubernetes YAML manifest reflecting actual runtime behavior.

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