The blog post introduces the key features and improvements in Calico v3.31, focusing on the integration of eBPF (Extended Berkeley Packet Filter) and nftables, which enhance network performance and security. It highlights advancements in network policy management and observability, aiming to streamline Kubernetes networking capabilities.

Qtap is an eBPF agent designed to capture and analyze traffic within the Linux kernel, providing insights into egress traffic without modifying applications or managing certificates. It enables security audits, debugging, API development, and troubleshooting by displaying unencrypted data and operational metrics in real time. The project is in early development and welcomes community feedback and contributions.