This blog post discusses how NetworkManager uses eBPF (extended Berkeley Packet Filter) to implement CLAT (Customer-side Translator) and the IPv6-mostly architecture. The author explains the challenges with IPv6 adoption, the mechanics of IPv6-mostly, and how these innovations serve as a pathway to transition from dual-stack networks to IPv6-only environments. It highlights the technical workings behind packet translation and network management to provide efficient IPv4 connectivity on an IPv6-dominant network.