How Automatic Return Routing solves IP overlap

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Introduces Automatic Return Routing (ARR) as a closed beta feature for Cloudflare One customers. ARR solves the problem of IP address overlap in enterprise networks (mergers, extranets, cookie-cutter architectures) by using stateful tracking instead of traditional routing tables. It remembers the originating tunnel for each network flow, allowing return traffic to be sent back to the correct source without ambiguity. ARR is built on the new Unified Routing framework, which consolidates network-layer and user-space routing logic for improved performance and interoperability.