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Cloudflare introduces Automatic Return Routing (ARR), a stateful tracking solution that resolves IP address overlap in enterprise private networks without NAT or VRF configuration.
•IP overlap commonly occurs in mergers, extranets, and cookie-cutter branch architectures where multiple sites share identical subnets like 10.0.1.0/24
•Traditional fixes (VRF, NAT) require significant administrative overhead and are brittle at scale
•ARR uses stateful flow tracking to record the originating tunnel of each connection, enabling return traffic to bypass routing table lookups entirely
•Built on Cloudflare's new Unified Routing framework (Apollo), which moved routing decisions from kernel-level to userspace, yielding 3-5x performance improvements internally
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Currently in closed beta supporting overlapping IPs accessing the Internet via Secure Web Gateway, with private data center access and mid-flow failover planned
This summary was automatically generated by AI based on the original article and may not be fully accurate.
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