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Feb 26, 2022 · Backend Development

How to Handle Multiple NICs in Go: Exclude Link‑Local IPs and Bind Traffic

This article explains why Go programs may pick unusable link‑local addresses on machines with multiple network interfaces, shows how to filter them out, and presents three practical solutions—including per‑NIC binding, Docker container isolation, and DNAT/SNAT rules—to control inbound and outbound traffic.