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Author: Ed Horley

ULA is Broken (in Dual-stack Networks)

I first started outlining some of the difficulties with Unique Local Addresses (ULA, RFC 4193) in the blog post “IPv6 ULA and NAT. Is It Better Than Global Unicast?” back in January of 2014. As a refresher, ULA is the special reserved prefix of fc00::/7, which is further divided into fc00::/8 (which is not supposed […]

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