IPv6 Neighbor Discovery Protocol (NDP) Proxy Key Features Multi-Segment Support - Supports one upstream and multiple downstream interfaces. NDP Proxying - Relays Neighbor Solicitation and Neighbor Advertisement messages between interfaces for transparent address resolution across segments. Responds locally for router and client addresses. DAD Proxying - Forwards DAD probes between interfaces and responds immediately when address conflicts are detected in cache. RA Proxying - Forwards Router Solicitations and unicast/multicast Router Advertisements to enable SLAAC autoconfiguration of clients. Forwarded RAs carry the RFC 4389 Proxy (P) flag. An incoming P flag is logged in debug mode but does not alter forwarding, allowing proxies to be chained while per-host learning directs traffic. Dynamic Prefix Learning - Learns valid prefixes from Router Advertisements and expires them automatically. Handles temporary RFC 4941 addresses and changing prefixes without loss of connectivity. Static Prefix Support - Manually trusted IPv6 prefixes and upstream router link-local addresses replace corresponding RA-learned state. Static prefixes permit downstream host learning and can also be used by the prefix responder. Route Management - Installs and updates per-host /128 routes. PF Table Management - Add learned IP addresses to pf tables.
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Binary packages can be installed with the high-level tool pkgin (which can be installed with pkg_add) or pkg_add(1) (installed by default). The NetBSD packages collection is also designed to permit easy installation from source.
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