RPKI-to-Router Protocol (RTR)

Also known as: RTR

RPKI-to-Router (RTR), defined in RFC 8210, is a lightweight TCP protocol that feeds RPKI validation state from a local Relying Party cache to BGP routers, letting them classify announcements as Valid, Invalid or NotFound. RTR is the last-mile mechanism that turns ROA data into enforceable routing policy on IPX/GRX borders.

Categories: Security ControlsProtocols and StandardsInternet and Routing

RPKI-to-Router in context

Security controls span signaling firewalls (SS7/Diameter/GTP screening), transport encryption (IPsec, TLS, PRINS), identity and access on OSS/BSS, and monitoring at both packet and log level. Controls are audited against GSMA FS.11/FS.19/FS.20/FS.36.

Telecom security is written into standards from 3GPP, GSMA, ETSI, IETF and ITU-T. Understanding which body owns which specification, and how they interlock, is essential for both design and audit work.

To place RPKI-to-Router in the wider telecom-security picture, review OSPF, ROA, IPv6, TR-069, 3G and A5/1: each entry cross-references back to this page so you can walk the topic in either direction.

Related terms

Related topic hubs

  • Roaming Security IPX/GRX interconnect risk, home-routed vs local-breakout, SEPP.
  • GTP Security GTP-C/GTP-U threats across S5/S8, N3/N9 and GRX/IPX borders under GSMA FS.20.
  • Diameter Security 4G/LTE Diameter threats across IPX/roaming and DEA defenses.
  • GTP Firewall GSMA FS.20 GTP-C/GTP-U screening on GRX/IPX borders.

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