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RADIUS Over DTLS

RADIUS Over DTLS. RADEXT - Interim. Alan DeKok FreeRADIUS. draft-ietf-radext-dtls-00 Submitted. Changes from draft-dekok-radext-dtls-02 Name / date STATUS -> RFC 5997 Removed RFC 5378 disclaimer. Open Issues. Need to re-sync with RTLS draft Double-check consistency, etc.

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RADIUS Over DTLS

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  1. RADIUS Over DTLS • RADEXT - Interim Alan DeKok FreeRADIUS

  2. draft-ietf-radext-dtls-00 Submitted • Changes from draft-dekok-radext-dtls-02 • Name / date • STATUS -> RFC 5997 • Removed RFC 5378 disclaimer

  3. Open Issues • Need to re-sync with RTLS draft • Double-check consistency, etc. • Port re-use issues • Use the same port? Different ports? • Would like review from Stig Venaas (radsecproxy)

  4. Implementations • RadSecProxy • Jradius • FreeRADIUS (ongoing, expected Q1. 2011)

  5. Questions?

  6. Backup slides

  7. Changes from RadSec • Mostly clear-cut changes • TCP ➙ UDP, RadSec ➙ RDTLS, TLS ➙ DTLS • Some differences • re-uses RADIUS port • retains code ➙ port restrictions

  8. Magic • RADIUS & DTLS on the same port • key: { src (ip, port), dst (ip, port) } -> proto • proto = DTLS or RADIUS • works for live “connections” • proto is DTLS or RADIUS • MUST NOT transport both over same key

  9. More Magic • What about new sessions? • key: { src (ip, port) + dst (ip, port) } -> ??? • Look at packet contents • (packet[0] == 22) ? DTLS : RADIUS

  10. Step by Step Guide • Draft outlines full management algorithm • When client is known to support a protocol • Includes processing of legacy RADIUS • Outlines management of upgrade path

  11. What it does (not) do • ✓ Future-proof security via TLS • ✓ Backwards compatibility • ✓ Simple migration path • ✖ Order, reliability, fragmentation

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