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NAT Traversal in HIP

NAT Traversal in HIP. Xiang LIU TML/HIIT (frogsir@gmail.com) ‏. Agenda. On Current Internet Traversal technologies (General vs. HIP) ‏ DEMO details. On Current Internet. Popular of NAT(IPv4) ‏ NATs understand TCP & UDP, but not HIP. Behave/MMusic NAT traversal Solution.

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NAT Traversal in HIP

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  1. NAT Traversal in HIP Xiang LIU TML/HIIT (frogsir@gmail.com)‏

  2. Agenda • On Current Internet • Traversal technologies (General vs. HIP)‏ • DEMO details

  3. On Current Internet • Popular of NAT(IPv4)‏ • NATs understand TCP & UDP, but not HIP

  4. Behave/MMusic NAT traversal Solution • STUN (Hole Punching Technology)‏ • TURN • ICE • Others (configure in NAT box)‏

  5. Solutions for HIP • HIP over UDP (port 50500)‏ • STUN <----> RVS • TURN <---->HIP relay(FULL relay)‏ • ICE (design for SIP) <----> HIP ICE • code borrowed from PJ project

  6. Demo Set Up FROG (HIP RELAY) VM ware NAT CRASH (VM host)‏ OOPS (VM host)‏

  7. DEMO Background • Preconditions (registration): • FROG offers HIP Relay service • All the basic HIP exchange will go thorough FROG • Crash knows the HIT of OOPS • Crash Knows the IP of OOPS, which actually belongs to FROG (public IP) • Phases: • Locator exchange, candidates pairing, reachability testing

  8. Registration • OOPS register itself to FROG using the basic exchange. • OOPS sends keep-live messages to refresh the NAT state

  9. Locator exchange • Crash --I1-- >FROG(relay server) ---I1---> OOPS • Crash <--R1--FROG<---R1--- OOPS • Crash –I2-->FROG---I2--- >OOPS • Crash <--R2--FROG<---R2--- OOPS • Locators are exchanged in R1 and I2

  10. FULL Relay FROG (HIP RELAY) VM ware NAT CRASH (VM host)‏ OOPS (VM host)‏

  11. ICE Session • After the basic exchange, the OOPS and Crash start ICE session at the same time. • Reachability testing starts.

  12. Reachability Testing FROG (HIP RELAY) VM ware NAT CRASH (VM host)‏ OOPS (VM host)‏

  13. Establish Security Policies and Associations • ICE will give the best IP:port pair for the SA connection.

  14. SP/SA FROG (HIP RELAY) VM ware NAT CRASH (VM host)‏ OOPS (VM host)‏

  15. Questions?

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