Title

  Test IKEv2.EN.I.1.1.3.4: Close connections when receiving INITIAL_CONTACT
  Part A: (ADVANCED)

Purpose

  To verify an IKEv2 device closes connections when receiving INITIAL_CONTACT.

References

  * [RFC 4306] - Sections 2.1, 2.2 and 2.4
  * [RFC 4718] - Sections 7.9

Test Setup

  * Network Topology
      Connect the devices according to the Common Topology.
  * Configuration
      In each part, configure the devices according to the Common Configuration.
  * Pre-Sequence and Cleanup Sequence
      IKEv2 on the NUT is disabled after each part.

Procedure

   NUT                  TN1
(End-Node)           (End-Node)
    |                    |
    |------------------->| IKE_SA_INIT request (HDR, SAi1, KEi, Ni)
    |                    | (Judgement #1)
    |<-------------------| IKE_SA_INIT Response (HDR, SAr1, KEr, Nr)
    |                    | (Packet #1)
    |                    |
    |------------------->| IKE_AUTH request (HDR, SK {IDi, AUTH, N, SAi2, TSi, TSr})
    |                    | (Judgement #2)
    |<-------------------| IKE_AUTH Response (HDR, SK {IDr, AUTH, N, SAr2, TSi, TSr})
    |                    | (Packet #2)
    |                    |
    |<-------------------| IPsec {Echo Request}
    |                    | (Packet #3)
    |------------------->| IPsec {Echo Reply}
    |                    | (Judgement #3)
    |                    |
    |------------------->| IKE_SA_INIT request (HDR, SAi1, KEi, Ni)
    |                    | (Judgement #4)
    |<-------------------| IKE_SA_INIT Response (HDR, SAr1, KEr, Nr)
    |                    | (Packet #4)
    |                    |
    |------------------->| IKE_AUTH request (HDR, SK {IDi, AUTH, N(INITIAL_CONTACT), SAi2, TSi, TSr})
    |                    | (Judgement #5)
    |<-------------------| IKE_AUTH Response (HDR, SK {IDr, AUTH, N, SAr2, TSi, TSr})
    |                    | (Packet #5)
    |                    |
    |<-------------------| IPsec {Echo Request}
    |                    | (Packet #6)
    |--------X           | IPsec {Echo Reply}
    |                    | (Judgement #6)
    |                    |
    |<-------------------| IPsec {Echo Request}
    |                    | (Packet #7)
    |------------------->| IPsec {Echo Reply}
    |                    | (Judgement #7)
    |                    |
    V                    V

    
 N: USE_TRANSPORT_MODE



Packet #1
See Common Packet #2


Packet #2
See Common Packet #4


Packet #3
See Common Packet #19


Packet #4
See Common Packet #2


Packet #5
See Common Packet #4


Packet #6
See Common Packet #19
This packet is cryptographically protected by the
CHILD_SA negotiated at Step 1 to Step 5.


Packet #7
See Common Packet #19
This packet is cryptographically protected by the
CHILD_SA negotiated at Step 9 to Step 13.

  Part A: (ADVANCED)
       1.  NUT starts to negotiate with TN1 by sending IKE_SA_INIT request.
       2.  Observe the messages transmitted on Link A.
       3.  TN1 responds with an IKE_SA_INIT response to the NUT.
       4.  Observe the messages transmitted on Link A.
       5.  After reception of IKE_AUTH request from the NUT, TN1 responds with an IKE_AUTH
           response to the NUT
       6.  TN1 transmits an Echo Request with IPsec ESP using corresponding algorithms to NUT.
       7.  Observe the messages transmitted on Link A.
       8.  NUT starts to negotiate with TN1 by sending IKE_SA_INIT request. If rebooting NUT to
           start negotiation again is needed, it is possible to reboot NUT.
       9.  NUT transmits IKE_SA_INIT request to the NUT.
       10. Observe the messages transmitted on Link A.
       11. After reception of IKE_SA_INIT request from the NUT, TN1 responds with an
           IKE_SA_INIT response to the NUT.
       12. Observe the messages transmitted on Link A.
       13. After reception of IKE_AUTH Request from the NUT, TN1 responds with an IKE_AUTH
           response to the NUT.
       14. TN1 transmits an Echo Request with IPsec ESP using the first negotiated algorithm.
       15. Observe the messages transmitted on Link A.
       16. TN1 transmits an Echo Request with IPsec ESP using the second negotiated algorithm.
       17. Observe the messages transmitted on Link A.

Observable Result

  Part A
    Step 2: Judgment #1
      The NUT transmits an IKE_SA_INIT request including "ENCR_3DES",
      "PRF_HMAC_SHA1", "AUTH_HMAC_SHA1_96" and "D-H group 2" as proposed
      algorithms.
  
    Step 4: Judgment #2
      The NUT transmits an IKE_AUTH request including "ENCR_3DES",
      "AUTH_HMAC_SHA1_96" and "No Extended Sequence Numbers" as proposed
      algorithms.
  
    Step 7: Judgment #3
      The NUT transmits an Echo Reply with IPsec ESP using corresponding algorithms.
      Step 10: Judgment #4
      The NUT transmits an IKE_SA_INIT request including "ENCR_3DES",
      "PRF_HMAC_SHA1", "AUTH_HMAC_SHA1_96" and "D-H group 2" as proposed
      algorithms.
  
    Step 12: Judgment #5
      The NUT transmits IKE_AUTH request with a Notify payload of type INITIAL_CONTACT
      to the NUT. And the IKE_AUTH request includes "ENCR_3DES",
      "AUTH_HMAC_SHA1_96" and "No Extended Sequence Numbers" as proposed algorithms.
  
    Step 15: Judgment #6
      The NUT never transmits an Echo Reply.
  
    Step 17: Judgment #7
      The NUT transmits an Echo Reply with IPsec ESP using the second negotiated algorithm.

Possible Problems

  * None.