Test IKEv2.EN.I.1.2.2.2: Stop of retransmission of CREATE_CHILD_SA requests
Part A: (BASIC)
To verify an IKEv2 device stops retransmission when it receives the corresponding response.
* [RFC 4306] - Sections 2.1, 2.2 and 2.4
* Network Topology
Connect the devices according to the Common Topology.
* Configuration
In each part, configure the devices according to the Common Configuration.
In addition, set IKE_SA Lifetime to 300 seconds and set CHILD_SA Lifetime to 30
seconds.
* Pre-Sequence and Cleanup Sequence
IKEv2 on the NUT is disabled after each part.
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} | repeat Echo exchange until lifetime of SA is expired
| | (Judgement #3) |
| | ---
--- ---
| |
|------------------->| CREATE_CHILD_SA request (HDR, SK {N, N+, SA, Ni, KEi, TSi, TSr})
| | (Judgement #4)
| |
| * wait for the event of a timeout
| |
|------------------->| CREATE_CHILD_SA request (HDR, SK {N, N+, SA, Ni, KEi, TSi, TSr})
| | (Judgement #5)
|<-------------------| CREATE_CHILD_SA response(HDR, SK {N+, SA, Nr, KEi, TSi, TSr})
| | (Packet #4)
| |
|--------X | never send CREATE_SA request (HDR, SK {N, N+, SA, Ni, KEi, TSi, TSr})
| | (Judgement #6)
| |
V V
N: REKEY_SA
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 #14 |
Part A: (BASIC)
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. Repeat Steps 6 and 7 until lifetime of SA is expired.
9. Observe the messages transmitted on Link A.
10. TN1 waits for the event of a timeout on NUT.
11. Observe the messages transmitted on Link A.
12. TN1 responds with a CREATE_CHILD_SA response to the NUT.
13. TN1 waits for the event of a timeout on NUT.
14. Observe the messages transmitted on Link A.
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 9: Judgment #4
The NUT transmits a CREATE_CHILD_SA request including "ENCR_3DES",
"AUTH_HMAC_SHA1_96" and "No Extended Sequence Numbers" as proposed algorithms.
Step 11: Judgment #5
The NUT retransmits a CREATE_CHILD_SA request which has the same Message ID value
as the previous CREATE_CHILD_SA request's Message ID value in IKE Header.
Step 14: Judgment #6
The NUT stops the retransmissions of a CREATE_CHILD_SA request which has the same
Message ID value as the previous CREATE_CHILD_SA request's Message ID value in IKE
Header.
* Each NUT has the different lifetime of SA.
* Each NUT has the different retransmission timers.