Test IKEv2.EN.R.1.1.7.3: Narrowing Traffic Selectors from multiple Traffic Selector Part A (BASIC)
To verify an IKEv2 device allows the responder to choose a subset of the traffic proposed by the initiator.
* [RFC 4306] - Sections 2.8 * [RFC 4718] - Sections 4.10
* Network Topology Connect the devices according to the Common Topology. * Configuration In each part, configure the devices according to the Common Configuration except Traffic Selector. Traffic Selector should be configured as following.
Traffic Selector Source Destination Address Range Next Layer Protocol Port Range Address Range Next Layer Protocol Port Range Inbound TN1 TCP ANY NUT TCP ANY Outbound NUT TCP ANY TN1 TCP ANY
* 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) | | (Packet #1) |------------------->| IKE_SA_INIT response (HDR, SAr1, KEr, Nr) | | (Judgement #1) | | |<-------------------| IKE_AUTH request (HDR, SK {IDi, AUTH, N, SAi2, TSi, TSr}) | | (Packet #2) |------------------->| IKE_AUTH response (HDR, SK {IDr, AUTH, N, SAr2, TSi, TSr}) | | (Judgement #2) | | |<-------------------| IPsec {TCP SYN} | | (Packet #3) |------------------->| IPsec {TCP RST} | | (Judgement #3) | | |<-------------------| IPsec {ICMPv6 Echo Request} | | (Packet #4) |---------X | IPsec {ICMPv6 Echo Reply} | | (Judgement #4) | | V V
N: USE_TRANSPORT_MODE
Packet #1 See Common Packet #1 Packet #2 See below Packet #3 See below Packet #4 See Common Packet #19
Packet #2: IKE_AUTH request
IPv6 Header Same as Common Packet #3 UDP Header Same as Common Packet #3 IKEv2 Header Same as Common Packet #3 E Payload Same as Common Packet #3 AUTH Header Same as Common Packet #3 N Header Same as Common Packet #3 SA Header Same as Common Packet #3 TSi Payload Other fields are same as the Common Packet #3 Traffic Selectors See below TSr Payload Other fields are same as the Common Packet #3 Traffic Selectors See below
TSi Payload Traffic Selector TS Type 8 (IPV6_ADDR_RANGE) IP Protocol ID 6 (TCP) Selector Length 40 Start Port 0 End Port 65535 Starting Address TN1's Global Address on Link X Ending Address TN1's Global Address on Link X Traffic Selector TS Type 8 (IPV6_ADDR_RANGE) IP Protocol ID 58 (IPV6-ICMP) Selector Length 40 Start Port 0 End Port 65535 Starting Address TN1's Global Address on Link X Ending Address TN1's Global Address on Link X
TSi Payload Traffic Selector TS Type 8 (IPV6_ADDR_RANGE) IP Protocol ID 6 (TCP) Selector Length 40 Start Port 0 End Port 65535 Starting Address NUT's Global Address on Link A Ending Address NUT's Global Address on Link A Traffic Selector TS Type 8 (IPV6_ADDR_RANGE) IP Protocol ID 58 (IPV6-ICMP) Selector Length 40 Start Port 0 End Port 65535 Starting Address NUT's Global Address on Link A Ending Address NUT's Global Address on Link A
Packet #3: TCP SYN packet
IPv6 Header Source Address TN1's Global Address on Link X Destination Address NUT's Global Address on Link A ESP Security Parameter Index CHILD_SA's SPI value used by this message Sequence Number The value incremented the previous encrypted packet's Sequence Number by one. Payload Data Subsequent data encrypted by underlying encryption algorithm Padding Any value which to be a multiple of the encryption block size Pad Length The length of the Padding field Next Header 6 (TCP) Integrity Check Value The checksum must be valid by calculation according to the manner described in RFC. TCP Header Source Port 500 Destination Port 500 Flags SYN (0x02)
Part A (BASIC) 1. TN1 sends an IKE_SA_INIT request. 2. Observe the messages transmitted on Link A. 3. TN1 sends an IKE_AUTH request to the NUT. The message includes two Traffice Selectors. One is set to 6 (TCP) as IP Protocol. Another is set to 58 (IPV6-ICMP). 4. Observe the messages transmitted on Link A. 5. TN1 transmits a TCP-SYN packet with IPsec ESP using corresponding algorithms to closed port on NUT. 6. Observe the messages transmitted on Link A. 7. TN1 transmits an Echo Request with IPsec ESP using corresponding algorithms to NUT. 8. Observe the messages transmitted on Link A.
Part A Step 2: Judgment #1 The NUT transmits an IKE_SA_INIT response 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 response including "ENCR_3DES", "AUTH_HMAC_SHA1_96" and "No Extended Sequence Numbers" as proposed algorithms. The Traffic Selector Payload has one Traffic Selector with IP Protocol 6 (TCP) to narrow the proposed Traffic Selectors.
Step 6: Judgment #3 The NUT transmits a TCP-RST packet with IPsec ESP using corresponding algorithms.
Step 8: Judgment #4 The NUT never transmits an Echo Reply with IPsec ESP using corresponding algorithms. Possible Problems:
* None.