PSK가 있는 사이트 간 VPN에 ASA IKEv2 디버깅 사용

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업데이트:2024년 4월 4일
문서 ID:115935

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이 번역에 관하여

Cisco는 전 세계 사용자에게 다양한 언어로 지원 콘텐츠를 제공하기 위해 기계 번역 기술과 수작업 번역을 병행하여 이 문서를 번역했습니다. 아무리 품질이 높은 기계 번역이라도 전문 번역가의 번역 결과물만큼 정확하지는 않습니다. Cisco Systems, Inc.는 이 같은 번역에 대해 어떠한 책임도 지지 않으며 항상 원본 영문 문서(링크 제공됨)를 참조할 것을 권장합니다.

    소개

    이 문서에서는 Cisco ASA(Adaptive Security Appliance)의 IKEv2(Internet Key Exchange Version 2) 디버깅에 대한 정보를 설명합니다.

    사전 요구 사항

    요구 사항

    이 문서에 대한 특정 요건이 없습니다.

    사용되는 구성 요소

    이 문서는 특정 소프트웨어 및 하드웨어 버전으로 한정되지 않습니다.

    이 문서의 정보는 특정 랩 환경의 디바이스를 토대로 작성되었습니다. 이 문서에 사용된 모든 디바이스는 초기화된(기본) 컨피그레이션으로 시작되었습니다. 현재 네트워크가 작동 중인 경우 모든 명령의 잠재적인 영향을 미리 숙지하시기 바랍니다.

    핵심 문제

    IKEv2에서 사용되는 패킷 교환 프로세스는 IKEv1에서 사용되는 것과 근본적으로 다릅니다. IKEv1에서는 6개의 패킷으로 구성된 Phase1 교환이 명확하게 구분되어 있고 3개의 패킷으로 구성된 Phase2 교환이 있습니다. IKEv2 교환은 가변적입니다.

    팁: 차이점과 패킷 교환 프로세스에 대한 자세한 내용은 IKEv2 패킷 교환 및 프로토콜 수준 디버깅을 참조하십시오.

    사용되는 디버그

    다음 두 디버그는 IKEv2에 사용됩니다.

    debug crypto ikev2 protocol 127
    debug crypto ikev2 platform 127

    ASA 컨피그레이션

    이 섹션에서는 ASA1(initiator) 및 ASA2(responder)에 대한 컨피그레이션의 예를 제공합니다.

    ASA1

    interface GigabitEthernet0/0
    nameif outside
    security-level 0
    ip address 10.0.0.1 255.255.255.0

    interface GigabitEthernet0/2
    nameif inside 
    security-level 100 
    ip address 192.168.1.2 255.255.255.0 

    crypto ipsec ikev2 ipsec-proposal AES256
    protocol esp encryption aes-256
    protocol esp integrity sha-1 md5

    access-list l2l_list extended permit ip host 192.168.1.1 
       host  192.168.2.99
    access-list l2l_list extended permit ip host 192.168.1.12 
       host 192.168.2.99 

    crypto map outside_map 1 match address l2l_list
    crypto map outside_map 1 set peer 10.0.0.2
    crypto map outside_map 1 set ikev2 ipsec-proposal AES256
    crypto map outside_map interface outside

    crypto ikev2 policy 1
    encryption aes-256
    integrity sha
    group 2
    prf sha
    lifetime seconds 86400

    crypto ikev2 enable outside

    tunnel-group 10.0.0.2 type ipsec-l2l
    tunnel-group 10.0.0.2 ipsec-attributes
    ikev2 remote-authentication pre-shared-key *****
    ikev2 local-authentication pre-shared-key *****

    ASA2

    interface GigabitEthernet0/1 
    nameif outside 
    security-level 0 
    ip address 10.0.0.2 255.255.255.0

    interface GigabitEthernet0/2
    nameif inside
    security-level 100
    ip address 192.168.2.1 255.255.255.0

    crypto ipsec ikev2 ipsec-proposal AES256 
    protocol esp encryption aes-256 
    protocol esp integrity sha-1 md5

    access-list l2l_list extended permit ip host 192.168.2.99 
       host 192.168.1.1 
    access-list l2l_list extended permit ip host 192.168.2.99 
       host 192.168.1.12

    crypto map outside_map 1 match address l2l_list
    crypto map outside_map 1 set peer 10.0.0.1 
    crypto map outside_map 1 set ikev2 ipsec-proposal AES256 
    crypto map outside_map interface outside 

    crypto ikev2 policy 1
    encryption aes-256
    integrity sha
    group 2
    prf sha
    lifetime seconds 86400 

    crypto ikev2 enable outside 
    tunnel-group 10.0.0.1 type ipsec-l2l 
    tunnel-group 10.0.0.1 ipsec-attributes
    ikev2 remote-authentication pre-shared-key *****
    ikev2 local-authentication pre-shared-key *****

    디버그

    이 섹션에서는 ASA1(initiator) 및 ASA2(responder) 터널 협상, 하위 SA(Security Association) 디버그 및 메시지 설명에 대해 설명합니다.

    터널 협상

    ASA1은 피어 ASA 10.0.0.2에 대한 암호화 ACL(Access Control List)과 일치하는 패킷을 수신하고 SA 생성을 시작합니다.

    IKEv2-PLAT-3: attempting to find tunnel 
         group for IP: 10.0.0.2
      IKEv2-PLAT-3: mapped to tunnel group 10.0.0.2 
         using peer IP
      IKEv2-PLAT-3: my_auth_method = 2
      IKEv2-PLAT-3: supported_peers_auth_method = 2
      IKEv2-PLAT-3: P1 ID = 0
      IKEv2-PLAT-3: Translating IKE_ID_AUTO to = 255
      IKEv2-PLAT-3: (16) tp_name set to:
      IKEv2-PLAT-3: (16) tg_name set to: 10.0.0.2
      IKEv2-PLAT-3: (16) tunn grp type set to: L2L
      IKEv2-PLAT-5: New ikev2 sa request admitted
      IKEv2-PLAT-5: Incrementing outgoing negotiating 
       sa count by one

    전송되는 메시지의 초기 쌍은 IKE_SA_INIT 교환용입니다. 이러한 메시지는 암호화 알고리즘을 협상하고 논스를 교환하며 DH(Diffie-Hellman) 교환을 수행합니다.

    ASA1과 관련된 컨피그레이션은 다음과 같습니다.

    crypto ikev2 policy 1
      encryption aes-256
      integrity sha
      group 2
      prf sha
      lifetime seconds 86400
    crypto ikev2 enable outside
      
    Tunnel Group matching the identity name is present:
      
    tunnel-group 10.0.0.2 type ipsec-l2l
    tunnel-group 10.0.0.2 ipsec-attributes
      ikev2 remote-authentication pre-shared-key *****
      ikev2 local-authentication pre-shared-key *****

    이 Exchange에 대한 디버그 출력은 다음과 같습니다.

    IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=0000000000000000 (I) 
         MsgID = 00000000 CurState: IDLE Event: EV_INIT_SA
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=0000000000000000 (I) 
         MsgID = 00000000 CurState: I_BLD_INIT 
         Event: EV_GET_IKE_POLICY
      IKEv2-PROTO-3: (16): Getting configured policies
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=0000000000000000 
         (I) MsgID = 00000000 CurState: I_BLD_INIT 
         Event: EV_SET_POLICY
      IKEv2-PROTO-3: (16): Setting configured policies
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=0000000000000000 (I) 
         MsgID = 00000000 CurState: I_BLD_INIT 
         Event: EV_CHK_AUTH4PKI 
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=0000000000000000 (I) 
         MsgID = 00000000 CurState: I_BLD_INIT 
         Event: EV_GEN_DH_KEY
      IKEv2-PROTO-3: (16): Computing DH public key
      IKEv2-PROTO-3: (16):
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=0000000000000000 (I) 
         MsgID = 00000000 CurState: I_BLD_INIT 
         Event: EV_NO_EVENT
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=0000000000000000 (I) 
         MsgID = 00000000 CurState: I_BLD_INIT 
         Event: EV_OK_RECD_DH_PUBKEY_RESP
      IKEv2-PROTO-5: (16): Action: Action_Null
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=0000000000000000 (I) 
         MsgID = 00000000 CurState: I_BLD_INIT 
         Event: EV_GET_CONFIG_MODE
    IKEv2-PROTO-5: (16): SM Trace-> SA: I_SPI=DFA3B583A4369958

    그런 다음 ASA1은 다음을 포함하는 IKE_INIT_SA 패킷을 작성합니다.

    • ISAKMP 헤더(SPI/버전/플래그)

    • SAi1(IKE 개시자가 지원하는 암호화 알고리즘)

    • KEi(개시자의 DH 공개 키 값)

    • N(초기자 Nonce)
    R_SPI=0000000000000000 (I) MsgID = 00000000 
         CurState: I_BLD_INIT Event: EV_BLD_MSG 
      IKEv2-PROTO-2: (16): Sending initial message
      IKEv2-PROTO-3: Tx [L 10.0.0.1:500/R 10.0.0.2:500/VRF i0:f0] 
         m_id: 0x0
      IKEv2-PROTO-3: HDR[i:DFA3B583A4369958 - 
         r: 0000000000000000]
      IKEv2-PROTO-4: IKEV2 HDR ispi: DFA3B583A4369958 - 
         rspi: 0000000000000000
      IKEv2-PROTO-4: Next payload: SA, version: 2.0
      IKEv2-PROTO-4: Exchange type: IKE_SA_INIT, 
         flags: INITIATOR
      IKEv2-PROTO-4: Message id: 0x0, length: 338
      SA  Next payload: KE, reserved: 0x0, 
         length: 48
      IKEv2-PROTO-4: last proposal: 0x0, reserved: 0x0, 
         length: 44  Proposal: 1, Protocol id: IKE, 
         SPI size: 0, #trans: 4 
      IKEv2-PROTO-4:     last transform: 0x3, reserved: 0x0: 
         length: 12 type: 1, reserved: 0x0, id: AES-CBC
      IKEv2-PROTO-4:     last transform: 0x3, reserved: 0x0: 
         length: 8 type: 2, reserved: 0x0, id: SHA1
      IKEv2-PROTO-4:     last transform: 0x3, reserved: 0x0: 
         length: 8 type: 3, reserved: 0x0, id: SHA96
      IKEv2-PROTO-4:     last transform: 0x0, reserved: 0x0: 
         length: 8 type: 4, reserved: 0x0, 
         id: DH_GROUP_1024_MODP/Group 2
      KE  Next payload: N, reserved: 0x0, 
         length: 136
          DH group: 2, Reserved: 0x0
            19 65 43 45 d2 72 a7 11 b8 a4 93 3f 44 95 6c b8
           6d 5a f0 f8 1f f3 d4 b9 ff 41 7b 0d 13 90 82 cf
           34 2e 74 e3 03 6e 9e 00 88 80 5d 86 2c 4c 79 35
           ee e6 98 91 89 f3 48 83 75 09 02 f1 3c b1 7f f5
           be 05 f1 fa 7e 8a 4c 43 eb a9 2c 3a 47 c0 68 40
           f5 dd 02 9d a5 b5 a2 a6 90 64 95 fc 57 b5 69 e8
           b2 4f 8e f2 a5 05 e3 c7 17 f9 c0 e0 c8 3e 91 ed
           c1 09 23 3e e5 09 4f be 1a 6a d4 d9 fb 65 44 1d
      N  Next payload: VID, reserved: 0x0, 
         length: 24
           84 8b 80 c2 52 6c 4f c7 f8 08 b8 ed! 52 af a2 f4
           d5 dd d4 f4
      VID  Next payload: VID, reserved: 0x0, 
         length: 23
      
           43 49 53 43 4f 2d 44 45 4c 45 54 45 2d 52 45 41
           53 4f 4e
      VID  Next payload: VID, reserved: 0x0, length: 59
      
           43 49 53 43 4f 28 43 4f 50 59 52 49 47 48 54 29
           26 43 6f 70 79 72 69 67 68 74 20 28 63 29 20 32
           30 30 39 20 43 69 73 63 6f 20 53 79 73 74 65 6d
           73 2c 20 49 6e 63 2e
    VID  Next payload: NONE, reserved: 0x0, length: 20
         40 48 b7 6e bc e8 85 25 e7 de 7f 00 d6 c2 d3

    그런 다음 ASA1에서 IKE_INIT_SA 패킷을 전송합니다.

    IKEv2-PLAT-4: SENT PKT [IKE_SA_INIT]
         [10.0.0.1]:500->[10.0.0.2]:500

    ASA2는 IKEV_INIT_SA 패킷을 수신합니다.

    IKEv2-PLAT-4: RECV PKT [IKE_SA_INIT]
          [10.0.0.1]:500->[10.0.0.2]:500
          InitSPI=0xdfa3b583a4369958 RespSPI=0x0000000000000000
        MID=00000000

    ASA2는 해당 피어에 대한 SA 생성을 시작합니다.

    IKEv2-PROTO-3: Rx [L 10.0.0.2:500/R 
         10.0.0.1:500/VRF i0:f0] m_id: 0x0
      IKEv2-PROTO-3: HDR[i:DFA3B583A4369958 - 
         r: 0000000000000000]
      IKEv2-PROTO-4: IKEV2 HDR ispi: DFA3B583A4369958 - 
         rspi: 0000000000000000
      IKEv2-PROTO-4: Next payload: SA, version: 2.0
      IKEv2-PROTO-4: Exchange type: IKE_SA_INIT, 
         flags: INITIATOR
      IKEv2-PROTO-4: Message id: 0x0, length: 338
      IKEv2-PLAT-5: New ikev2 sa request admitted
      IKEv2-PLAT-5: Incrementing incoming negotiating 
         sa count by one
      SA  Next payload: KE, reserved: 0x0, length: 48
      IKEv2-PROTO-4:   last proposal: 0x0, reserved: 0x0, 
         length: 44 Proposal: 1, Protocol id: IKE, SPI size: 0, 
         #trans: 4
      IKEv2-PROTO-4:     last transform: 0x3, reserved: 0x0: 
         length: 12 type: 1, reserved: 0x0, id: AES-CBC
      IKEv2-PROTO-4:     last transform: 0x3, reserved: 0x0: 
         length: 8 type: 2, reserved: 0x0, id: SHA1
      IKEv2-PROTO-4:     last transform: 0x3, reserved: 0x0: 
         length: 8 type: 3, reserved: 0x0, id: SHA96
      IKEv2-PROTO-4:     last transform: 0x0, reserved: 0x0: 
         length: 8 type: 4, reserved: 0x0, 
         id: DH_GROUP_1024_MODP/Group 2
      KE  Next payload: N, reserved: 0x0, length: 136
          DH group: 2, Reserved: 0x0
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=27C943C13FD94665 (R) 
         MsgID = 00000000 CurState: IDLE 
         Event: EV_RECV_INIT
      IKEv2-PROTO-5: (16): SM Trace-> 
       SA: I_SPI=DFA3B583A4369958 R_SPI=27C943C13FD94665 (R)

    ASA2는 IKE_INIT 메시지를 확인하고 처리합니다.

    1. ASA1에서 제공하는 암호화 제품군을 선택합니다.

    2. 자체 DH 비밀 키를 계산합니다.

    3. 또한 이 IKE_SA에 대해 모든 키가 파생될 수 있는 SKEYID 값을 계산합니다. 다음에 오는 모든 메시지의 헤더를 제외한 모든 헤더가 암호화되고 인증됩니다. 암호화 및 무결성 보호에 사용되는 키는 SKEYID에서 파생되며 다음과 같습니다.

      • SK_e는 암호화에 사용됩니다.

      • SK_a는 인증에 사용됩니다.

      • SK_d가 파생되어 CHILD_SAs에 대한 추가 키 재료 파생에 사용됩니다. 각 방향에 대해 별도의 SK_e와 SK_a가 산출된다.

    ASA2와 관련된 컨피그레이션은 다음과 같습니다.

    crypto ikev2 policy 1
      encryption aes-256
      integrity sha
      group 2
      prf sha
      lifetime seconds 86400
    crypto ikev2 enable outside
      
    Tunnel Group matching the identity name is present:
      
    tunnel-group 10.0.0.1 type ipsec-l2l
    tunnel-group 10.0.0.1 ipsec-attributes
      ikev2 remote-authentication pre-shared-key *****
      ikev2 local-authentication pre-shared-key *****

    디버그 출력은 다음과 같습니다.

    MsgID = 00000000 CurState: R_INIT Event: EV_VERIFY_MSG
      IKEv2-PROTO-3: (16): Verify SA init message
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=27C943C13FD94665 (R) 
         MsgID = 00000000 CurState: R_INIT Event: EV_INSERT_SA
      IKEv2-PROTO-3: (16): Insert SA
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=27C943C13FD94665 (R) 
         MsgID = 00000000 CurState: R_INIT 
         Event: EV_GET_IKE_POLICY
      IKEv2-PROTO-3: (16): Getting configured policies
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=27C943C13FD94665 (R) 
         MsgID = 00000000 CurState: R_INIT Event:EV_PROC_MSG
      IKEv2-PROTO-2: (16): Processing initial message
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=27C943C13FD94665 (R) 
         MsgID = 00000000 CurState: R_INIT 
         Event: EV_DETECT_NAT
      IKEv2-PROTO-3: (16): Process NAT discovery notify
      IKEv2-PROTO-5: (16): No NAT found
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=27C943C13FD94665 (R) 
         MsgID = 00000000 CurState: R_INIT 
         Event: EV_CHK_CONFIG_MODE
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=27C943C13FD94665 (R) 
         MsgID = 00000000 CurState: R_BLD_INIT 
         Event: EV_SET_POLICY
      IKEv2-PROTO-3: (16): Setting configured policies
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=27C943C13FD94665 (R) 
         MsgID = 00000000 CurState: R_BLD_INIT 
         Event: EV_CHK_AUTH4PKI
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=27C943C13FD94665 (R) 
         MsgID = 00000000 CurState: R_BLD_INIT  
         Event: EV_PKI_SESH_OPEN
      IKEv2-PROTO-3: (16): Opening a PKI session
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=27C943C13FD94665 (R) 
         MsgID = 00000000 CurState: R_BLD_INIT 
         Event: EV_GEN_DH_KEY
      IKEv2-PROTO-3: (16): Computing DH public key
      IKEv2-PROTO-3: (16):
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=27C943C13FD94665 (R) 
         MsgID = 00000000 CurState: R_BLD_INIT 
         Event: EV_NO_EVENT
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=27C943C13FD94665 (R) 
         MsgID = 00000000 CurState: R_BLD_INIT 
         Event: EV_OK_RECD_DH_PUBKEY_RESP
      IKEv2-PROTO-5: (16): Action: Action_Null
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=27C943C13FD94665 (R) 
         MsgID = 00000000 CurState: R_BLD_INIT 
         Event: EV_GEN_DH_SECRET
      IKEv2-PROTO-3: (16): Computing DH secret key
      IKEv2-PROTO-3: (16):
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=27C943C13FD94665 (R) 
         MsgID = 00000000 CurState: R_BLD_INIT 
         Event: EV_NO_EVENT
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=27C943C13FD94665 (R) 
         MsgID = 00000000 CurState: R_BLD_INIT 
         Event: EV_OK_RECD_DH_SECRET_RESP
      IKEv2-PROTO-5: (16): Action: Action_Null
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958_SPI=27C943C13FD94665 (R) 
         MsgID = 00000000 CurState: R_BLD_INIT 
         Event: EV_GEN_SKEYID
      IKEv2-PROTO-3: (16): Generate skeyid
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=27C943C13FD94665 (R) 
         MsgID = 00000000 CurState: R_BLD_INIT 
         Event: EV_GET_CONFIG_MODE
      IKEv2-PROTO-5: (16): SM Trace-> SA: I_SPI=DFA3B583A4369958 
         R_SPI=27C943C13FD94665 (R) MsgID = 00000000 
       CurState: R_BLD_INIT Event: EV_BLD_MSG

    그런 다음 ASA2는 ASA1에서 수신하는 IKE_SA_INIT 교환에 대한 responder 메시지를 작성합니다. 이 패킷에는 다음이 포함됩니다.

    • ISAKMP 헤더(SPI/버전/플래그)

    • SAr1(IKE 응답자가 선택하는 암호화 알고리즘)

    • KEr(responder의 DH 공개 키 값)

    • 응답자 논스

    디버그 출력은 다음과 같습니다.

    IKEv2-PROTO-2: (16): Sending initial message
      IKEv2-PROTO-3:   IKE Proposal: 1, SPI size: 0 
         (initial negotiation),
      Num. transforms: 4
      AES-CBC SHA1 SHA96 DH_GROUP_1024_MODP/Group 2
      
      IKEv2-PROTO-5: Construct Vendor Specific Payload: 
         FRAGMENTATIONIKEv2-PROTO-3: 
         Tx [L 10.0.0.2:500/R 10.0.0.1:500/VRF i0:f0] m_id: 0x0
      IKEv2-PROTO-3: HDR[i:DFA3B583A4369958 - r: 27C943C13FD94665]
      IKEv2-PROTO-4: IKEV2 HDR ispi: DFA3B583A4369958 - 
         rspi: 27C943C13FD94665
      IKEv2-PROTO-4: Next payload: SA, version: 2.0
      IKEv2-PROTO-4: Exchange type: IKE_SA_INIT, 
         flags: RESPONDER MSG-RESPONSE
      IKEv2-PROTO-4: Message id: 0x0, length: 338
      SA  Next payload: KE, reserved: 0x0, length: 48
      IKEv2-PROTO-4:   last proposal: 0x0, reserved: 0x0, 
         length: 44 Proposal: 1, Protocol id: IKE, SPI size: 0, 
         #trans: 4
      IKEv2-PROTO-4:     last transform: 0x3, reserved: 0x0: 
         length: 12 type: 1, reserved: 0x0, id: AES-CBC
      IKEv2-PROTO-4:     last transform: 0x3, reserved: 0x0: 
         length: 8 type: 2, reserved: 0x0, id: SHA1
      IKEv2-PROTO-4:     last transform: 0x3, reserved: 0x0: 
         length: 8 type: 3, reserved: 0x0, id: SHA96
      IKEv2-PROTO-4:     last transform: 0x0, reserved: 0x0: 
         length: 8 type: 4, reserved: 0x0, 
         id: DH_GROUP_1024_MODP/Group 2
      
      KE  Next payload: N, reserved: 0x0, length: 136
      
    DH group: 2, Reserved: 0x0

    ASA2는 responder 메시지를 ASA1에 전송합니다.

    IKEv2-PLAT-4: SENT PKT [IKE_SA_INIT] 
         [10.0.0.2]:500->[10.0.0.1]:500 InitSPI=0xdfa3b583a4369958 
       RespSPI=0x27c943c13fd94665 MID=00000000

    ASA1은 ASA2로부터 IKE_SA_INIT 응답 패킷을 수신합니다.

    IKEv2-PLAT-4: RECV PKT 
         [IKE_SA_INIT] 
         [10.0.0.2]:500->
         [10.0.0.1]:500 
         InitSPI=0xdfa3b583a4369958 
         RespSPI=0x27c943c13fd94665 
       MID=00000000

    ASA2가 권한 부여 프로세스에 대한 타이머를 시작합니다.

    IKEv2-PROTO-5: (16): 
         SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 
         R_SPI=27C943C13FD94665 (R) 
         MsgID = 00000000 
         CurState: INIT_DONE 
         Event: EV_DONE
      IKEv2-PROTO-3: (16): 
         Fragmentation is
         enabled
      IKEv2-PROTO-3: (16): Cisco 
         DeleteReason Notify 
         is enabled
      IKEv2-PROTO-3: (16): Complete 
         SA init exchange
      IKEv2-PROTO-5: (16): 
         SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 
         R_SPI=27C943C13FD94665 (R) 
         MsgID = 00000000 
         CurState: INIT_DONE 
         Event: EV_CHK4_ROLE
      IKEv2-PROTO-5: (16): 
         SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 
         R_SPI=27C943C13FD94665 (R) 
         MsgID = 00000000
      
      CurState: INIT_DONE Event: 
         EV_START_TMR
      IKEv2-PROTO-3: (16): Starting 
         timer to wait for auth 
         message (30 sec)
      IKEv2-PROTO-5: (16): 
         SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 
         R_SPI=27C943C13FD94665 (R) 
         MsgID = 00000000 
         CurState: R_WAIT_AUTH 
       Event: EV_NO_EVENT

    ASA1은 응답을 확인하고 처리합니다.

    1. 개시자 DH 비밀 키가 계산됩니다.

    2. 개시자 SKEYID가 생성됩니다.

    디버그 출력은 다음과 같습니다.

    IKEv2-PROTO-3: Rx [L 10.0.0.1:500/R 10.0.0.2:500/VRF i0:f0] 
         m_id: 0x0
      IKEv2-PROTO-3: HDR[i:DFA3B583A4369958 - r: 27C943C13FD94665]
      IKEv2-PROTO-4: IKEV2 HDR ispi: DFA3B583A4369958 - 
         rspi: 27C943C13FD94665
      IKEv2-PROTO-4: Next payload: SA, version: 2.0
      IKEv2-PROTO-4: Exchange type: IKE_SA_INIT, 
         flags: RESPONDER MSG-RESPONSE
      IKEv2-PROTO-4: Message id: 0x0, length: 338
      
      SA  Next payload: KE, reserved: 0x0, length: 48
      IKEv2-PROTO-4:   last proposal: 0x0, reserved: 0x0, 
         length: 44 Proposal: 1, Protocol id: IKE, SPI size: 0, 
         #trans: 4
      IKEv2-PROTO-4:     last transform: 0x3, reserved: 0x0: 
         length: 12 type: 1, reserved: 0x0, id: AES-CBC
      IKEv2-PROTO-4:     last transform: 0x3, reserved: 0x0: 
         length: 8 type: 2, reserved: 0x0, id: SHA1
      IKEv2-PROTO-4:     last transform: 0x3, reserved: 0x0: 
         length: 8 type: 3, reserved: 0x0, id: SHA96
      IKEv2-PROTO-4:     last transform: 0x0, reserved: 0x0: 
         length: 8 type: 4, reserved: 0x0, 
         id: DH_GROUP_1024_MODP/Group 2
      KE  Next payload: N, reserved: 0x0, length: 136
          DH group: 2, Reserved: 0x0
      
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=27C943C13FD94665 (I) 
         MsgID = 00000000 CurState: I_WAIT_INIT 
         Event: EV_RECV_INIT
      IKEv2-PROTO-5: (16): Processing initial message
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=27C943C13FD94665 (I) 
         MsgID = 00000000 CurState: I_PROC_INIT 
         Event: EV_CHK4_NOTIFY
      IKEv2-PROTO-2: (16): Processing initial message
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=27C943C13FD94665 (I) 
         MsgID = 00000000 CurState: I_PROC_INIT 
         Event: EV_VERIFY_MSG
      IKEv2-PROTO-3: (16): Verify SA init message
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=27C943C13FD94665 (I) 
         MsgID = 00000000 CurState: I_PROC_INIT 
         Event: EV_PROC_MSG
      IKEv2-PROTO-2: (16): Processing initial message
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=27C943C13FD94665 (I) 
         MsgID = 00000000 CurState: I_PROC_INIT 
         Event: EV_DETECT_NAT
      IKEv2-PROTO-3: (16): Process NAT discovery notify
      IKEv2-PROTO-3: (16): NAT-T is disabled
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=27C943C13FD94665 (I) 
         MsgID = 00000000 CurState: I_PROC_INIT 
         Event: EV_CHK_NAT_T
      IKEv2-PROTO-3: (16): Check NAT discovery
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=27C943C13FD94665 (I) 
         MsgID = 00000000 CurState: I_PROC_INIT 
         Event: EV_CHK_CONFIG_MODE
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 
         R_SPI=27C943C13FD94665 (I) MsgID = 00000000 
         CurState: INIT_DONE Event: EV_GEN_DH_SECRET
      IKEv2-PROTO-3: (16): Computing DH secret key
      IKEv2-PROTO-3: (16):
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 
         R_SPI=27C943C13FD94665 (I) MsgID = 00000000 
         CurState: INIT_DONE Event: EV_NO_EVENT
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 
         R_SPI=27C943C13FD94665 (I) MsgID = 00000000 
         CurState: INIT_DONE Event: EV_OK_RECD_DH_SECRET_RESP
      IKEv2-PROTO-5: (16): Action: Action_Null
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 
         R_SPI=27C943C13FD94665 (I) MsgID = 00000000 
         CurState: INIT_DONE Event: EV_GEN_SKEYID
      IKEv2-PROTO-3: (16): Generate skeyid
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=27C943C13FD94665 (I) 
         MsgID = 00000000 CurState: INIT_DONE Event: EV_DONE
      IKEv2-PROTO-3: (16): Fragmentation is enabled
    IKEv2-PROTO-3: (16): Cisco DeleteReason Notify is enabled

    ASA 간의 IKE_INIT_SA 교환이 완료되었습니다.

    IKEv2-PROTO-3: (16): Complete SA init exchange

    ASA1은 IKE_AUTH 교환을 시작하고 인증 페이로드를 생성하기 시작합니다. IKE_AUTH 패킷에는 다음이 포함됩니다.

    • ISAKMP 헤더(SPI/버전/플래그)

    • IDi(개시자 ID)

    • 인증 페이로드

    • SAi2(IKEv1의 2단계 변환 세트 교환과 유사한 SA를 시작)

    • TSi 및 TSr(initiator 및 responder 트래픽 선택기)

    참고: TSi 및 TSr에는 각각 암호화된 트래픽을 전달/수신하기 위한 initiator 및 responder의 소스 및 목적지 주소가 포함되어 있습니다. 주소 범위는 해당 범위를 오가는 모든 트래픽이 터널링되도록 지정합니다. 제안이 응답자에게 허용 가능한 경우 동일한 TS 페이로드를 반환합니다.

    또한 첫 번째 CHILD_SA는 트리거 패킷과 일치하는 proxy_ID 쌍에 대해 생성됩니다.

    ASA1과 관련된 컨피그레이션은 다음과 같습니다.

    crypto ipsec 
         ikev2 
         ipsec-proposal 
         AES256
      protocol esp 
         encryption 
         aes-256
      protocol esp 
         integrity 
         sha-1 md5
      
      access-list 
         l2l_list 
         extended 
         permit ip 
         host 10.0.0.2 
       host 10.0.0.1

    디버그 출력은 다음과 같습니다.

    IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=27C943C13FD94665 (I) 
         MsgID = 00000000 CurState: I_BLD_AUTH Event: EV_GEN_AUTH
      IKEv2-PROTO-3: (16): Generate my authentication data
      IKEv2-PROTO-3: (16): Use preshared key for id 10.0.0.1, 
         key len 5
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=27C943C13FD94665 (I) 
         MsgID = 00000000 CurState: I_BLD_AUTH 
         Event: EV_CHK_AUTH_TYPE
      IKEv2-PROTO-3: (16): Get my authentication method
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=27C943C13FD94665 (I) 
         MsgID = 00000000 CurState: I_BLD_AUTH 
         Event: EV_OK_AUTH_GEN
      IKEv2-PROTO-3: (16): Check for EAP exchange
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=27C943C13FD94665 (I) 
         MsgID = 00000000 CurState: I_BLD_AUTH 
         Event: EV_SEND_AUTH
      IKEv2-PROTO-2: (16): Sending auth message
      IKEv2-PROTO-5: Construct Vendor Specific Payload: 
         CISCO-GRANITE
      IKEv2-PROTO-3:   ESP Proposal: 1, SPI size: 4 
         (IPSec negotiation),
      Num. transforms: 4
         AES-CBC   SHA96   MD596
      IKEv2-PROTO-5: Construct Notify Payload: INITIAL_CONTACT
      IKEv2-PROTO-5: Construct Notify Payload: ESP_TFC_NO_SUPPORT
      IKEv2-PROTO-5: Construct Notify Payload: NON_FIRST_FRAGS
      IKEv2-PROTO-3: (16): Building packet for encryption; 
         contents are:
      VID  Next payload: IDi, reserved: 0x0, length: 20
      
           dd a3 b4 83 b7 01 6a 1f 3d b7 84 1a 75 e6 83 a6
      IDi  Next payload: AUTH, reserved: 0x0, length: 12
          Id type: IPv4 address, Reserved: 0x0 0x0
      
           47 01 01 01
      AUTH  Next payload: SA, reserved: 0x0, length: 28
          Auth method PSK, reserved: 0x0, reserved 0x0
      Auth data: 20 bytes
      SA  Next payload: TSi, reserved: 0x0, length: 52
      IKEv2-PROTO-4:   last proposal: 0x0, reserved: 0x0, 
         length: 48 Proposal: 1, Protocol id: ESP, SPI size: 4, 
         #trans: 4
      IKEv2-PROTO-4:     last transform: 0x3, reserved: 0x0: 
         length: 12 type: 1, reserved: 0x0, id: AES-CBC
      IKEv2-PROTO-4:     last transform: 0x3, reserved: 0x0: 
         length: 8 type: 3, reserved: 0x0, id: SHA96
      IKEv2-PROTO-4:     last transform: 0x3, reserved: 0x0: 
         length: 8 type: 3, reserved: 0x0, id: MD596
      IKEv2-PROTO-4:     last transform: 0x0, reserved: 0x0: 
         length: 8 type: 5, reserved: 0x0, id:
      
        TSi  Next payload: TSr, reserved: 0x0, length: 24
          Num of TSs: 1, reserved 0x0, reserved 0x0
          TS type: TS_IPV4_ADDR_RANGE, proto id: 0, length: 16
          start port: 0, end port: 65535
          start addr: 192.168.1.1, end addr: 192.168.1.1
      TSr  Next payload: NOTIFY, reserved: 0x0, length: 24
          Num of TSs: 1, reserved 0x0, reserved 0x0
          TS type: TS_IPV4_ADDR_RANGE, proto id: 0, length: 16
          start port: 0, end port: 65535
          start addr: 192.168.2.99, end addr: 192.168.2.99
      IKEv2-PROTO-3: Tx [L 10.0.0.1:500/R 10.0.0.2:500/VRF i0:f0] 
         m_id: 0x1
      IKEv2-PROTO-3: HDR[i:DFA3B583A4369958 - r: 27C943C13FD94665]
      IKEv2-PROTO-4: IKEV2 HDR ispi: DFA3B583A4369958 - 
         rspi: 27C943C13FD94665
      
      IKEv2-PROTO-4: Next payload: ENCR, version: 2.0
      IKEv2-PROTO-4: Exchange type: IKE_AUTH, flags: INITIATOR
      IKEv2-PROTO-4: Message id: 0x1, length: 284
      ENCR  Next payload: VID, reserved: 0x0, length: 256
    Encrypted data: 252 bytes

    ASA1은 IKE_AUTH 패킷을 ASA2에 전송합니다.

    IKEv2-PLAT-4: SENT PKT [IKE_AUTH] 
         [10.0.0.1]:500->[10.0.0.2]:500 
         InitSPI=0xdfa3b583a4369958 RespSPI=0x27c943c13fd94665 
       MID=00000001

    ASA2는 ASA1에서 이 패킷을 수신합니다.

    IKEv2-PLAT-4: RECV PKT [IKE_AUTH] 
         [10.0.0.1]:500->[10.0.0.2]:500 
         InitSPI=0xdfa3b583a4369958 RespSPI=0x27c943c13fd94665 
       MID=00000001

    ASA2는 권한 부여 타이머를 중지하고 ASA1에서 받은 인증 데이터를 확인합니다. 그런 다음 ASA1과 정확히 같은 자체 인증 데이터를 생성합니다.

    ASA2와 관련된 컨피그레이션은 다음과 같습니다.

    crypto ipsec 
         ikev2 
         ipsec-
         proposal 
         AES256
      protocol esp 
         encryption 
         aes-256
      protocol esp 
         integrity 
       sha-1 md5

    디버그 출력은 다음과 같습니다.

    IKEv2-PROTO-3: Rx [L 10.0.0.2:500/R 10.0.0.1:500/VRF i0:f0] 
         m_id: 0x1
      IKEv2-PROTO-3: HDR[i:DFA3B583A4369958 - r: 27C943C13FD94665]
      IKEv2-PROTO-4: IKEV2 HDR ispi: DFA3B583A4369958 - 
         rspi: 27C943C13FD94665
      IKEv2-PROTO-4: Next payload: ENCR, version: 2.0
      IKEv2-PROTO-4: Exchange type: IKE_AUTH, flags: INITIATOR
      IKEv2-PROTO-4: Message id: 0x1, length: 284
      IKEv2-PROTO-5: (16): Request has mess_id 1; 
         expected 1 through 1 REAL Decrypted packet:
         Data: 216 bytes
      IKEv2-PROTO-5: Parse Vendor Specific Payload: (CUSTOM) VID  
         Next payload: IDi, reserved: 0x0, length: 20
      
           dd a3 b4 83 b7 01 6a 1f 3d b7 84 1a 75 e6 83 a6
      IDi  Next payload: AUTH, reserved: 0x0, length: 12
          Id type: IPv4 address, Reserved: 0x0 0x0
      
           47 01 01 01
      AUTH  Next payload: SA, reserved: 0x0, length: 28
          Auth method PSK, reserved: 0x0, reserved 0x0
      Auth data: 20 bytes
      SA  Next payload: TSi, reserved: 0x0, length: 52
      IKEv2-PROTO-4:   last proposal: 0x0, reserved: 0x0, 
         length: 48 Proposal: 1, Protocol id: ESP, SPI size: 4, 
         #trans: 4
      IKEv2-PROTO-4:     last transform: 0x3, reserved: 0x0: 
         length: 12 type: 1, reserved: 0x0, id: AES-CBC
      IKEv2-PROTO-4:     last transform: 0x3, reserved: 0x0: 
         length: 8 type: 3, reserved: 0x0, id: SHA96
      IKEv2-PROTO-4:     last transform: 0x3, reserved: 0x0: 
         length: 8 type: 3, reserved: 0x0, id: MD596
      IKEv2-PROTO-4:     last transform: 0x0, reserved: 0x0: 
         length: 8 type: 5, reserved: 0x0, id:
      TSi  Next payload: TSr, reserved: 0x0, length: 24
          Num of TSs: 1, reserved 0x0, reserved 0x0
          TS type: TS_IPV4_ADDR_RANGE, proto id: 0, length: 16
          start port: 0, end port: 65535
          start addr: 192.168.1.1, end addr: 192.168.1.1
      TSr  Next payload: NOTIFY, reserved: 0x0, length: 24
          Num of TSs: 1, reserved 0x0, reserved 0x0
          TS type: TS_IPV4_ADDR_RANGE, proto id: 0, length: 16
          start port: 0, end port: 65535
          start addr: 192.168.2.99, end addr: 192.168.2.99
      IKEv2-PROTO-5: (16): SM Trace-> SA: I_SPI=DFA3B583A4369958 
         R_SPI=27C943C13FD94665 (R) MsgID = 00000001 
         CurState: R_WAIT_AUTH Event: EV_RECV_AUTH
      IKEv2-PROTO-3: (16): Stopping timer to wait for auth 
         message
      IKEv2-PROTO-5: (16): SM Trace-> SA: I_SPI=DFA3B583A4369958 
         R_SPI=27C943C13FD94665 (R) MsgID = 00000001 
         CurState: R_WAIT_AUTH Event: EV_CHK_NAT_T
      IKEv2-PROTO-3: (16): Check NAT discovery
      IKEv2-PROTO-5: (16): SM Trace-> SA: I_SPI=DFA3B583A4369958 
         R_SPI=27C943C13FD94665 (R) MsgID = 00000001 
         CurState: R_WAIT_AUTH Event: EV_PROC_ID
      IKEv2-PROTO-2: (16): Recieved valid parameteres in 
         process id
      IKEv2-PLAT-3: (16) peer auth method set to: 2
      IKEv2-PROTO-5: (16): SM Trace-> SA: I_SPI=DFA3B583A4369958 
         R_SPI=27C943C13FD94665 (R) MsgID = 00000001 
         CurState: R_WAIT_AUTH 
         Event: EV_CHK_IF_PEER_CERT_NEEDS_TO_BE_FETCHED_FOR_
         PROF_SEL
      IKEv2-PROTO-5: (16): SM Trace-> SA: I_SPI=DFA3B583A4369958 
         R_SPI=27C943C13FD94665 (R) MsgID = 00000001 
         CurState: R_WAIT_AUTH Event: EV_GET_POLICY_BY_PEERID
      IKEv2-PROTO-3: (16): Getting configured policies
      IKEv2-PLAT-3: attempting to find tunnel group for 
         ID: 10.0.0.1
      IKEv2-PLAT-3: mapped to tunnel group 10.0.0.1 using 
         phase 1 ID
      IKEv2-PLAT-3: (16) tg_name set to: 10.0.0.1
      IKEv2-PLAT-3: (16) tunn grp type set to: L2L
      IKEv2-PLAT-3: my_auth_method = 2
      IKEv2-PLAT-3: supported_peers_auth_method = 2
      IKEv2-PLAT-3: P1 ID = 0
      IKEv2-PLAT-3: Translating IKE_ID_AUTO to = 255
      
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=27C943C13FD94665 (R) 
         MsgID = 00000001 CurState: R_WAIT_AUTH 
         Event: EV_SET_POLICY
      IKEv2-PROTO-3: (16): Setting configured policies
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=27C943C13FD94665 (R) 
         MsgID = 00000001 CurState: R_WAIT_AUTH 
         Event: EV_VERIFY_POLICY_BY_PEERID
      IKEv2-PROTO-3: (16): Verify peer's policy
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=27C943C13FD94665 (R) 
         MsgID = 00000001 
         CurState: R_WAIT_AUTH Event: EV_CHK_CONFIG_MODE
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=27C943C13FD94665 (R) 
         MsgID = 00000001 CurState: R_WAIT_AUTH 
         Event: EV_CHK_AUTH4EAP
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=27C943C13FD94665 (R) 
         MsgID = 00000001 CurState: R_WAIT_AUTH 
         Event: EV_CHK_POLREQEAP
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=27C943C13FD94665 (R) 
         MsgID = 00000001 CurState: R_VERIFY_AUTH 
         Event: EV_CHK_AUTH_TYPE
      IKEv2-PROTO-3: (16): Get peer authentication method
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=27C943C13FD94665 (R) 
         MsgID = 00000001 CurState: R_VERIFY_AUTH 
         Event: EV_GET_PRESHR_KEY
      IKEv2-PROTO-3: (16): Get peer's preshared key for 10.0.0.1
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=27C943C13FD94665 (R) 
         MsgID = 00000001 CurState: R_VERIFY_AUTH 
         Event: EV_VERIFY_AUTH
      
      IKEv2-PROTO-3: (16): Verify authentication data
      IKEv2-PROTO-3: (16): Use preshared key for id 10.0.0.1, 
         key len 5
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=27C943C13FD94665 (R) 
         MsgID = 00000001 CurState: R_VERIFY_AUTH 
         Event: EV_GET_CONFIG_MODE
      IKEv2-PLAT-2: Build config mode reply: no request stored
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=27C943C13FD94665 (R) 
         MsgID = 00000001 CurState: R_VERIFY_AUTH 
         Event: EV_CHK4_IC
      IKEv2-PROTO-3: (16): Processing initial contact
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=27C943C13FD94665 (R) 
         MsgID = 00000001 CurState: R_VERIFY_AUTH 
         Event: EV_CHK_REDIRECT
      IKEv2-PROTO-5: (16): Redirect check is not needed, 
         skipping it
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=27C943C13FD94665 (R) 
         MsgID = 00000001 CurState: R_VERIFY_AUTH 
         Event: EV_PROC_SA_TS
      IKEv2-PROTO-2: (16): Processing auth message
      IKEv2-PLAT-3: Selector received from peer is accepted
      IKEv2-PLAT-3: PROXY MATCH on crypto map 
         outside_map seq 1
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=27C943C13FD94665 (R) 
         MsgID = 00000001 CurState: R_VERIFY_AUTH 
         Event: EV_NO_EVENT
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=27C943C13FD94665 (R) 
         MsgID = 00000001 CurState: R_VERIFY_AUTH 
         Event: EV_OK_RECD_IPSEC_RESP
    IKEv2-PROTO-2: (16): Processing auth message

    ASA2는 다음을 포함하는 IKE_AUTH 패킷을 전송합니다.

    • ISAKMP 헤더(SPI/버전/플래그)

    • IDr(응답자 ID)

    • 인증 페이로드

    • SAr2(IKEv1의 2단계 변환 세트 교환과 유사한 SA를 시작)

    • TSi 및 TSr(initiator 및 responder 트래픽 선택기)

    참고: TSi 및 TSr에는 각각 암호화된 트래픽을 전달/수신하기 위한 initiator 및 responder의 소스 및 목적지 주소가 포함되어 있습니다. 주소 범위는 해당 범위를 오가는 모든 트래픽이 터널링되도록 지정합니다. 이러한 매개변수는 ASA1에서 수신한 매개변수와 동일합니다.

    디버그 출력은 다음과 같습니다.

    IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=27C943C13FD94665 (R) 
         MsgID = 00000001 CurState: R_BLD_AUTH 
         Event: EV_MY_AUTH_METHOD
      IKEv2-PROTO-3: (16): Get my authentication method
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=27C943C13FD94665 (R) 
         MsgID = 00000001 CurState: R_BLD_AUTH 
         Event: EV_GET_PRESHR_KEY
      IKEv2-PROTO-3: (16): Get peer's preshared key for 10.0.0.1
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=27C943C13FD94665 (R) 
         MsgID = 00000001 CurState: R_BLD_AUTH 
         Event: EV_GEN_AUTH
      IKEv2-PROTO-3: (16): Generate my authentication data
      IKEv2-PROTO-3: (16): Use preshared key for id 10.0.0.2, 
         key len 5
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=27C943C13FD94665 (R) 
         MsgID = 00000001 CurState: R_BLD_AUTH 
         Event: EV_CHK4_SIGN
      IKEv2-PROTO-3: (16): Get my authentication method
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=27C943C13FD94665 (R) 
         MsgID = 00000001 CurState: R_BLD_AUTH 
         Event: EV_OK_AUTH_GEN
      IKEv2-PROTO-5: (16): SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 R_SPI=27C943C13FD94665 (R) 
         MsgID = 00000001 CurState: R_BLD_AUTH 
         Event: EV_SEND_AUTH
      IKEv2-PROTO-2: (16): Sending auth message
      IKEv2-PROTO-5: Construct Vendor Specific Payload: 
         CISCO-GRANITE
      IKEv2-PROTO-3:   ESP Proposal: 1, SPI size: 4 (IPSec 
         negotiation),
      Num. transforms: 3
         AES-CBC   SHA96
      IKEv2-PROTO-5: Construct Notify Payload: 
         ESP_TFC_NO_SUPPORTIKEv2-PROTO-5: 
         Construct Notify Payload: NON_FIRST_FRAGSIKEv2-PROTO-3:
           (16):
      Building packet for encryption; contents are:
      VID  Next payload: IDr, reserved: 0x0, length: 20
           25 c9 42 c1 2c ee b5 22 3d b7 84 1a 75 e6 83 a6
      IDr  Next payload: AUTH, reserved: 0x0, 
         length: 12 Id type: IPv4 address, Reserved: 0x0 0x0
           51 01 01 01
      AUTH  Next payload: SA, reserved: 0x0, 
         length: 28 Auth method PSK, reserved: 0x0, reserved 0x0
      Auth data: 20 bytes
      SA  Next payload: TSi, reserved: 0x0, 
         length: 44 IKEv2-PROTO-4:   last proposal: 0x0, 
         reserved: 0x0, length: 40
        Proposal: 1, Protocol id: ESP, SPI size: 4, #trans: 3
      IKEv2-PROTO-4:     last transform: 0x3, reserved: 0x0: 
         length: 12 type: 1, reserved: 0x0, id: AES-CBC
      IKEv2-PROTO-4:     last transform: 0x3, reserved: 0x0: 
         length: 8 type: 3, reserved: 0x0, id: SHA96
      IKEv2-PROTO-4:     last transform: 0x0, reserved: 0x0: 
         length: 8 type: 5, reserved: 0x0, id:
      
      TSi  Next payload: TSr, reserved: 0x0, 
         length: 24 Num of TSs: 1, reserved 0x0, reserved 0x0
          TS type: TS_IPV4_ADDR_RANGE, proto id: 0, length: 16
          start port: 0, end port: 65535
          start addr: 192.168.1.1, end addr: 192.168.1.1
      TSr  Next payload: NOTIFY, reserved: 0x0, 
         length: 24 Num of TSs: 1, reserved 0x0, reserved 0x0
          TS type: TS_IPV4_ADDR_RANGE, proto id: 0, length: 16
          start port: 0, end port: 65535
          start addr: 192.168.2.99, end addr: 192.168.2.99
      NOTIFY(ESP_TFC_NO_SUPPORT)  Next payload: NOTIFY, 
         reserved: 0x0, length: 8 Security protocol id: IKE, 
         spi size: 0, type: ESP_TFC_NO_SUPPORT
      NOTIFY(NON_FIRST_FRAGS)  Next payload: NONE, reserved: 0x0, 
         length: 8 Security protocol id: IKE, spi size: 0, 
         type: NON_FIRST_FRAGS
      IKEv2-PROTO-3: Tx [L 10.0.0.2:500/R 10.0.0.1:500/VRF i0:f0] 
         m_id: 0x1
      IKEv2-PROTO-3: HDR[i:DFA3B583A4369958 - r: 27C943C13FD94665]
      IKEv2-PROTO-4: IKEV2 HDR ispi: DFA3B583A4369958 - 
         rspi: 27C943C13FD94665
      IKEv2-PROTO-4: Next payload: ENCR, version: 2.0
      IKEv2-PROTO-4: Exchange type: IKE_AUTH, flags: 
         RESPONDER MSG-RESPONSE
      IKEv2-PROTO-4: Message id: 0x1, length: 236
      ENCR  Next payload: VID, reserved: 0x0, length: 208
    Encrypted data: 204 bytes

    ASA2는 IKE_AUTH 패킷에 대한 응답을 전송합니다.

    IKEv2-PLAT-4: SENT PKT [IKE_AUTH] 
         [10.0.0.2]:500->[10.0.0.1]:500 
         InitSPI=0xdfa3b583a4369958 RespSPI=0x27c943c13fd94665 
       MID=00000001

    ASA1이 ASA2로부터 응답을 수신합니다.

    IKEv2-PLAT-4: 
         RECV PKT [IKE_AUTH] 
         [10.0.0.2]:500->
         [10.0.0.1]:500 
         InitSPI=0xdfa3b583a4369958 
         RespSPI=0x27c943c13fd94665 
       MID=00000001

    ASA2는 SA 데이터베이스(SAD)에 항목을 삽입합니다.

    IKEv2-PROTO-5: (16): 
         SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 
         R_SPI=27C943C13FD94665 (R) 
         MsgID = 00000001 
         CurState: AUTH_DONE 
         Event: EV_OK
      IKEv2-PROTO-5: (16): Action: 
         Action_Null
      IKEv2-PROTO-5: (16): 
         SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 
         R_SPI=27C943C13FD94665 (R) 
         MsgID = 00000001 
         CurState: AUTH_DONE 
         Event: EV_PKI_SESH_CLOSE
      IKEv2-PROTO-3: (16): Closing  
         the PKI session
      IKEv2-PROTO-5: (16): 
         SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 
         R_SPI=27C943C13FD94665 (R) 
         MsgID = 00000001 
         CurState: AUTH_DONE 
         Event: EV_INSERT_IKE
      IKEv2-PROTO-2: (16): 
         SA created; 
       inserting SA into database

    ASA1은 이 패킷의 인증 데이터를 확인 및 처리한 다음 이 SA를 SAD에 삽입합니다.

    IKEv2-PROTO-3: Rx [L 10.0.0.1:500/R 10.0.0.2:500/VRF i0:f0] 
         m_id: 0x1
      IKEv2-PROTO-3: HDR[i:DFA3B583A4369958 - r: 27C943C13FD94665]
      IKEv2-PROTO-4: IKEV2 HDR ispi: DFA3B583A4369958 - 
         rspi: 27C943C13FD94665
      IKEv2-PROTO-4: Next payload: ENCR, version: 2.0
      IKEv2-PROTO-4: Exchange type: IKE_AUTH, 
         flags: RESPONDER MSG-RESPONSE
      IKEv2-PROTO-4: Message id: 0x1, length: 236
      REAL Decrypted packet:Data: 168 bytes
      IKEv2-PROTO-5: Parse Vendor Specific Payload: (CUSTOM) VID  
         Next payload: IDr, reserved: 0x0, length: 20
      
           25 c9 42 c1 2c ee b5 22 3d b7 84 1a 75 e6 83 a6
      IDr  Next payload: AUTH, reserved: 0x0, length: 12
          Id type: IPv4 address, Reserved: 0x0 0x0
      
           51 01 01 01
      AUTH  Next payload: SA, reserved: 0x0, length: 28
          Auth method PSK, reserved: 0x0, reserved 0x0
      Auth data: 20 bytes
      SA  Next payload: TSi, reserved: 0x0, length: 44
      IKEv2-PROTO-4:   last proposal: 0x0, reserved: 0x0, 
         length: 40 Proposal: 1, Protocol id: ESP, SPI size: 4, 
         #trans: 3
      IKEv2-PROTO-4:     last transform: 0x3, reserved: 0x0: 
         length: 12 type: 1, reserved: 0x0, id: AES-CBC
      IKEv2-PROTO-4:     last transform: 0x3, reserved: 0x0: 
         length: 8 type: 3, reserved: 0x0, id: SHA96
      IKEv2-PROTO-4:     last transform: 0x0, reserved: 0x0: 
         length: 8 type: 5, reserved: 0x0, id:
      
         TSi  Next payload: TSr, reserved: 0x0, 
         length: 24 Num of TSs: 1, reserved 0x0, reserved 0x0
          TS type: TS_IPV4_ADDR_RANGE, proto id: 0, length: 16
          start port: 0, end port: 65535
          start addr: 192.168.1.1, end addr: 192.168.1.1
      TSr  Next payload: NOTIFY, reserved: 0x0, 
         length: 24 Num of TSs: 1, reserved 0x0, reserved 0x0
          TS type: TS_IPV4_ADDR_RANGE, proto id: 0, length: 16
          start port: 0, end port: 65535
          start addr: 192.168.2.99, end addr: 192.168.2.99
      IKEv2-PROTO-5: Parse Notify Payload: 
         ESP_TFC_NO_SUPPORT NOTIFY(ESP_TFC_NO_SUPPORT)  
         Next payload: NOTIFY, reserved: 0x0, length: 8
          Security protocol id: IKE, spi size: 0, 
         type: ESP_TFC_NO_SUPPORT
      IKEv2-PROTO-5: Parse Notify Payload: 
         NON_FIRST_FRAGS NOTIFY(NON_FIRST_FRAGS)  Next payload:
         NONE, reserved: 0x0, length: 8
          Security protocol id: IKE, spi size: 0, 
         type: NON_FIRST_FRAGS
      Decrypted packet:Data: 236 bytes
      IKEv2-PROTO-5: (16): SM Trace-> SA: I_SPI=DFA3B583A4369958 
         R_SPI=27C943C13FD94665 (I) MsgID = 00000001 
         CurState: I_WAIT_AUTH Event: EV_RECV_AUTH
      IKEv2-PROTO-5: (16): Action: Action_Null
      IKEv2-PROTO-5: (16): SM Trace-> SA: I_SPI=DFA3B583A4369958 
         R_SPI=27C943C13FD94665 (I) MsgID = 00000001 
         CurState: I_PROC_AUTH Event: EV_CHK4_NOTIFY
      IKEv2-PROTO-2: (16): Process auth response notify
      IKEv2-PROTO-5: (16): SM Trace-> SA: I_SPI=DFA3B583A4369958 
         R_SPI=27C943C13FD94665 (I) MsgID = 00000001 
         CurState: I_PROC_AUTH Event: EV_PROC_MSG
      IKEv2-PLAT-3: (16) peer auth method set to: 2
      IKEv2-PROTO-5: (16): SM Trace-> SA: I_SPI=DFA3B583A4369958 
         R_SPI=27C943C13FD94665 (I) MsgID = 00000001 
         CurState: I_PROC_AUTH 
         Event: EV_CHK_IF_PEER_CERT_NEEDS_TO_BE_FETCHED_
         FOR_PROF_SEL
      IKEv2-PROTO-5: (16): SM Trace-> SA: I_SPI=DFA3B583A4369958 
         R_SPI=27C943C13FD94665 (I) MsgID = 00000001 
         CurState: I_PROC_AUTH Event: EV_GET_POLICY_BY_PEERID
      IKEv2-PROTO-3: (16): Getting configured policies
      IKEv2-PLAT-3: connection initiated with tunnel 
         group 10.0.0.2
      IKEv2-PLAT-3: (16) tg_name set to: 10.0.0.2
      IKEv2-PLAT-3: (16) tunn grp type set to: L2L
      IKEv2-PLAT-3: my_auth_method = 2
      IKEv2-PLAT-3: supported_peers_auth_method = 2
      IKEv2-PLAT-3: P1 ID = 0
      IKEv2-PLAT-3: Translating IKE_ID_AUTO to = 255
      IKEv2-PROTO-5: (16): SM Trace-> SA: I_SPI=DFA3B583A4369958 
         R_SPI=27C943C13FD94665 (I) MsgID = 00000001 
         CurState: I_PROC_AUTH Event: EV_VERIFY_POLICY_BY_PEERID
      IKEv2-PROTO-3: (16): Verify peer's policy
      IKEv2-PROTO-5: (16): SM Trace-> SA: I_SPI=DFA3B583A4369958 
         R_SPI=27C943C13FD94665 (I) MsgID = 00000001 
         CurState: I_PROC_AUTH Event: EV_CHK_AUTH_TYPE
      IKEv2-PROTO-3: (16): Get peer authentication method
      IKEv2-PROTO-5: (16): SM Trace-> SA: I_SPI=DFA3B583A4369958 
         R_SPI=27C943C13FD94665 (I) MsgID = 00000001 
         CurState: I_PROC_AUTH Event: EV_GET_PRESHR_KEY
      IKEv2-PROTO-3: (16): Get peer's preshared key for 10.0.0.2
      IKEv2-PROTO-5: (16): SM Trace-> SA: I_SPI=DFA3B583A4369958 
         R_SPI=27C943C13FD94665 (I) MsgID = 00000001 
         CurState: I_PROC_AUTH Event: EV_VERIFY_AUTH
      IKEv2-PROTO-3: (16): Verify authentication data
      IKEv2-PROTO-3: (16): Use preshared key for id 10.0.0.2, 
         key len 5
      IKEv2-PROTO-5: (16): SM Trace-> SA: I_SPI=DFA3B583A4369958 
         R_SPI=27C943C13FD94665 (I) MsgID = 00000001 
         CurState: I_PROC_AUTH Event: EV_CHK_EAP
      IKEv2-PROTO-3: (16): Check for EAP exchange
      IKEv2-PROTO-5: (16): SM Trace-> SA: I_SPI=DFA3B583A4369958 
         R_SPI=27C943C13FD94665 (I) MsgID = 00000001 
         CurState: I_PROC_AUTH Event: EV_CHK_CONFIG_MODE
      IKEv2-PROTO-5: (16): SM Trace-> SA: I_SPI=DFA3B583A4369958 
         R_SPI=27C943C13FD94665 (I) MsgID = 00000001 
         CurState: I_PROC_AUTH Event: EV_CHK_IKE_ONLY
      IKEv2-PROTO-5: (16): SM Trace-> SA: I_SPI=DFA3B583A4369958 
         R_SPI=27C943C13FD94665 (I) MsgID = 00000001 
         CurState: I_PROC_AUTH Event: EV_PROC_SA_TS
      IKEv2-PROTO-2: (16): Processing auth message
      IKEv2-PROTO-5: (16): SM Trace-> SA: I_SPI=DFA3B583A4369958 
         R_SPI=27C943C13FD94665 (I) MsgID = 00000001 
         CurState: AUTH_DONE Event: EV_OK
      IKEv2-PROTO-5: (16): Action: Action_Null
      IKEv2-PROTO-5: (16): SM Trace-> SA: I_SPI=DFA3B583A4369958 
         R_SPI=27C943C13FD94665 (I) MsgID = 00000001 
         CurState: AUTH_DONE Event: EV_PKI_SESH_CLOSE
      IKEv2-PROTO-3: (16): Closing the PKI session
      IKEv2-PROTO-5: (16): SM Trace-> SA: I_SPI=DFA3B583A4369958 
         R_SPI=27C943C13FD94665 (I) MsgID = 00000001 
         CurState: AUTH_DONE Event: EV_INSERT_IKE
      IKEv2-PROTO-2: (16): SA created; inserting SA into 
       database

    이제 터널이 ASA1에 대해 활성화됩니다.

    CONNECTION 
          STATUS: UP... 
         peer: 10.0.0.2:500, 
         phase1_id: 10.0.0.2
      IKEv2-PROTO-5: (16): 
         SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 
         R_SPI=27C943C13FD94665 (I) 
         MsgID = 00000001 
         CurState: AUTH_DONE 
       Event: EV_REGISTER_SESSION

    이제 터널이 ASA2에 대해 활성화됩니다.

    CONNECTION 
         STATUS: UP... 
         peer: 10.0.0.1:500, 
         phase1_id: 10.0.0.1
      IKEv2-PROTO-5: (16): 
         SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 
         R_SPI=27C943C13FD94665 (R) 
         MsgID = 00000001 
         CurState: AUTH_DONE 
       Event: EV_REGISTER_SESSION

    참고: responder 터널은 일반적으로 initiator 터널보다 먼저 활성화됩니다.

    IKEv2 등록 프로세스는 ASA1에서 발생합니다.

    IKEv2-PLAT-3: (16) 
         connection 
         auth hdl set to 15
      IKEv2-PLAT-3: AAA conn 
         attribute retrieval 
         successfully queued 
         for register session 
         request.
      IKEv2-PROTO-3: (16):
      IKEv2-PROTO-5: (16): 
         SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 
         R_SPI=27C943C13FD94665 (I) 
         MsgID = 00000001 
         CurState: AUTH_DONE 
         Event: EV_NO_EVENT
      IKEv2-PLAT-3: (16) idle 
         timeout set to: 30
      IKEv2-PLAT-3: (16) session 
         timeout set to: 0
      IKEv2-PLAT-3: (16) group 
         policy set to 
         DfltGrpPolicy
      IKEv2-PLAT-3: (16) class 
         attr set
      IKEv2-PLAT-3: (16) tunnel 
         protocol set to: 0x5c
      IKEv2-PLAT-3: IPv4 filter 
         ID not configured 
         for connection
      IKEv2-PLAT-3: (16) group 
         lock set to: none
      IKEv2-PLAT-3: IPv6 filter ID 
         not configured 
         for connection
      IKEv2-PLAT-3: (16) 
         connection attribues 
         set valid to TRUE
      IKEv2-PLAT-3: Successfully 
         retrieved conn attrs
      IKEv2-PLAT-3: Session 
         registration after conn 
         attr retrieval 
         PASSED, No error
      IKEv2-PLAT-3:
      CONNECTION STATUS: 
         REGISTERED... 
         peer: 10.0.0.2:500, 
       phase1_id: 10.0.0.2

    IKEv2 등록 프로세스는 ASA2에서 발생합니다.

    IKEv2-PLAT-3: (16) 
         connection 
         auth hdl set to 15
      IKEv2-PLAT-3: AAA conn 
         attribute retrieval 
         successfully queued for 
         register session request.
      IKEv2-PROTO-3: (16):
      IKEv2-PROTO-5: (16): 
         SM Trace-> 
         SA: I_SPI=DFA3B583A4369958 
         R_SPI=27C943C13FD94665 (R) 
         MsgID = 00000001 
         CurState: AUTH_DONE 
         Event: EV_NO_EVENT
      IKEv2-PLAT-3: (16) idle 
         timeout 
         set to: 30
      IKEv2-PLAT-3: (16) session 
         timeout 
         set to: 0
      IKEv2-PLAT-3: (16) group 
         policy set to 
         DfltGrpPolicy
      IKEv2-PLAT-3: (16) class 
         attr set
      IKEv2-PLAT-3: (16) tunnel 
         protocol set to: 0x5c
      IKEv2-PLAT-3: IPv4 filter ID 
         not configured 
         for connection
      IKEv2-PLAT-3: (16) group 
         lock set to: none
      IKEv2-PLAT-3: IPv6 filter ID 
         not configured 
         for connection
         attribues set 
         valid to TRUE
      IKEv2-PLAT-3: Successfully 
         retrieved conn attrs
      IKEv2-PLAT-3: Session 
         registration after conn 
         attr retrieval PASSED, 
         No error
      IKEv2-PLAT-3:
      CONNECTION STATUS: 
         REGISTERED... 
         peer: 10.0.0.1:500, 
       phase1_id: 10.0.0.1

    하위 SA 디버그

    참고: 이 교환은 단일 요청 및 응답 쌍으로 구성되며 IKEv1에서 2단계 교환이라고 합니다. 초기 교환이 완료된 후 IKE_SA의 어느 한 쪽 끝에 시작할 수 있습니다.

    ASA2는 CHILD_SA 교환을 시작합니다. CREATE_CHILD_SA 요청입니다. CHILD_SA 패킷에는 일반적으로 다음이 포함됩니다.

    • SA HDR - version.flags 및 exchange 유형이 포함됩니다.

    • Nonce Ni(선택 사항) - CHILD_SA가 초기 교환의 일부로 생성되는 경우 두 번째 KE(Key Exchange) 페이로드와 nonce를 보내지 않아야 합니다.

    • SA 페이로드

    • KEi(키-선택 사항) - CREATE_CHILD_SA 요청에는 CHILD_SA에 대한 전달 비밀성을 보다 강력하게 보장하기 위해 추가 DH 교환에 대한 KE 페이로드가 선택적으로 포함될 수 있습니다. SA에 다른 DH 그룹이 포함된 경우 KEi는 개시자가 응답자가 수락할 것으로 예상하는 그룹의 요소여야 합니다. 잘못 추측하면 CREATE_CHILD_SA 교환이 실패하고 다른 KEi로 다시 시도해야 합니다.

    • N(Notify payload, 선택 사항) - Notify Payload는 오류 조건 및 상태 전환과 같은 정보 데이터를 IKE 피어로 전송하는 데 사용됩니다. Notify Payload(알림 페이로드)는 응답 메시지(일반적으로 요청이 거부되는 이유를 지정함), 정보 교환(IKE 요청이 아닌 오류를 보고하기 위해) 또는 다른 메시지에 나타나 발신자 기능을 나타내거나 요청의 의미를 수정할 수 있습니다. 이 CREATE_CHILD_SA 교환이 IKE_SA가 아닌 현재 SA의 키를 다시 설정하는 경우 REKEY_SA 유형의 리드 N 페이로드는 다시 입력된 SA를 식별해야 합니다. 이 CREATE_CHILD_SA 교환이 현재 SA를 리키하지 않으면 N 페이로드를 생략해야 합니다.

    • TSi 및 TSr(선택 사항): SA가 생성된 트래픽 선택기를 표시합니다. 이 경우 호스트 192.168.1.12와 192.168.2.99 사이에 있습니다.

    다음은 CREATE_CHILD_SA 디버그 출력입니다.

    IKEv2-PLAT-5: INVALID PSH HANDLE
      IKEv2-PLAT-3: attempting to find tunnel group 
         for IP: 10.0.0.1
      IKEv2-PLAT-3: mapped to tunnel group 10.0.0.1 
         using peer IP
      IKEv2-PLAT-3: my_auth_method = 2
      IKEv2-PLAT-3: supported_peers_auth_method = 2
      IKEv2-PLAT-3: P1 ID = 0
      IKEv2-PLAT-3: Translating IKE_ID_AUTO to = 255
      IKEv2-PLAT-3: (226) tp_name set to:
      IKEv2-PLAT-3: (226) tg_name set to: 10.0.0.1
      IKEv2-PLAT-3: (226) tunn grp type set to: L2L
      IKEv2-PLAT-3: PSH cleanup
      IKEv2-PROTO-5: (225): SM Trace-> SA: 
         I_SPI=FD366326E1FED6FE R_SPI=A75B9B2582AAECB7 
         (I) MsgID = 00000001 CurState: READY 
         Event: EV_INIT_CREATE_CHILD
      IKEv2-PROTO-5: (225): Action: Action_Null
      IKEv2-PROTO-5: (225): SM Trace-> SA: 
         I_SPI=FD366326E1FED6FE R_SPI=A75B9B2582AAECB7 
         (I) MsgID = 00000001 CurState: CHILD_I_INIT 
         Event: EV_INIT_CREATE_CHILD
      IKEv2-PROTO-5: (225): Action: Action_Null
      IKEv2-PROTO-5: (225): SM Trace-> SA: 
         I_SPI=FD366326E1FED6FE R_SPI=A75B9B2582AAECB7 
         (I) MsgID = 00000001 CurState: CHILD_I_IPSEC 
         Event: EV_INIT_CREATE_CHILD
      IKEv2-PROTO-3: (225): Check for IPSEC rekey
      IKEv2-PROTO-5: (225): SM Trace-> SA: 
         I_SPI=FD366326E1FED6FE R_SPI=A75B9B2582AAECB7 
         (I) MsgID = 00000001 CurState: CHILD_I_IPSEC 
         Event: EV_SET_IPSEC_DH_GRP
      IKEv2-PROTO-3: (225): Set IPSEC DH group
      IKEv2-PROTO-5: (225): SM Trace-> SA: 
         I_SPI=FD366326E1FED6FE R_SPI=A75B9B2582AAECB7 
         (I) MsgID = 00000001 
         CurState: CHILD_I_IPSEC Event: EV_CHK4_PFS
      IKEv2-PROTO-3: (225): Checking for PFS configuration
      IKEv2-PROTO-5: (225): SM Trace-> SA: 
         I_SPI=FD366326E1FED6FE R_SPI=A75B9B2582AAECB7 
         (I) MsgID = 00000001 CurState: CHILD_I_IPSEC 
         Event: EV_BLD_MSG
      IKEv2-PROTO-2: (225): Sending child SA exchange
      IKEv2-PROTO-3: ESP Proposal: 1, SPI size: 4 
         (IPSec negotiation), num. transforms: 4
         AES-CBC SHA96 MD596
      IKEv2-PROTO-3: (225): Building packet for encryption; 
         contents are:
         SA Next payload: N, reserved: 0x0, length: 52
      IKEv2-PROTO-4: last proposal: 0x0, reserved: 0x0, 
         length: 48 Proposal: 1, Protocol id: ESP, 
         SPI size: 4, #trans: 4
      IKEv2-PROTO-4: last transform: 0x3, reserved: 0x0: 
         length: 12 type: 1, reserved: 0x0, id: AES-CBC
      IKEv2-PROTO-4: last transform: 0x3, reserved: 0x0:  
        length: 8 type: 3, reserved: 0x0, id: SHA96
      IKEv2-PROTO-4: last transform: 0x3, reserved: 0x0: 
         length: 8 type: 3, reserved: 0x0, id: MD596
      IKEv2-PROTO-4: last transform: 0x0, reserved: 0x0: 
         length: 8 type: 5, reserved: 0x0, id:
      
      N Next payload: TSi, reserved: 0x0, length: 24
      
      2d 3e ec 11 e0 c7 5d 67 d5 23 25 76 1d 50 0d 05
      fa b7 f0 48
      TSi Next payload: TSr, reserved: 0x0, length: 24
      Num of TSs: 1, reserved 0x0, reserved 0x0
      TS type: TS_IPV4_ADDR_RANGE, proto id: 0, length: 16
      start port: 0, end port: 65535
      start addr: 192.168.2.99, end addr: 192.168.2.99
      TSr Next payload: NONE, reserved: 0x0, length: 24
      Num of TSs: 1, reserved 0x0, reserved 0x0
      TS type: TS_IPV4_ADDR_RANGE, proto id: 0, length: 16
      start port: 0, end port: 65535
      start addr: 192.168.1.12, end addr: 192.168.1.12
      
      IKEv2-PROTO-3: (225): Checking if request will fit in 
         peer window
      IKEv2-PROTO-3: Tx [L 10.0.0.2:500/R 10.0.0.1:500/VRF i0:f0] 
         m_id: 0x6
      IKEv2-PROTO-3: HDR[i:FD366326E1FED6FE - 
         r: A75B9B2582AAECB7]
      IKEv2-PROTO-4: IKEV2 HDR ispi: FD366326E1FED6FE - 
         rspi: A75B9B2582AAECB7
      IKEv2-PROTO-4: Next payload: ENCR, version: 2.0
      IKEv2-PROTO-4: Exchange type: CREATE_CHILD_SA, 
         flags: INITIATOR
      IKEv2-PROTO-4: Message id: 0x6, length: 180
      ENCR Next payload: SA, reserved: 0x0, length: 152
    Encrypted data: 148 bytes

    ASA2는 이 패킷을 전송하고 응답을 기다립니다.

    IKEv2-PLAT-4: SENT PKT 
         [CREATE_CHILD_SA]
         [10.0.0.2]:500->
         [10.0.0.1]:500 
         InitSPI=0xfd366326e1fed6fe 
         RespSPI=0xa75b9b2582aaecb7 
         MID=00000006
      
      IKEv2-PROTO-5: (225): 
         SM Trace-> 
         SA: I_SPI=FD366326E1FED6FE 
         R_SPI=A75B9B2582AAECB7 (I) 
         MsgID = 00000006 
         CurState: CHILD_I_WAIT 
       Event: EV_NO_EVENT

    ASA1이 패킷을 수신합니다.

    IKEv2-PLAT-4: 
         RECV PKT [CREATE_CHILD_SA] 
         [10.0.0.2]:500->
         [10.0.0.1]:500 
         InitSPI=0xfd366326e1fed6fe 
         RespSPI=0xa75b9b2582aaecb7 
         MID=00000006
      
      IKEv2-PROTO-3: Rx 
         [L 10.0.0.1:500/R 
         10.0.0.2:500/VRF i0:f0] 
       m_id: 0x6

    그런 다음 ASA1은 ASA2에서 이 정확한 패킷을 수신하고 다음을 확인합니다.

    IKEv2-PROTO-3: HDR[i:FD366326E1FED6FE - 
         r: A75B9B2582AAECB7]
      IKEv2-PROTO-4: IKEV2 HDR ispi: FD366326E1FED6FE - 
         rspi: A75B9B2582AAECB7
      IKEv2-PROTO-4: Next payload: ENCR, version: 2.0
      IKEv2-PROTO-4: Exchange type: CREATE_CHILD_SA, 
         flags: INITIATOR 
      IKEv2-PROTO-4: Message id: 0x6, length: 180
      IKEv2-PROTO-5: (225): Request has mess_id 6; 
         expected 6 through 6
         REAL Decrypted packet:Data: 124 bytes
         SA Next payload: N, reserved: 0x0, length: 52
      IKEv2-PROTO-4: last proposal: 0x0, reserved: 0x0, 
         length: 48 Proposal: 1, Protocol id: ESP, 
         SPI size: 4, #trans: 4
      IKEv2-PROTO-4: last transform: 0x3, reserved: 0x0: 
         length: 12 ype: 1, reserved: 0x0, id: AES-CBC
      IKEv2-PROTO-4: last transform: 0x3, reserved: 0x0: 
         length: 8 type: 3, reserved: 0x0, id: SHA96
      IKEv2-PROTO-4: last transform: 0x3, reserved: 0x0: 
         length: 8 type: 3, reserved: 0x0, id: MD596
      IKEv2-PROTO-4: last transform: 0x0, reserved: 0x0: 
         length: 8 type: 5, reserved: 0x0, id:
      
      N Next payload: TSi, reserved: 0x0, length: 24
      
      2d 3e ec 11 e0 c7 5d 67 d5 23 25 76 1d 50 0d 05
      fa b7 f0 48
      TSi Next payload: TSr, reserved: 0x0, length: 24
      Num of TSs: 1, reserved 0x0, reserved 0x0
      TS type: TS_IPV4_ADDR_RANGE, proto id: 0, length: 16
      start port: 0, end port: 65535
      start addr: 192.168.2.99, end addr: 192.168.2.99
      TSr Next payload: NONE, reserved: 0x0, length: 24
      Num of TSs: 1, reserved 0x0, reserved 0x0
      TS type: TS_IPV4_ADDR_RANGE, proto id: 0, length: 16
      start port: 0, end port: 65535
      start addr: 192.168.1.12, end addr: 192.168.1.12
      Decrypted packet:Data: 180 bytes
      IKEv2-PROTO-5: (225): SM Trace-> 
         SA: I_SPI=FD366326E1FED6FE R_SPI=A75B9B2582AAECB7 (R) 
         MsgID = 00000006 CurState: READY 
         Event: EV_RECV_CREATE_CHILD
      IKEv2-PROTO-5: (225): Action: Action_Null
      IKEv2-PROTO-5: (225): SM Trace-> 
         SA: I_SPI=FD366326E1FED6FE R_SPI=A75B9B2582AAECB7 (R) 
         MsgID = 00000006 CurState: CHILD_R_INIT 
         Event: EV_RECV_CREATE_CHILD
      IKEv2-PROTO-5: (225): Action: Action_Null
      IKEv2-PROTO-5: (225): SM Trace-> 
         SA: I_SPI=FD366326E1FED6FE R_SPI=A75B9B2582AAECB7 (R) 
         MsgID = 00000006 CurState: CHILD_R_INIT 
         Event: EV_VERIFY_MSG
      IKEv2-PROTO-3: (225): Validating create child message
      IKEv2-PROTO-5: (225): SM Trace-> 
         SA: I_SPI=FD366326E1FED6FE R_SPI=A75B9B2582AAECB7 (R) 
         MsgID = 00000006 urState: CHILD_R_INIT 
       Event: EV_CHK_CC_TYPE

    이제 ASA1에서 CHILD_SA 교환에 대한 회신을 작성합니다. 이것은 CREATE_CHILD_SA 응답입니다. CHILD_SA 패킷에는 일반적으로 다음이 포함됩니다.

    • SA HDR - version.flags 및 exchange 유형이 포함됩니다.

    • Nonce Ni(선택 사항) - CHILD_SA가 초기 교환의 일부로 생성되는 경우 두 번째 KE 페이로드와 nonce를 보내지 않아야 합니다.

    • SA 페이로드

    • KEi(키, 선택 사항) - CREATE_CHILD_SA 요청은 CHILD_SA에 대한 전달 비밀성을 보다 강력하게 보장하기 위해 추가 DH 교환에 대한 KE 페이로드를 선택적으로 포함할 수 있습니다. SA에 다른 DH 그룹이 포함된 경우 KEi는 개시자가 응답자가 수락할 것으로 예상하는 그룹의 요소여야 합니다. 잘못 추측하면 CREATE_CHILD_SA 교환이 실패하며 다른 KEi로 다시 시도해야 합니다.

    • N(Notify payload, 선택 사항) - Notify Payload는 오류 조건 및 상태 전환과 같은 정보 데이터를 IKE 피어로 전송하는 데 사용됩니다. Notify Payload(알림 페이로드)는 응답 메시지(일반적으로 요청이 거부되는 이유를 지정함), 정보 교환(IKE 요청에 없는 오류를 보고하기 위해) 또는 다른 메시지에 나타나 발신자 기능을 나타내거나 요청의 의미를 수정할 수 있습니다. 이 CREATE_CHILD_SA 교환이 IKE_SA가 아닌 현재 SA의 키를 다시 설정하는 경우 REKEY_SA 유형의 리드 N 페이로드는 다시 입력된 SA를 식별해야 합니다. 이 CREATE_CHILD_SA 교환이 현재 SA를 리키하지 않으면 N 페이로드를 생략해야 합니다.

    • TSi 및 TSr(선택 사항) - SA가 생성된 트래픽 선택기를 표시합니다. 이 경우 호스트 192.168.1.12와 192.168.2.99 사이에 있습니다.

    디버그 출력은 다음과 같습니다.

    IKEv2-PROTO-3: (225): Check for create child 
         response message type
      IKEv2-PROTO-5: (225): SM Trace->  
         SA:I_SPI=FD366326E1FED6FE R_SPI=A75B9B2582AAECB7 (R) 
         MsgID = 00000006 CurState: CHILD_R_IPSEC 
         Event: EV_PROC_MSG
      IKEv2-PROTO-2: (225): Processing child 
         SA exchange
      IKEv2-PLAT-3: Selector received from peer 
         is accepted
      IKEv2-PLAT-3: PROXY MATCH on crypto map 
         outside_map seq 1
      IKEv2-PROTO-5: (225): SM Trace->  
         SA:I_SPI=FD366326E1FED6FE 
         R_SPI=A75B9B2582AAECB7 (R) MsgID = 00000006 
         CurState: CHILD_R_IPSEC Event: EV_NO_EVENT
      IKEv2-PROTO-5: (225): SM Trace->  
         SA:I_SPI=FD366326E1FED6FE 
         R_SPI=A75B9B2582AAECB7 (R) MsgID = 00000005 
         CurState: EXIT Event: EV_FREE_NEG
      IKEv2-PROTO-5: (225): Deleting negotiation context 
         for peer message ID: 0x5
      IKEv2-PROTO-5: (225): SM Trace->  
         SA:I_SPI=FD366326E1FED6FE 
         R_SPI=A75B9B2582AAECB7 (R) MsgID = 00000006 
         CurState: CHILD_R_IPSEC 
         Event: EV_OK_RECD_IPSEC_RESP
      IKEv2-PROTO-5: (225): Action: Action_Null
      IKEv2-PROTO-5: (225): SM Trace->  
         SA:I_SPI=FD366326E1FED6FE 
         R_SPI=A75B9B2582AAECB7 (R) MsgID = 00000006 
         CurState: CHILD_R_IPSEC Event: EV_PROC_MSG
      IKEv2-PROTO-2: (225): Processing child SA exchange
      IKEv2-PROTO-5: (225): SM Trace->  
         SA:I_SPI=FD366326E1FED6FE R_SPI=A75B9B2582AAECB7 (R) 
         MsgID = 00000006 CurState: 
         CHILD_R_IPSEC Event: EV_SET_IPSEC_DH_GRP
      IKEv2-PROTO-3: (225): Set IPSEC DH group
      IKEv2-PROTO-5: (225): SM Trace->  
         SA:I_SPI=FD366326E1FED6FE 
         R_SPI=A75B9B2582AAECB7 (R) MsgID = 00000006 
         CurState: CHILD_R_IPSEC Event: EV_OK
      IKEv2-PROTO-3: (225): Requesting SPI from IPSec
      IKEv2-PROTO-5: (225): SM Trace->  
         SA:I_SPI=FD366326E1FED6FE 
         R_SPI=A75B9B2582AAECB7 (R) MsgID = 00000006 
         CurState: CHILD_R_WAIT_SPI Event: EV_OK_GOT_SPI
      IKEv2-PROTO-5: (225): Action: Action_Null
      IKEv2-PROTO-5: (225): SM Trace->  
         SA:I_SPI=FD366326E1FED6FE 
         R_SPI=A75B9B2582AAECB7 (R) MsgID = 00000006 
         CurState: CHILD_R_BLD_MSG Event: EV_CHK4_PFS
      IKEv2-PROTO-3: (225): Checking for PFS configuration
      IKEv2-PROTO-5: (225): SM Trace->  
         SA:I_SPI=FD366326E1FED6FE 
         R_SPI=A75B9B2582AAECB7 (R) MsgID = 00000006 
         CurState: CHILD_R_BLD_MSG Event: EV_BLD_MSG
      IKEv2-PROTO-2: (225): Sending child SA exchange
      IKEv2-PROTO-3: ESP Proposal: 1, SPI size: 4 
        (IPSec negotiation),
      Num. transforms: 3
      AES-CBC SHA96 
      IKEv2-PROTO-3: (225): Building packet for encryption; 
         contents are:
      SA Next payload: N, reserved: 0x0, length: 44
      IKEv2-PROTO-4: last proposal: 0x0, reserved: 0x0, 
         length: 40
      Proposal: 1, Protocol id: ESP, SPI size: 4, 
         #trans: 3
      IKEv2-PROTO-4: last transform: 0x3, reserved: 0x0: 
         length: 12
      type: 1, reserved: 0x0, id: AES-CBC
      IKEv2-PROTO-4: last transform: 0x3, reserved: 0x0: 
         length: 8
      type: 3, reserved: 0x0, id: SHA96
      IKEv2-PROTO-4: last transform: 0x0, 
         reserved: 0x0: length: 8
      type: 5, reserved: 0x0, id:
      
      N Next payload: TSi, reserved: 0x0, 
         length: 24
      
      b7 6a c6 75 53 55 99 5a df ee 05 
         18 1a 27 a6 cb
      01 56 22 ad
      TSi Next payload: TSr, reserved: 0x0, 
         length: 24
      Num of TSs: 1, reserved 0x0, reserved 0x0
      TS type: TS_IPV4_ADDR_RANGE, proto id: 0, 
         length: 16
      start port: 0, end port: 65535
      start addr: 192.168.2.99, 
         end addr: 192.168.2.99
      TSr Next payload: NONE, reserved: 0x0, 
         length: 24
      Num of TSs: 1, reserved 0x0, reserved 0x0
      TS type: TS_IPV4_ADDR_RANGE, proto id: 0, 
         length: 16
      start port: 0, end port: 65535
      start addr: 192.168.1.12, end addr: 192.168.1.12
      
      IKEv2-PROTO-3: Tx 
         [L 10.0.0.1:500/R 10.0.0.2:500/VRF i0:f0] 
         m_id: 0x6
      IKEv2-PROTO-3: HDR[i:FD366326E1FED6FE - 
         r: A75B9B2582AAECB7]
      IKEv2-PROTO-4: IKEV2 HDR ispi: FD366326E1FED6FE - 
         rspi: A75B9B2582AAECB7
      IKEv2-PROTO-4: Next payload: ENCR, version: 2.0
      IKEv2-PROTO-4: Exchange type: CREATE_CHILD_SA, 
         flags: RESPONDER MSG-RESPONSE     
      IKEv2-PROTO-4: Message id: 0x6, length: 172
      ENCR Next payload: SA, reserved: 0x0, 
         length: 144
    Encrypted data: 140 bytes

    ASA1에서 응답을 보냅니다.

    IKEv2-PLAT-4: SENT PKT 
         [CREATE_CHILD_SA]     
         [10.0.0.1]:500->
         [10.0.0.2]:500 
         InitSPI=0xfd366326e1fed6fe 
         RespSPI=0xa75b9b2582aaecb7 
       MID=00000006

    ASA2가 패킷을 수신합니다.

    IKEv2-PLAT-4: 
         RECV PKT [CREATE_CHILD_SA]     
         [10.0.0.1]:500->
         [10.0.0.2]:500 
         InitSPI=0xfd366326e1fed6fe 
         RespSPI=0xa75b9b2582aaecb7 
         MID=00000006
      
      IKEv2-PROTO-3: Rx 
         [L 10.0.0.2:500/R 
         10.0.0.1:500/VRF i0:f0] 
       m_id: 0x6

    이제 ASA2에서 패킷을 확인합니다.

    IKEv2-PROTO-3: HDR[i:FD366326E1FED6FE - 
         r: A75B9B2582AAECB7]
      IKEv2-PROTO-4: IKEV2 HDR ispi: FD366326E1FED6FE - 
         rspi: A75B9B2582AAECB7
      IKEv2-PROTO-4: Next payload: ENCR, version: 2.0
      IKEv2-PROTO-4: Exchange type: CREATE_CHILD_SA, 
         flags: RESPONDER MSG-RESPONSE
      IKEv2-PROTO-4: Message id: 0x6, length: 172
      
      REAL Decrypted packet:Data: 116 bytes
      SA Next payload: N, reserved: 0x0, length: 44
      IKEv2-PROTO-4: last proposal: 0x0, reserved: 0x0, 
         length: 40 Proposal: 1, Protocol id: ESP, SPI size: 4, 
         #trans: 3
      IKEv2-PROTO-4: last transform: 0x3, reserved: 0x0: 
         length: 12 type: 1, reserved: 0x0, id: AES-CBC
      IKEv2-PROTO-4: last transform: 0x3, reserved: 0x0: 
         length: 8 type: 3, reserved: 0x0, id: SHA96
      IKEv2-PROTO-4: last transform: 0x0, 
         reserved: 0x0: length: 8 type: 5, reserved: 0x0, id:
      
      N Next payload: TSi, reserved: 0x0, 
         length: 24
      
      b7 6a c6 75 53 55 99 5a df ee 05 18 
         1a 27 a6 cb
      01 56 22 ad
      TSi Next payload: TSr, reserved: 0x0, 
         length: 24
      Num of TSs: 1, reserved 0x0, reserved 0x0
      TS type: TS_IPV4_ADDR_RANGE, proto id: 0, 
         length: 16
      start port: 0, end port: 65535
      start addr: 192.168.2.99, 
         end addr: 192.168.2.99
      TSr Next payload: NONE, reserved: 0x0, 
         length: 24
      Num of TSs: 1, reserved 0x0, reserved 0x0
      TS type: TS_IPV4_ADDR_RANGE, proto id: 0, 
         length: 16
      start port: 0, end port: 65535
      start addr: 192.168.1.12, 
         end addr: 192.168.1.12
      
      Decrypted packet:Data: 172 bytes
      IKEv2-PROTO-5: (225): SM Trace-> 
         SA: I_SPI=FD366326E1FED6FE R_SPI=A75B9B2582AAECB7 (I) 
         MsgID = 00000006 CurState: 
         CHILD_I_WAIT Event: EV_RECV_CREATE_CHILD
      IKEv2-PROTO-5: (225): Action: Action_Null
      IKEv2-PROTO-5: (225): SM Trace-> SA: I_SPI=FD366326E1FED6FE 
         R_SPI=A75B9B2582AAECB7 (I) MsgID = 00000006 
         CurState: CHILD_I_PROC Event: EV_CHK4_NOTIFY
      IKEv2-PROTO-2: (225): Processing any notify-messages 
         in child SA exchange
      IKEv2-PROTO-5: (225): SM Trace-> 
         SA: I_SPI=FD366326E1FED6FE R_SPI=A75B9B2582AAECB7 (I) 
         MsgID = 00000006 CurState: CHILD_I_PROC 
         Event: EV_VERIFY_MSG
      IKEv2-PROTO-3: (225): Validating create child message
      IKEv2-PROTO-5: (225): SM Trace-> 
         SA: I_SPI=FD366326E1FED6FE R_SPI=A75B9B2582AAECB7 (I) 
         MsgID = 00000006 CurState: CHILD_I_PROC 
         Event: EV_PROC_MSG
      IKEv2-PROTO-2: (225): Processing child SA exchange
      IKEv2-PROTO-5: (225): SM Trace-> 
         SA: I_SPI=FD366326E1FED6FE R_SPI=A75B9B2582AAECB7 (
         I) MsgID = 00000006 CurState: CHILD_I_PROC 
         Event: EV_CHK4_PFS
      IKEv2-PROTO-3: (225): Checking for PFS configuration
      IKEv2-PROTO-5: (225): SM Trace-> SA: 
         I_SPI=FD366326E1FED6FE R_SPI=A75B9B2582AAECB7 (I) 
         MsgID = 00000006 CurState: CHILD_I_PROC 
         Event: EV_CHK_IKE_REKEY
      IKEv2-PROTO-3: (225): Checking if IKE SA rekey
      IKEv2-PROTO-5: (225): SM Trace-> SA: 
         I_SPI=FD366326E1FED6FE R_SPI=A75B9B2582AAECB7 (I) 
         MsgID = 00000006 CurState: CHILD_I_PROC 
         Event: EV_GEN_LOAD_IPSEC
      IKEv2-PROTO-3: (225): Load IPSEC key material
      IKEv2-PLAT-3: PROXY MATCH on crypto map outside_map seq 1
      IKEv2-PLAT-3: (225) DPD Max Time will be: 10
    IKEv2-PLAT-3: (225) DPD Max Time will be: 10

    ASA1은 이 하위 SA 항목을 SAD에 삽입합니다.

    IKEv2-PROTO-5: (225): 
         SM Trace-> 
         SA: I_SPI=FD366326E1FED6FE 
         R_SPI=A75B9B2582AAECB7 (R) 
         MsgID = 00000006 
         CurState: CHILD_R_DONE 
         Event: EV_OK
      
      IKEv2-PROTO-2: (225): 
         SA created; inserting 
         SA into database
      
      IKEv2-PROTO-5: (225): 
         SM Trace-> 
         SA: I_SPI=FD366326E1FED6FE 
         R_SPI=A75B9B2582AAECB7 (R) 
         MsgID = 00000006 CurState: 
         CHILD_R_DONE 
       Event: EV_START_DEL_NEG_TMR

    ASA2는 이 하위 SA 항목을 SAD에 삽입합니다.

    IKEv2-PROTO-5: (225): 
         SM Trace-> 
         SA: I_SPI=FD366326E1FED6FE 
         R_SPI=A75B9B2582AAECB7 (I) 
         MsgID = 00000006 
         CurState: CHILD_I_DONE 
         Event: EV_OK
      
      IKEv2-PROTO-2: (225): 
         SA created; 
       inserting SA into database

    터널 확인

    ISAKMP(Internet Security Association and Key Management Protocol) 및 IPSec 터널 컨피그레이션을 확인하려면 이 섹션에 제공된 정보를 사용합니다.

    ISAKMP

    ISAKMP를 확인하려면 다음 명령을 입력합니다.

    show crypto isakmp sa det

    ASA1

    ASA1의 출력은 다음과 같습니다.

    ASA1(config)#show cry isa sa det
    There are no IKEv1 SAs

    IKEv2 SAs:Session-id:99220, Status:UP-ACTIVE, IKE count:1, CHILD count:2

    Tunnel-id Local Remote Status Role
    1889403559 10.0.0.1/500 10.0.0.2/500 READY RESPONDER

    Encr: 3DES, Hash: MD596, DH Grp:2, Auth sign: PSK, Auth verify: PSK
    Life/Active Time: 86400/195 sec
    Session-id: 99220
    Status Description: Negotiation done
    Local spi: A75B9B2582AAECB7 Remote spi: FD366326E1FED6FE
    Local id: 10.0.0.1
    Remote id: 10.0.0.2
    Local req mess id: 14 Remote req mess id: 16
    Local next mess id: 14 Remote next mess id: 16
    Local req queued: 14 Remote req queued: 16
    Local window: 1 Remote window: 1
    DPD configured for 10 seconds, retry 2
    NAT-T is not detected
    Child sa: local selector 192.168.1.12/0 - 192.168.1.12/65535
    remote selector 192.168.2.99/0 - 192.168.2.99/65535
    ESP spi in/out: 0x8564387d/0x8717a5a
    AH spi in/out: 0x0/0x0
    CPI in/out: 0x0/0x0
    Encr: AES-CBC, keysize: 256, esp_hmac: SHA96
    ah_hmac: None, comp: IPCOMP_NONE, mode tunnel
    Child sa: local selector 192.168.1.1/0 - 192.168.1.1/65535
    remote selector 192.168.2.99/0 - 192.168.2.99/65535
    ESP spi in/out: 0x74756292/0xf0d97b2a
    AH spi in/out: 0x0/0x0
    CPI in/out: 0x0/0x0
    Encr: AES-CBC, keysize: 256, esp_hmac: SHA96
    ah_hmac: _NONE,, comp: IPCOMP_NONE, mode tunnel

    ASA2

    ASA2의 출력은 다음과 같습니다.

    ASA2(config)#show cry isa sa det
    
  
    There are no IKEv1 SAs

    IKEv2 SAs:

    Session-id:99220, Status:UP-ACTIVE, IKE count:1, CHILD count:2

    Tunnel-id                Local               Remote    Status        Role
    472237395         10.0.0.2/500         10.0.0.1/500     READY   INITIATOR
          Encr: 3DES, Hash: MD596, DH Grp:2, Auth sign: PSK, Auth verify: PSK
          Life/Active Time: 86400/190 sec
          Session-id: 99220
          Status Description: Negotiation done
          Local spi: FD366326E1FED6FE       Remote spi: A75B9B2582AAECB7
          Local id: 10.0.0.2
          Remote id: 10.0.0.1
          Local req mess id: 16             Remote req mess id: 13
          Local next mess id: 16            Remote next mess id: 13
          Local req queued: 16              Remote req queued: 13
          Local window: 1                   Remote window: 1
          DPD configured for 10 seconds, retry 2
          NAT-T is not detected  
    Child sa: local selector  192.168.2.99/0 - 192.168.2.99/65535
              remote selector 192.168.1.12/0 - 192.168.1.12/65535
              ESP spi in/out: 0x8717a5a/0x8564387d  
              AH spi in/out: 0x0/0x0  
              CPI in/out: 0x0/0x0  
              Encr: AES-CBC, keysize: 256, esp_hmac: SHA96
              ah_hmac: None, comp: IPCOMP_NONE, mode tunnel
    Child sa: local selector  192.168.2.99/0 - 192.168.2.99/65535
              remote selector 192.168.1.1/0 - 192.168.1.1/65535
              ESP spi in/out: 0xf0d97b2a/0x74756292  
              AH spi in/out: 0x0/0x0  
              CPI in/out: 0x0/0x0  
              Encr: AES-CBC, keysize: 256, esp_hmac: SHA96
              ah_hmac: None, comp: IPCOMP_NONE, mode tunnel

    IPSec

    IPSec을 확인하려면 다음 명령을 입력합니다.

    show crypto ipsec sa

    ASA1

    ASA1의 출력은 다음과 같습니다.

    ASA1(config)#show cry ipsec sa
    
  interface: outside
        Crypto map tag: outside_map, seq num: 1, local addr: 10.0.0.1

          access-list l2l_list extended permit ip host 192.168.1.1 
            host 192.168.2.99
           local ident (addr/mask/prot/port): 
              (192.168.1.1/255.255.255.255/0/0)
           remote ident (addr/mask/prot/port): (
              192.168.2.99/255.255.255.255/0/0)
           current_peer: 10.0.0.2

           #pkts encaps: 3, #pkts encrypt: 3, #pkts digest: 3
           #pkts decaps: 3, #pkts decrypt: 3, #pkts verify: 3
           #pkts compressed: 0, #pkts decompressed: 0
           #pkts not compressed: 3, #pkts comp failed: 0, 
              #pkts decomp failed: 0
           #pre-frag successes: 0, #pre-frag failures: 0, 
              #fragments created: 0
           #PMTUs sent: 0, #PMTUs rcvd: 0, 
              #decapsulated frgs needing reassembly: 0
           #send errors: 0, #recv errors: 0

           local crypto endpt.: 10.0.0.1/500, remote crypto endpt.: 
              10.0.0.2/500
           path mtu 1500, ipsec overhead 74, media mtu 1500
           current outbound spi: F0D97B2A
           current inbound spi : 74756292

         inbound esp sas:
           spi: 0x74756292 (1953850002)
              transform: esp-aes-256 esp-sha-hmac no compression
              in use settings ={L2L, Tunnel, }
              slot: 0, conn_id: 137990144, crypto-map: outside_map
              sa timing: remaining key lifetime (kB/sec): (4008959/28628)
              IV size: 16 bytes
              replay detection support: Y
              Anti replay bitmap:
               0x00000000 0x0000000F
        outbound esp sas:
          spi: 0xF0D97B2A (4040784682)
             transform: esp-aes-256 esp-sha-hmac no compression
             in use settings ={L2L, Tunnel, }
             slot: 0, conn_id: 137990144, crypto-map: outside_map
             sa timing: remaining key lifetime (kB/sec): (4147199/28628)
             IV size: 16 bytes
             replay detection support: Y
             Anti replay bitmap:
               0x00000000 0x00000001

        Crypto map tag: outside_map, seq num: 1, local addr: 10.0.0.1

          access-list l2l_list extended permit ip host 192.168.1.12 
            host 192.168.2.99
          local ident (addr/mask/prot/port): (
            192.168.1.12/255.255.255.255/0/0)
          remote ident (addr/mask/prot/port): 
            (192.168.2.99/255.255.255.255/0/0)
          current_peer: 10.0.0.2
          #pkts encaps: 3, #pkts encrypt: 3, #pkts digest: 3
          #pkts decaps: 3, #pkts decrypt: 3, #pkts verify: 3
          #pkts compressed: 0, #pkts decompressed: 0
          #pkts not compressed: 3, #pkts comp failed: 0, 
            #pkts decomp failed: 0
          #pre-frag successes: 0, #pre-frag failures: 0, 
            #fragments created: 0
          #PMTUs sent: 0, #PMTUs rcvd: 0, #decapsulated frgs needing 
            reassembly: 0
          #send errors: 0, #recv errors: 0

          local crypto endpt.: 10.0.0.1/500, remote crypto 
            endpt.: 10.0.0.2/500
          path mtu 1500, ipsec overhead 74, media mtu 1500
          current outbound spi: 08717A5A
          current inbound spi : 8564387D

        inbound esp sas:
          spi: 0x8564387D (2237937789)
             transform: esp-aes-256 esp-sha-hmac no compression
             in use settings ={L2L, Tunnel, }
             slot: 0, conn_id: 137990144, crypto-map: outside_map
             sa timing: remaining key lifetime (kB/sec): (4285439/28734)
             IV size: 16 bytes
             replay detection support: Y
             Anti replay bitmap:
              0x00000000 0x0000000F
        outbound esp sas:
          spi: 0x08717A5A (141654618)
             transform: esp-aes-256 esp-sha-hmac no compression
             in use settings ={L2L, Tunnel, }
             slot: 0, conn_id: 137990144, crypto-map: outside_map
             sa timing: remaining key lifetime (kB/sec): (4055039/28734)
             IV size: 16 bytes
             replay detection support: Y
         Anti replay bitmap:
             0x00000000 0x00000001

    ASA2

    ASA2의 출력은 다음과 같습니다.

    ASA2(config)#show cry ipsec sa
    
  interface: outside
        Crypto map tag: outside_map, seq num: 1, local addr: 10.0.0.2

          access-list l2l_list extended permit ip host 192.168.2.99 host 
            192.168.1.12
          local ident (addr/mask/prot/port): 
            (192.168.2.99/255.255.255.255/0/0)
          remote ident (addr/mask/prot/port): 
            (192.168.1.12/255.255.255.255/0/0)
          current_peer: 10.0.0.1

          #pkts encaps: 3, #pkts encrypt: 3, #pkts digest: 3
          #pkts decaps: 3, #pkts decrypt: 3, #pkts verify: 3
          #pkts compressed: 0, #pkts decompressed: 0
          #pkts not compressed: 3, #pkts comp failed: 0, 
            #pkts decomp failed: 0
          #pre-frag successes: 0, #pre-frag failures: 0, 
            #fragments created: 0
          #PMTUs sent: 0, #PMTUs rcvd: 0, #decapsulated frgs needing 
            reassembly: 0
          #send errors: 0, #recv errors: 0

          local crypto endpt.: 10.0.0.2/500, remote crypto 
            endpt.: 10.0.0.1/500
          path mtu 1500, ipsec overhead 74, media mtu 1500
          current outbound spi: 8564387D
          current inbound spi : 08717A5A

        inbound esp sas:
          spi: 0x08717A5A (141654618)
             transform: esp-aes-256 esp-sha-hmac no compression
             in use settings ={L2L, Tunnel, }
             slot: 0, conn_id: 137973760, crypto-map: outside_map
             sa timing: remaining key lifetime (kB/sec): (4193279/28770)
             IV size: 16 bytes         replay detection support: Y
             Anti replay bitmap:
              0x00000000 0x0000000F
        outbound esp sas:
          spi: 0x8564387D (2237937789)
             transform: esp-aes-256 esp-sha-hmac no compression
             in use settings ={L2L, Tunnel, }
             slot: 0, conn_id: 137973760, crypto-map: outside_map
             sa timing: remaining key lifetime (kB/sec): (4055039/28770)
             IV size: 16 bytes         replay detection support: Y
             Anti replay bitmap:
              0x00000000 0x00000001

       Crypto map tag: outside_map, seq num: 1, local addr: 10.0.0.2

         access-list l2l_list extended permit ip host 192.168.2.99 
           host 192.168.1.1
         local ident (addr/mask/prot/port): (
           192.168.2.99/255.255.255.255/0/0)
         remote ident (addr/mask/prot/port): 
           (192.168.1.1/255.255.255.255/0/0)
         current_peer: 10.0.0.1
         #pkts encaps: 3, #pkts encrypt: 3, #pkts digest: 3
         #pkts decaps: 3, #pkts decrypt: 3, #pkts verify: 3
         #pkts compressed: 0, #pkts decompressed: 0
         #pkts not compressed: 3, #pkts comp failed: 0, 
           #pkts decomp failed: 0
         #pre-frag successes: 0, #pre-frag failures: 0, 
           #fragments created: 0
         #PMTUs sent: 0, #PMTUs rcvd: 0, #decapsulated frgs needing 
           reassembly: 0
         #send errors: 0, #recv errors: 0

         local crypto endpt.: 10.0.0.2/500, remote crypto 
           endpt.: 10.0.0.1/500
         path mtu 1500, ipsec overhead 74, media mtu 1500
         current outbound spi: 74756292
         current inbound spi : F0D97B2A

       inbound esp sas:
         spi: 0xF0D97B2A (4040784682)
            transform: esp-aes-256 esp-sha-hmac no compression
            in use settings ={L2L, Tunnel, }
            slot: 0, conn_id: 137973760, crypto-map: outside_map
            sa timing: remaining key lifetime (kB/sec): (4285439/28663)
            IV size: 16 bytes
            replay detection support: Y
            Anti replay bitmap:
             0x00000000 0x0000000F
       outbound esp sas:
         spi: 0x74756292 (1953850002)
            transform: esp-aes-256 esp-sha-hmac no compression
            in use settings ={L2L, Tunnel, }
            slot: 0, conn_id: 137973760, crypto-map: outside_map
            sa timing: remaining key lifetime (kB/sec): (4331519/28663)
            IV size: 16 bytes
            replay detection support: Y
            Anti replay bitmap:
             0x00000000 0x00000001

    show crypto isakmp sa 명령의 출력과 동일한 출력을 제공하는 show crypto ikev2 sa 명령의 출력도 확인할 수 있습니다.

    IKEv2 SAs:

    Session-id:99220, Status:UP-ACTIVE, IKE count:1, CHILD count:2

    Tunnel-id                Local               Remote   Status        Role
    1889403559         10.0.0.1/500         10.0.0.2/500    READY   RESPONDER
          Encr: 3DES, Hash: MD596, DH Grp:2, Auth sign: PSK, Auth verify: PSK
          Life/Active Time: 86400/179 sec
    Child sa: local selector  192.168.1.12/0 - 192.168.1.12/65535
              remote selector 192.168.2.99/0 - 192.168.2.99/65535
              ESP spi in/out: 0x8564387d/0x8717a5a
    Child sa: local selector  192.168.1.1/0 - 192.168.1.1/65535
              remote selector 192.168.2.99/0 - 192.168.2.99/65535
              ESP spi in/out: 0x74756292/0xf0d97b2a

    관련 정보

    개정 이력

    개정 게시 날짜 의견
    3.0
    04-Apr-2024
    재인증.
    1.0
    28-Jan-2013
    최초 릴리스
    TAC Authored

    Cisco 엔지니어가 작성

    • 아누 엠 차코
      리더 기술 마케팅

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