IOS IPSec- en IKE-implementaties - IKEv1 hoofdmodus voor probleemoplossing

Inleiding

Dit document bevat informatie om inzicht te krijgen in de softwareoplossingen van Cisco IOS wanneer de hoofdmodus en de voorgedeelde toets (PSK) worden gebruikt.

Dit document bevat ook informatie over de manier waarop u bepaalde bug-lijnen in een configuratie kunt vertalen.

Deze onderwerpen worden niet besproken:

• Passagiersverkeer na de invoering van de tunnel
• Basisconcepten van IPSec of Internet Key Exchange (IKE)

kernvraagstuk

IKE en IPSec debugs hebben de neiging cryptisch te worden. Cisco Technical Assistance Center (TAC) gebruikt deze insecten vaak om te begrijpen waar een probleem met de vestiging van de IPSec VPN-tunnel zich bevindt.

Scenario

De hoofdmodus wordt doorgaans gebruikt tussen LAN-to-LAN tunnels, of in het geval van externe toegang (ezvpn) wanneer certificaten worden gebruikt voor verificatie.

Deze apparaten komen van een Cisco IOS apparaat dat de 15.2(1)T softwarerelease in werking stelt.

In dit document worden twee hoofdscenario's beschreven:

• IOS-initiëringszijde
• IOS-responder

In dit document wordt een op VTI gebaseerde tunnel tussen twee locaties opgezet, gebaseerd op IPv6.

Opmerkingen:

Gebruik het Opdrachtupgereedschap (alleen geregistreerde klanten) om meer informatie te verkrijgen over de opdrachten die in dit document worden gebruikt.

Raadpleeg Important Information on Debug Commands (Belangrijke informatie over opdrachten met debug) voordat u opdrachten met debug opgeeft.

Gebruikte debugs

• debug van crypto isakmp
• crypto ipsec debug
• debug crypto kmi

IOS-routerconfiguratie

Configuratie van versleuteling

crypto isakmp policy 10
authentication pre-share

crypto isakmp key cisco address ipv6 ::/0

crypto ipsec transform-set TRA esp-aes esp-sha-hmac
mode transport

crypto ipsec profile PRO
set transform-set TRA

interface Tunnel23
ip address 192.168.23.2 255.255.255.0
ipv6 address FE80::23:2 link-local
tunnel source Ethernet0/0
tunnel mode ipsec ipv6
tunnel destination 2001: DB8::3
tunnel protection ipsec profile PRO

Andere kant

crypto isakmp policy 10
authentication pre-share

crypto isakmp key cisco address ipv6 ::/0

crypto ipsec transform-set TRA esp-aes esp-sha-hmac
mode transport

crypto ipsec profile PRO
set transform-set TRA

interface Tunnel23
ip address 192.168.23.3 255.255.255.0
ipv6 address FE80::23:3 link-local
tunnel source Ethernet0/0
tunnel mode ipsec ipv6
tunnel destination 2001: DB8::2
tunnel protection ipsec profile PRO

Ontbreken

IOS-respons

Hoofdmode Bericht 1 (M1)

Het oorspronkelijke voorstel voor IKE omvat:

• Versleuteling
• Hashing
• Diffie-Hellman (DH) groep
• levensduur

*Sep 21 08:33:43.377: ISAKMP (0) : received packet from 2001: DB8::2 dport 500 
   sport 500 Global (N) NEW SA
*Sep 21 08:33:43.377: ISAKMP: Created a peer struct for 2001: DB8::2, peer port
   500
*Sep 21 08:33:43.377: ISAKMP: New peer created peer = 0x8E45588 
   peer_handle = 0x8000000A
*Sep 21 08:33:43.377: ISAKMP: Locking peer struct 0x8E45588, refcount 1 for 
   crypto_isakmp_process_block
*Sep 21 08:33:43.377: ISAKMP: local port 500, remote port 500
*Sep 21 08:33:43.377: ISAKMP: (0):insert sa successfully sa = 6D12A00
*Sep 21 08:33:43.377: ISAKMP: (0):Input = IKE_MESG_FROM_PEER, IKE_MM_EXCH
*Sep 21 08:33:43.377: ISAKMP: (0): Old State = IKE_READY  New State = IKE_R_MM1
*Sep 21 08:33:43.377: ISAKMP: (0): processing SA payload. message ID = 0
*Sep 21 08:33:43.377: ISAKMP: (0):found peer pre-shared key matching 2001: 
   DB8::2
*Sep 21 08:33:43.377: ISAKMP: (0): local preshared key found
*Sep 21 08:33:43.377: ISAKMP: Scanning profiles for xauth ...
*Sep 21 08:33:43.377: ISAKMP: (0):Checking ISAKMP transform 1 against priority 
   10 policy
*Sep 21 08:33:43.377: ISAKMP:      encryption DES-CBC
*Sep 21 08:33:43.377: ISAKMP:      hash SHA
*Sep 21 08:33:43.377: ISAKMP:      default group 1
*Sep 21 08:33:43.377: ISAKMP:      auth pre-share
*Sep 21 08:33:43.377: ISAKMP:      life type in seconds
*Sep 21 08:33:43.377: ISAKMP:      life duration (VPI) of  0x0 0x1 0x51 0x80
*Sep 21 08:33:43.377: ISAKMP: (0):atts are acceptable. Next payload is 0
*Sep 21 08:33:43.377: ISAKMP: (0):Acceptable atts:actual life: 0
*Sep 21 08:33:43.377: ISAKMP: (0):Acceptable atts:life: 0
*Sep 21 08:33:43.377: ISAKMP: (0):Fill atts in sa vpi_length:4
*Sep 21 08:33:43.377: ISAKMP: (0):Fill atts in sa life_in_seconds:86400
*Sep 21 08:33:43.377: ISAKMP: (0):Returning Actual lifetime: 86400
*Sep 21 08:33:43.377: ISAKMP: (0):: Started lifetime timer: 86400.

*Sep 21 08:33:43.377: ISAKMP: (0):Input = IKE_MESG_INTERNAL, 
   IKE_PROCESS_MAIN_MODE
*Sep 21 08:33:43.377: ISAKMP: (0): Old State = IKE_R_MM1  New State = IKE_R_MM1

Gerelateerde configuratie:

crypto isakmp policy 10
authentication pre-share

Hoofdmodembericht 2 (MM2) - ons antwoord verzenden

*Sep 21 08:33:43.377: ISAKMP: (0): sending packet to 2001: DB8::2 my_port 500 
   peer_port 500 (R) MM_SA_SETUP
*Sep 21 08:33:43.377: ISAKMP: (0): Sending an IKE IPv6 Packet.
*Sep 21 08:33:43.377: ISAKMP: (0):Input = IKE_MESG_INTERNAL, 
   IKE_PROCESS_COMPLETE
*Sep 21 08:33:43.377: ISAKMP: (0): Old State = IKE_R_MM1  New State = IKE_R_MM2

Hoofdmodus Bericht 3 (MM3)

Omvat:

• Detectie van netwerkadresomzetting (NAT)
• DH-uitwisselingsdeel één

*Sep 21 08:33:43.381: ISAKMP (0): received packet from 2001:DB8::2 dport 500 
   sport 500 Global (R) MM_SA_SETUP
*Sep 21 08:33:43.381: ISAKMP: (0):Input = IKE_MESG_FROM_PEER, IKE_MM_EXCH
*Sep 21 08:33:43.381: ISAKMP: (0): Old State = IKE_R_MM2  New State = IKE_R_MM3
*Sep 21 08:33:43.381: ISAKMP: (0): processing KE payload. message ID = 0
*Sep 21 08:33:43.393: ISAKMP: (0): processing NONCE payload. message ID = 0
*Sep 21 08:33:43.393: ISAKMP: (0):found peer pre-shared key matching 2001: 
   DB8::2
*Sep 21 08:33:43.393: ISAKMP: (1011): processing vendor id payload
*Sep 21 08:33:43.393: ISAKMP: (1011): vendor ID is DPD
*Sep 21 08:33:43.393: ISAKMP: (1011): processing vendor id payload
*Sep 21 08:33:43.393: ISAKMP: (1011): speaking to another IOS box!
*Sep 21 08:33:43.393: ISAKMP: (1011): processing vendor id payload
*Sep 21 08:33:43.393: ISAKMP: (1011): vendor ID seems Unity/DPD but major 0 
   mismatch
*Sep 21 08:33:43.393: ISAKMP: (1011): vendor ID is XAUTH
*Sep 21 08:33:43.393: ISAKMP: (1011):Input = IKE_MESG_INTERNAL, 
   IKE_PROCESS_MAIN_MODE
*Sep 21 08:33:43.393: ISAKMP: (1011): Old State = IKE_R_MM3  New State = 
   IKE_R_MM3

Hoofdmode bericht 4 (M4)

Omvat:

• NAT-detectielading
• Voortzetting van de DH-uitwisseling

*Sep 21 08:33:43.405: ISAKMP: (1011): sending packet to 2001: DB8::2 my_port 
   500 peer_port 500 (R) MM_KEY_EXCH
*Sep 21 08:33:43.405: ISAKMP: (1011): Sending an IKE IPv6 Packet.
*Sep 21 08:33:43.405: ISAKMP: (1011):Input = IKE_MESG_INTERNAL, 
   IKE_PROCESS_COMPLETE
*Sep 21 08:33:43.405: ISAKMP: (1011): Old State = IKE_R_MM3  New State = 
   IKE_R_MM4

Voornaamste modus Bericht 5 (MM5) - Initiator stuurt zijn identiteit door

Omvat:

• Lokale identiteitsinformatie
• Sleutel

*Sep 21 08:33:43.425: ISAKMP (1011): received packet from 2001: DB8::2 dport 
   500 sport 500 Global (R) MM_KEY_EXCH
*Sep 21 08:33:43.425: ISAKMP: (1011):Input = IKE_MESG_FROM_PEER, IKE_MM_EXCH
*Sep 21 08:33:43.425: ISAKMP: (1011): Old State = IKE_R_MM4  New State = 
   IKE_R_MM5

*Sep 21 08:33:43.425: ISAKMP: (1011): processing ID payload. message ID = 0
*Sep 21 08:33:43.425: ISAKMP (1011): ID payload
        next-payload : 8
        type         : 5
        address      : 2001: DB8::2
        protocol     : 17
        port         : 500
        length       : 24
*Sep 21 08:33:43.425: ISAKMP: (0):: peer matches *none* of the profiles
*Sep 21 08:33:43.425: ISAKMP: (1011): processing HASH payload. message ID = 0
*Sep 21 08:33:43.425: ISAKMP: (1011): processing NOTIFY INITIAL_CONTACT 
   protocol 1 spi 0, message ID = 0, sa = 0x6D12A00
*Sep 21 08:33:43.425: ISAKMP: (1011): SA authentication status: authenticated
*Sep 21 08:33:43.425: ISAKMP: (1011): SA has been authenticated with 2001: 
   DB8::2
*Sep 21 08:33:43.425: ISAKMP: (1011): SA authentication status: authenticated
*Sep 21 08:33:43.425: ISAKMP: (1011): Process initial contact, bring down 
   existing phase 1 and 2 SA's with local 2001: DB8::3 remote 2001: DB8::2 
   remote port 500
*Sep 21 08:33:43.425: ISAKMP: Trying to insert a peer 2001: DB8::3/2001: 
   DB8::2/500/,  and inserted successfully 8E45588.
*Sep 21 08:33:43.425: ISAKMP: (1011):Input = IKE_MESG_INTERNAL, 
   IKE_PROCESS_MAIN_MODE
*Sep 21 08:33:43.425: ISAKMP: (1011): Old State = IKE_R_MM5  New State = 
   IKE_R_MM5

Hoofdmodembericht 6 (MM6) - Responder stuurt zijn identiteit door. Fase 1 Voltooiing.

Omvat:

• Externe identiteit verzonden vanuit peer
• Eindbeslissing betreffende tunnelgroep om te kiezen

*Sep 21 08:33:43.425: IPSEC(key_engine): got a queue event with 1 KMI message(s)
*Sep 21 08:33:43.425: ISAKMP: (1011): SA is doing pre-shared key authentication
   using id type ID_IPV6_ADDR
*Sep 21 08:33:43.425: ISAKMP (1011): ID payload
        next-payload : 8
        type         : 5
        address      : 2001: DB8::3
        protocol     : 17
        port         : 500
        length       : 24
*Sep 21 08:33:43.425: ISAKMP: (1011):Total payload length: 24
*Sep 21 08:33:43.425: ISAKMP: (1011): sending packet to 2001: DB8::2 my_port 
   500 peer_port 500 (R) MM_KEY_EXCH
*Sep 21 08:33:43.425: ISAKMP: (1011): Sending an IKE IPv6 Packet.
*Sep 21 08:33:43.425: ISAKMP: (1011):Input = IKE_MESG_INTERNAL, 
   IKE_PROCESS_COMPLETE
*Sep 21 08:33:43.425: ISAKMP: (1011): Old State = IKE_R_MM5  New State = 
   IKE_P1_COMPLETE

Gerelateerde configuratie:

crypto isakmp identity ...

Snelmodus bericht 1 (QM1)

*Sep 21 08:33:43.433: ISAKMP (1011): received packet from 2001: DB8::2 dport 
   500 sport 500 Global (R) QM_IDLE
*Sep 21 08:33:43.433: ISAKMP: set new node 1371333358 to QM_IDLE
*Sep 21 08:33:43.433: ISAKMP: (1011): processing HASH payload. message ID = 
   1371333358
*Sep 21 08:33:43.433: ISAKMP: (1011): processing SA payload. message ID = 
   1371333358
*Sep 21 08:33:43.433: ISAKMP: (1011):Checking IPSec proposal 1
*Sep 21 08:33:43.433: ISAKMP: transform 1, ESP_AES
*Sep 21 08:33:43.433: ISAKMP:   attributes in transform:
*Sep 21 08:33:43.433: ISAKMP:      encaps is 1 (Tunnel)
*Sep 21 08:33:43.433: ISAKMP:      SA life type in seconds
*Sep 21 08:33:43.433: ISAKMP:      SA life duration (basic) of 3600
*Sep 21 08:33:43.433: ISAKMP:      SA life type in kilobytes
*Sep 21 08:33:43.433: ISAKMP:      SA life duration (VPI) of  0x0 0x46 0x50 0x0
*Sep 21 08:33:43.433: ISAKMP:      authenticator is HMAC-SHA
*Sep 21 08:33:43.433: ISAKMP:      key length is 128
*Sep 21 08:33:43.433: ISAKMP: (1011):atts are acceptable.
*Sep 21 08:33:43.433: IPSEC(validate_proposal_request): proposal part #1
*Sep 21 08:33:43.433: IPSEC(validate_proposal_request): proposal part #1,
  (key eng. msg.) INBOUND local= 2001: DB8::3:0, remote= 2001: DB8::2:0,
    local_proxy= ::/0/256/0,
    remote_proxy= ::/0/256/0,
    protocol= ESP, transform= NONE  (Tunnel),
    lifedur= 0s and 0kb,
    spi= 0x0(0), conn_id= 0, keysize= 128, flags= 0x0
*Sep 21 08:33:43.433: ISAKMP: (1011): processing NONCE payload. message ID = 
   1371333358
*Sep 21 08:33:43.433: ISAKMP: (1011): processing ID payload. message ID = 
   1371333358
*Sep 21 08:33:43.433: ISAKMP: (1011): processing ID payload. message ID = 
   1371333358
*Sep 21 08:33:43.433: ISAKMP: (1011):QM Responder gets spi
*Sep 21 08:33:43.433: ISAKMP: (1011):Node 1371333358, Input = 
   IKE_MESG_FROM_PEER, IKE_QM_EXCH
*Sep 21 08:33:43.433: ISAKMP: (1011): Old State = IKE_QM_READY  New State = 
   IKE_QM_SPI_STARVE

Relevante configuratie:

tunnel mode ipsec ipv6

Snelmodus bericht 2 (QM2)

Omvat:

• Afstandsbediening verstuurt parameters
• De kortere van de twee voorgestelde fase 2-levensduur wordt gekozen

*Sep 21 08:33:43.433: ISAKMP: (1011): sending packet to 2001: DB8::2 my_port 
   500 peer_port 500 (R) QM_IDLE
*Sep 21 08:33:43.433: ISAKMP: (1011): Sending an IKE IPv6 Packet.
*Sep 21 08:33:43.433: ISAKMP: (1011):Node 1371333358, Input = 
   IKE_MESG_INTERNAL, IKE_GOT_SPI
*Sep 21 08:33:43.433: ISAKMP: (1011): Old State = IKE_QM_SPI_STARVE  New 
   State = IKE_QM_R_QM2
*Sep 21 08:33:43.437: IPSEC(key_engine): got a queue event with 1 KMI message(s)
R3(config-if)#
*Sep 21 08:33:43.437: IPSEC(crypto_ipsec_create_ipsec_sas): Map found 
   Tunnel23-head-0
*Sep 21 08:33:43.437: IPSEC(crypto_ipsec_sa_find_ident_head): reconnecting 
   with the same proxies and peer 2001: DB8::2
*Sep 21 08:33:43.437: IPSEC(create_sa): sa created,
  (sa) sa_dest= 2001: DB8::3, sa_proto= 50,
    sa_spi= 0x221A7153(572158291),
    sa_trans= esp-aes esp-sha-hmac , sa_conn_id= 305
    sa_lifetime(k/sec)= (4608000/3532)
*Sep 21 08:33:43.437: IPSEC(create_sa): sa created,
  (sa) sa_dest= 2001: DB8::2, sa_proto= 50,
    sa_spi= 0x45F16A9A(1173449370),
    sa_trans= esp-aes esp-sha-hmac , sa_conn_id= 306
    sa_lifetime(k/sec)= (4608000/3532)

Relevante configuratie:

crypto ipsec transform-set TRA esp-aes esp-sha-hmac
mode transport
crypto ipsec profile PRO
set transform-set TRA
interface tunnel23
tunnel mode ipsec ipv6
tunnel protection ipsec profile PRO

Snelmodus bericht 3 (QM3) - fase twee moet worden voltooid en tunnelinterface omhoog

*Sep 21 08:33:43.437: %LINEPROTO-5-UPDOWN: Line protocol on Interface Tunnel23,
   changed state to up
*Sep 21 08:33:43.437: ISAKMP (1011): received packet from 2001: DB8::2 dport 
   500 sport 500 Global (R) QM_IDLE
*Sep 21 08:33:43.437: ISAKMP: (1011): deleting node 1371333358 error FALSE 
   reason "QM done (await)"
*Sep 21 08:33:43.437: ISAKMP: (1011):Node 1371333358, Input = 
   IKE_MESG_FROM_PEER, IKE_QM_EXCH
*Sep 21 08:33:43.437: ISAKMP: (1011): Old State = IKE_QM_R_QM2  New State = 
   IKE_QM_PHASE2_COMPLETE
*Sep 21 08:33:43.437: IPSEC(key_engine): got a queue event with 1 KMI message(s
*Sep 21 08:33:43.437: IPSEC(key_engine_enable_outbound): rec'd enable notify 
   from ISAKMP

IOS-router - Initiator

Voornaamste modus Bericht 1 (MM1) - Eerste contactgegevens

Omvat:

• Verkopers-ID’s (VID’s)
• Capaciteiten
• Voorstellen van fase 1
• IKE Security Association (SA)
• IPSec maakt al een sjabloon voor SAs

*Sep 21 08:33:43.245: %CRYPTO-6-ISAKMP_ON_OFF: ISAKMP is ON
*Sep 21 08:33:43.245: IPSEC(sa ident sadb root initialize created IPv6 ACL %s) 
   : Tunnel23-head-0-65537-Tunnel23-head-0-ACL-6-IPSECV6-ACL
*Sep 21 08:33:43.245: IPSEC(recalculate_mtu) : reset sadb_root 79E82A8 mtu to 
   1500
*Sep 21 08:33:43.245: IPSEC(adjust_mtu) : adjusting ident ip mtu from 1460 to 
   1500,
  (identity) local= 2001: DB8::2:0, remote= 2001: DB8::3:0,
    local_proxy= ::/0/256/0,
    remote_proxy= ::/0/256/0
*Sep 21 08:33:43.245: IPSEC(adjust_mtu): adjusting path mtu from 1460 to 1500,
  (identity) local= 2001: DB8::2:0, remote= 2001: DB8::3:0,
    local_proxy= ::/0/256/0,
    remote_proxy= ::/0/256/0
*Sep 21 08:33:43.245: IPSEC(sa_request): ,
  (key eng. msg.) OUTBOUND local= 2001: DB8::2:500, remote= 2001: DB8::3:500,
    local_proxy= ::/0/256/0,
    remote_proxy= ::/0/256/0,
    protocol= ESP, transform= esp-aes esp-sha-hmac  (Tunnel),
    lifedur= 3600s and 4608000kb,
    spi= 0x0(0), conn_id= 0, keysize= 128, flags= 0x0
*Sep 21 08:33:43.245: ISAKMP: (0): SA request profile is (NULL)
*Sep 21 08:33:43.245: ISAKMP: Created a peer struct for 2001: DB8::3, peer port
   500
*Sep 21 08:33:43.245: ISAKMP: New peer created peer = 0x9344BE8 peer_handle = 
   0x80000008
*Sep 21 08:33:43.245: ISAKMP: Locking peer struct 0x9344BE8, refcount 1 for 
   isakmp_initiator
*Sep 21 08:33:43.245: ISAKMP: local port 500, remote port 500
*Sep 21 08:33:43.245: ISAKMP: set new node 0 to QM_IDLE
*Sep 21 08:33:43.245: ISAKMP: (0):insert sa successfully sa = 944C840
*Sep 21 08:33:43.245: ISAKMP: (0):Can not start Aggressive mode, trying Main 
   mode.
*Sep 21 08:33:43.245: ISAKMP: (0):found peer pre-shared key matching 2001: 
   DB8::3
*Sep 21 08:33:43.245: ISAKMP: (0):Input = IKE_MESG_FROM_IPSEC, IKE_SA_REQ_MM
*Sep 21 08:33:43.245: ISAKMP: (0): Old State = IKE_READY  New State = IKE_I_MM1
*Sep 21 08:33:43.245: ISAKMP: (0): beginning Main Mode exchange
*Sep 21 08:33:43.245: ISAKMP: (0): sending packet to 2001: DB8::3 my_port 500 
   peer_port 500 (I) MM_NO_STATE
*Sep 21 08:33:43.245: ISAKMP: (0): Sending an IKE IPv6 Packet.

Relevante configuratie:

crypto isakmp policy 10
authentication pre-share

Hoofdmodembericht 2 (MM2) - Reactie op eerste contact

Omvat:

• Peer kiest voor het beleid van Internet Security Association en Key Management Protocol (ISAKMP)
• IKE SA

*Sep 21 08:33:43.249: ISAKMP (0): received packet from 2001: DB8::3 dport 500 
   sport 500 Global (I) MM_NO_STATE
*Sep 21 08:33:43.249: ISAKMP: (0):Input = IKE_MESG_FROM_PEER, IKE_MM_EXCH
*Sep 21 08:33:43.249: ISAKMP: (0): Old State = IKE_I_MM1  New State = IKE_I_MM2

*Sep 21 08:33:43.249: ISAKMP: (0): processing SA payload. message ID = 0
*Sep 21 08:33:43.249: ISAKMP: (0):found peer pre-shared key matching 2001: 
   DB8::3
*Sep 21 08:33:43.249: ISAKMP: (0): local preshared key found
*Sep 21 08:33:43.249: ISAKMP : Scanning profiles for xauth ...
*Sep 21 08:33:43.249: ISAKMP: (0):Checking ISAKMP transform 1 against priority 
   10 policy
*Sep 21 08:33:43.249: ISAKMP:      encryption DES-CBC
*Sep 21 08:33:43.249: ISAKMP:      hash SHA
*Sep 21 08:33:43.249: ISAKMP:      default group 1
*Sep 21 08:33:43.249: ISAKMP:      auth pre-share
*Sep 21 08:33:43.249: ISAKMP:      life type in seconds
*Sep 21 08:33:43.249: ISAKMP:      life duration (VPI) of  0x0 0x1 0x51 0x80
*Sep 21 08:33:43.249: ISAKMP: (0):atts are acceptable. Next payload is 0
*Sep 21 08:33:43.249: ISAKMP: (0):Acceptable atts:actual life: 0
*Sep 21 08:33:43.249: ISAKMP: (0):Acceptable atts:life: 0
*Sep 21 08:33:43.249: ISAKMP: (0):Fill atts in sa vpi_length:4
*Sep 21 08:33:43.249: ISAKMP: (0):Fill atts in sa life_in_seconds:86400
*Sep 21 08:33:43.249: ISAKMP: (0):Returning Actual lifetime: 86400
*Sep 21 08:33:43.249: ISAKMP: (0):: Started lifetime timer: 86400.

*Sep 21 08:33:43.249: ISAKMP: (0):Input = IKE_MESG_INTERNAL, 
   IKE_PROCESS_MAIN_MODE
*Sep 21 08:33:43.249: ISAKMP: (0): Old State = IKE_I_MM2  New State = 
   IKE_I_MM2

Main Mode Message 3 (MM3) - NAT Discovery en Diffie-Hellman exchange

Omvat:

• NAT ontdekking lading en hash
• Initiatie van de DH-beurs
• DPD-ondersteuning (Dead Peer Detection)

*Sep 21 08:33:43.249: ISAKMP: (0): sending packet to 2001: DB8::3 my_port 500 
   peer_port 500 (I) MM_SA_SETUP
*Sep 21 08:33:43.249: ISAKMP: (0): Sending an IKE IPv6 Packet.
*Sep 21 08:33:43.249: ISAKMP: (0):Input = IKE_MESG_INTERNAL, 
   IKE_PROCESS_COMPLETE
*Sep 21 08:33:43.249: ISAKMP: (0): Old State = IKE_I_MM2  New State = IKE_I_MM3

Hoofdmode Bericht 4 (M4) - NAT Discovery en Diffie-Hellman exchange

Omvat:

• NAT-zoeklading
• Initiatie van de DH-beurs
• Aanvullende VID’s (DPD, Unity-ondersteuning)
• Kennis van praten met een ander IOS-apparaat

*Sep 21 08:33:43.273: ISAKMP (0): received packet from 2001: DB8::3 dport 500 
   sport 500 Global (I) MM_SA_SETUP
*Sep 21 08:33:43.273: ISAKMP: (0):Input = IKE_MESG_FROM_PEER, IKE_MM_EXCH
*Sep 21 08:33:43.273: ISAKMP: (0): Old State = IKE_I_MM3  New State = IKE_I_MM4

*Sep 21 08:33:43.273: ISAKMP: (0): processing KE payload. message ID = 0
*Sep 21 08:33:43.281: ISAKMP: (0): processing NONCE payload. message ID = 0
*Sep 21 08:33:43.281: ISAKMP: (0):found peer pre-shared key matching 2001: 
   DB8::3
*Sep 21 08:33:43.281: ISAKMP: (1011): processing vendor id payload
*Sep 21 08:33:43.281: ISAKMP: (1011): vendor ID is Unity
*Sep 21 08:33:43.281: ISAKMP: (1011): processing vendor id payload
*Sep 21 08:33:43.281: ISAKMP: (1011): vendor ID is DPD
*Sep 21 08:33:43.281: ISAKMP: (1011): processing vendor id payload
*Sep 21 08:33:43.281: ISAKMP: (1011): speaking to another IOS box!
*Sep 21 08:33:43.281: ISAKMP: (1011):Input = IKE_MESG_INTERNAL, 
   IKE_PROCESS_MAIN_MODE
*Sep 21 08:33:43.281: ISAKMP: (1011): Old State = IKE_I_MM4  New State = 
   IKE_I_MM4

Hoofdmodembericht 5 (MM5) - Verzend identiteit

Omvat:

• Externe peer-identiteit (ID)

*Sep 21 08:33:43.293: ISAKMP: (1011): Send initial contact
*Sep 21 08:33:43.293: ISAKMP: (1011): SA is doing pre-shared key authentication
   using id type ID_IPV6_ADDR
*Sep 21 08:33:43.293: ISAKMP (1011): ID payload
        next-payload : 8
        type         : 5
        address      : 2001: DB8::2
        protocol     : 17
        port         : 500
        length       : 24
*Sep 21 08:33:43.293: ISAKMP: (1011):Total payload length: 24
*Sep 21 08:33:43.293: ISAKMP: (1011): sending packet to 2001: DB8::3 my_port 
   500 peer_port 500 (I) MM_KEY_EXCH
*Sep 21 08:33:43.293: ISAKMP: (1011): Sending an IKE IPv6 Packet.
*Sep 21 08:33:43.293: ISAKMP: (1011):Input = IKE_MESG_INTERNAL, 
   IKE_PROCESS_COMPLETE
*Sep 21 08:33:43.293: ISAKMP: (1011): Old State = IKE_I_MM4  New State = 
   IKE_I_MM5

Relevante configuratie:

crypto isakmp identity ... 

Hoofdmode Bericht 6 (MM6) - Identificatie van peer op afstand, fase 1 is ingesteld

Omvat:

• Rekey Times begon
• Externe identiteit (in dit geval een adres)
• Beslissing om op een profiel te landen

*Sep 21 08:33:43.297: ISAKMP (1011): received packet from 2001: DB8::3 dport 
   500 sport 500 Global (I) MM_KEY_EXCH
*Sep 21 08:33:43.297: ISAKMP: (1011): processing ID payload. message ID = 0
*Sep 21 08:33:43.297: ISAKMP (1011): ID payload
        next-payload : 8
        type         : 5
        address      : 2001: DB8::3
        protocol     : 17
        port         : 500
        length       : 24
*Sep 21 08:33:43.297: ISAKMP: (0):: peer matches *none* of the profiles
*Sep 21 08:33:43.297: ISAKMP: (1011): processing HASH payload. message ID = 0
*Sep 21 08:33:43.297: ISAKMP: (1011): SA authentication status: authenticated
*Sep 21 08:33:43.297: ISAKMP: (1011): SA has been authenticated with 2001: 
   DB8::3
*Sep 21 08:33:43.297: ISAKMP: Trying to insert a peer 2001: DB8::2/2001: 
   DB8::3/500/,  and inserted successfully 9344BE8.
*Sep 21 08:33:43.297: ISAKMP: (1011):Input = IKE_MESG_FROM_PEER, IKE_MM_EXCH
*Sep 21 08:33:43.297: ISAKMP: (1011): Old State = IKE_I_MM5  New State = 
   IKE_I_MM6

*Sep 21 08:33:43.297: ISAKMP: (1011):Input = IKE_MESG_INTERNAL, 
   IKE_PROCESS_MAIN_MODE
*Sep 21 08:33:43.297: ISAKMP: (1011): Old State = IKE_I_MM6  New State = 
   IKE_I_MM6

*Sep 21 08:33:43.301: ISAKMP: (1011):Input = IKE_MESG_INTERNAL, 
   IKE_PROCESS_COMPLETE
*Sep 21 08:33:43.301: ISAKMP: (1011): Old State = IKE_I_MM6  New State = 
   IKE_P1_COMPLETE

Relevante configuratie:

crypto isakmp identity ... 

Quick Mode Message 1 (QM1) - Peer start fase 2

Omvat:

• Remote- en lokale proxy-ID’s
• Instellen omzetten

*Sep 21 08:33:43.301: ISAKMP: (1011):beginning Quick Mode exchange, M-ID of 
   1371333358*Sep 21 08:33:43.301: ISAKMP: (1011):QM Initiator gets spi
*Sep 21 08:33:43.301: ISAKMP: (1011): sending packet to 2001: DB8::3 my_port 
   500 peer_port 500 (I) QM_IDLE
*Sep 21 08:33:43.301: ISAKMP: (1011): Sending an IKE IPv6 Packet.
*Sep 21 08:33:43.301: ISAKMP: (1011):Node 1371333358, Input = 
   IKE_MESG_INTERNAL, IKE_INIT_QM
*Sep 21 08:33:43.301: ISAKMP: (1011): Old State = IKE_QM_READY  New State = 
   IKE_QM_I_QM1
*Sep 21 08:33:43.301: ISAKMP: (1011):Input = IKE_MESG_INTERNAL, 
   IKE_PHASE1_COMPLETE
*Sep 21 08:33:43.301: ISAKMP: (1011): Old State = IKE_P1_COMPLETE  New State = 
   IKE_P1_COMPLETE

Relevante configuratie:

crypto ipsec transform-set TRA esp-aes esp-sha-hmac
mode transport

crypto ipsec profile PRO
set transform-set TRA

Snelmodus bericht 2 (QM2)

Omvat:

• Bevestiging van de identiteit van volmacht
• Tunneltype
• Perfect Forwarding Security-instellingen (PFS)

*Sep 21 08:33:43.305: ISAKMP (1011): received packet from 2001: DB8::3 dport 
   500 sport 500 Global (I) QM_IDLE
*Sep 21 08:33:43.305: ISAKMP: (1011): processing HASH payload. message ID = 
   1371333358
*Sep 21 08:33:43.305: ISAKMP: (1011): processing SA payload. message ID = 
   1371333358
*Sep 21 08:33:43.305: ISAKMP: (1011):Checking IPSec proposal 1
*Sep 21 08:33:43.305: ISAKMP: transform 1, ESP_AES
*Sep 21 08:33:43.305: ISAKMP:   attributes in transform:
*Sep 21 08:33:43.305: ISAKMP:      encaps is 1 (Tunnel)
*Sep 21 08:33:43.305: ISAKMP:      SA life type in seconds
*Sep 21 08:33:43.305: ISAKMP:      SA life duration (basic) of 3600
*Sep 21 08:33:43.305: ISAKMP:      SA life type in kilobytes
*Sep 21 08:33:43.305: ISAKMP:      SA life duration (VPI) of  0x0 0x46 0x50 0x0
*Sep 21 08:33:43.305: ISAKMP:      authenticator is HMAC-SHA
*Sep 21 08:33:43.305: ISAKMP:      key length is 128
*Sep 21 08:33:43.305: ISAKMP: (1011):atts are acceptable.
*Sep 21 08:33:43.305: IPSEC(validate_proposal_request): proposal part #1
*Sep 21 08:33:43.305: IPSEC(validate_proposal_request): proposal part #1,
  (key eng. msg.) INBOUND local= 2001: DB8::2:0, remote= 2001: DB8::3:0,
    local_proxy= ::/0/256/0,
    remote_proxy= ::/0/256/0,
    protocol= ESP, transform= NONE  (Tunnel),
    lifedur= 0s and 0kb,
    spi= 0x0(0), conn_id= 0, keysize= 128, flags= 0x0
*Sep 21 08:33:43.305: ISAKMP: (1011): processing NONCE payload. message ID = 
   1371333358
*Sep 21 08:33:43.305: ISAKMP: (1011): processing ID payload. message ID = 
   1371333358
*Sep 21 08:33:43.305: ISAKMP: (1011): processing ID payload. message ID = 
   1371333358

Relevante configuratie:

crypto ipsec transform-set TRA esp-aes esp-sha-hmac
mode transport

crypto ipsec profile PRO
set transform-set TRA

interface tunnel23
tunnel mode ipsec ipv6
tunnel protection ipsec profile PRO

Snelmodus 3 (QM3) - fase 2 Instelling

Omvat:

• Vaststelling van beveiligingsbeleidsindexen (SPI's) om het verkeer door te geven

*Sep 21 08:33:43.305: ISAKMP: (1011): Sending an IKE IPv6 Packet.
*Sep 21 08:33:43.305: ISAKMP: (1011): deleting node 1371333358 error FALSE 
   reason "No Error"
*Sep 21 08:33:43.305: ISAKMP: (1011):Node 1371333358, Input = 
   IKE_MESG_FROM_PEER, IKE_QM_EXCH
*Sep 21 08:33:43.305: ISAKMP: (1011): Old State = IKE_QM_I_QM1  New State = 
   IKE_QM_PHASE2_COMPLETE
*Sep 21 08:33:43.305: IPSEC(key_engine): got a queue event with 1 KMI message(s)
*Sep 21 08:33:43.305: IPSEC(crypto_ipsec_create_ipsec_sas): Map found 
   Tunnel23-head-0
*Sep 21 08:33:43.305: IPSEC(crypto_ipsec_sa_find_ident_head): reconnecting 
   with the same proxies and peer 2001: DB8::3
*Sep 21 08:33:43.305: IPSEC(create_sa): sa created,
  (sa) sa_dest= 2001: DB8::2, sa_proto= 50,
    sa_spi= 0x45F16A9A(1173449370),
    sa_trans= esp-aes esp-sha-hmac , sa_conn_id= 305
    sa_lifetime(k/sec)= (4608000/3439)
*Sep 21 08:33:43.305: IPSEC(create_sa): sa created,
  (sa) sa_dest= 2001: DB8::3, sa_proto= 50,
    sa_spi= 0x221A7153(572158291),
    sa_trans= esp-aes esp-sha-hmac , sa_conn_id= 306
    sa_lifetime(k/sec)= (4608000/3439)
R2(config-if)#
*Sep 21 08:33:43.309: %LINEPROTO-5-UPDOWN: Line protocol on Interface 
   Tunnel23, changed state to up

Tunnelverificatie

sh crypto ipsec sa

interface: Tunnel23
    Crypto map tag: Tunnel23-head-0, local addr 2001: DB8::2

   protected vrf: (none)
   local  ident (addr/mask/prot/port): (::/0/0/0)
   remote ident (addr/mask/prot/port): (::/0/0/0)
   current_peer 2001: DB8::3 port 500
     PERMIT, flags={origin_is_acl,}
    #pkts encaps: 4, #pkts encrypt: 4, #pkts digest: 4
    #pkts decaps: 4, #pkts decrypt: 4, #pkts verify: 4
    #pkts compressed: 0, #pkts decompressed: 0
    #pkts not compressed: 0, #pkts compr. failed: 0
    #pkts not decompressed: 0, #pkts decompress failed: 0
    #send errors 0, #recv errors 0

     local crypto endpt.: 2001: DB8::2,
     remote crypto endpt.: 2001: DB8::3
     path mtu 1500, ipv6 mtu 1500, ipv6 mtu idb Ethernet0/0
     current outbound spi: 0x221A7153(572158291)
     PFS (Y/N): N, DH group: none

     inbound esp sas:
      spi: 0x45F16A9A(1173449370)
        transform: esp-aes esp-sha-hmac ,
        in use settings ={Tunnel, }
        conn id: 305, flow_id: SW:305, sibling_flags 80000041, crypto map: 
           Tunnel23-head-0
        sa timing: remaining key lifetime (k/sec): (4183789/3408)
        IV size: 16 bytes
        replay detection support: Y
        Status: ACTIVE

     inbound ah sas:

     inbound pcp sas:

     outbound esp sas:
      spi: 0x221A7153(572158291)
        transform: esp-aes esp-sha-hmac ,
        in use settings ={Tunnel, }
        conn id: 306, flow_id: SW:306, sibling_flags 80000041, crypto map: 
           Tunnel23-head-0
        sa timing: remaining key lifetime (k/sec): (4183790/3408)
        IV size: 16 bytes
        replay detection support: Y
        Status: ACTIVE

R2(config-if)#do ping fe80::23:3
Output Interface: tunnel23
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to FE80::23:3, timeout is 2 seconds:
Packet sent with a source address of FE80::23:2%Tunnel23
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 8/11/20 ms
R2(config-if)#do sh crypto ipsec sa | i caps|ident
   local  ident (addr/mask/prot/port): (::/0/0/0)
   remote ident (addr/mask/prot/port): (::/0/0/0)
    #pkts encaps: 9, #pkts encrypt: 9, #pkts digest: 9
    #pkts decaps: 9, #pkts decrypt: 9, #pkts verify: 9

Tunnel is omhoog en door het verkeer.

Gerelateerde informatie

• Wikipedia-artikel over IPSec  ; de norm en de referenties bevatten veel nuttige informatie .
• ASA IPsec- en IKE-debugs (IKEv1 Aggressive Mode) voor probleemoplossing Technische opmerking
• ASA IPsec- en IKE-debugs (IKEv1 hoofdmodus) voor probleemoplossing bij technische opmerking
• Technische ondersteuning en documentatie – Cisco Systems