중복 시나리오로 ASA VPN 구성

소개

이 문서에서는 중복 시나리오에서 두 ASA(Adaptive Security Appliance) 간의 LAN-to-LAN(L2L) IPsec 터널을 통해 이동하는 VPN 트래픽과 인터넷 트래픽의 PAT(Port Address Translation)를 변환하는 데 사용되는 단계를 설명합니다.

사전 요구 사항

요구 사항

이 컨피그레이션 예를 진행하기 전에 Cisco ASA를 인터페이스에 IP 주소로 구성하고 기본 연결이 되어 있는지 확인하십시오.

사용되는 구성 요소

이 문서의 정보는 다음 소프트웨어 버전을 기반으로 합니다.

• Cisco Adaptive Security Appliance Software 버전 8.3 이상

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.

배경 정보

각 디바이스에는 보호 대상 프라이빗 네트워크가 있습니다. 중복 시나리오에서는 트래픽이 동일한 서브넷의 IP 주소로 전송되기 때문에 패킷이 로컬 서브넷을 벗어나지 않으므로 VPN을 통한 통신이 발생하지 않습니다. 다음 섹션에서 설명한 대로 NAT(Network Address Translation)를 사용하여 이 작업을 수행할 수 있습니다.

두 VPN 엔드포인트 모두에서 변환 

VPN 보호 네트워크가 중복되고 두 엔드포인트에서 컨피그레이션을 수정할 수 있는 경우 NAT는 원격 변환된 서브넷으로 이동할 때 로컬 네트워크를 다른 서브넷으로 변환하는 데 사용할 수 있습니다.

ASA 1

사용 중인 서브넷에 필요한 개체를 만듭니다.

object network LOCAL
 subnet 192.168.1.0 255.255.255.0
object network XLATED-LOCAL
 subnet 192.168.2.0 255.255.255.0
object network XLATED-REMOTE
 subnet 192.168.3.0 255.255.255.0

NAT 문 구성

원격 서브넷으로 이동할 때만 로컬 네트워크를 다른 서브넷으로 변환하는 수동 명령문을 만듭니다(변환됨).

nat (inside,outside) source static LOCAL XLATED-LOCAL destination static XLATED-REMOTE XLATED-REMOTE

변환된 서브넷으로 암호화 ACL 구성

access-list VPN-TRAFFIC extended permit ip object XLATED-LOCAL object XLATED-REMOTE Rele

관련 암호화 컨피그레이션

crypto ikev1 enable outside
crypto ikev1 policy 1
 authentication pre-share
 encryption aes-256
 hash sha
 group 2
 lifetime 86400

crypto ipsec ikev1 transform-set AES256-SHA esp-aes-256 esp-sha-hmac 
crypto ipsec security-association pmtu-aging infinite
crypto map MYMAP 10 match address VPN-TRAFFIC
crypto map MYMAP 10 set peer 172.16.2.1 
crypto map MYMAP 10 set ikev1 transform-set AES256-SHA
crypto map MYMAP interface outside

tunnel-group 172.16.2.1 type ipsec-l2l
tunnel-group 172.16.2.1 ipsec-attributes
 ikev1 pre-shared-key secure_PSK

ASA 2

사용 중인 서브넷에 필요한 개체를 만듭니다.

object network LOCAL
 subnet 192.168.1.0 255.255.255.0
object network XLATED-LOCAL
 subnet 192.168.3.0 255.255.255.0
object network XLATED-REMOTE
 subnet 192.168.2.0 255.255.255.0

NAT 문 구성

원격 서브넷으로 이동할 때만 로컬 네트워크를 다른 서브넷으로 변환하는 수동 명령문을 만듭니다(변환됨).

nat (inside,outside) source static LOCAL XLATED-LOCAL destination static XLATED-REMOTE XLATED-REMOTE

변환된 서브넷으로 암호화 ACL 구성

access-list VPN-TRAFFIC extended permit ip object XLATED-LOCAL object XLATED-REMOTE Rele

관련 암호화 컨피그레이션

crypto ikev1 enable outside
crypto ikev1 policy 1
 authentication pre-share
 encryption aes-256
 hash sha
 group 2
 lifetime 86400

crypto ipsec ikev1 transform-set AES256-SHA esp-aes-256 esp-sha-hmac 
crypto ipsec security-association pmtu-aging infinite
crypto map MYMAP 10 match address VPN-TRAFFIC
crypto map MYMAP 10 set peer 172.16.1.1 
crypto map MYMAP 10 set ikev1 transform-set AES256-SHA
crypto map MYMAP interface outside

tunnel-group 172.16.1.1 type ipsec-l2l
tunnel-group 172.16.1.1 ipsec-attributes
 ikev1 pre-shared-key secure_PSK

다음을 확인합니다.

설정이 올바르게 작동하는지 확인하려면 이 섹션을 활용하십시오.

ASA 1

ASA1(config)# sh cry isa sa

IKEv1 SAs:

   Active SA: 1
    Rekey SA: 0 (A tunnel will report 1 Active and 1 Rekey SA during rekey)
Total IKE SA: 1

1   IKE Peer: 172.16.2.1
    Type    : L2L             Role    : initiator 
    Rekey   : no              State   : MM_ACTIVE 

There are no IKEv2 SAs

ASA1(config)# show crypto ipsec sa
interface: outside
    Crypto map tag: MYMAP, seq num: 10, local addr: 172.16.1.1

      access-list VPN-TRAFFIC extended permit ip 192.168.2.0 255.255.255.0 192.168.3.0 255.255.255.0 
      local ident (addr/mask/prot/port): (192.168.2.0/255.255.255.0/0/0)
      remote ident (addr/mask/prot/port): (192.168.3.0/255.255.255.0/0/0)
      current_peer: 172.16.2.1


      #pkts encaps: 9, #pkts encrypt: 9, #pkts digest: 9
      #pkts decaps: 9, #pkts decrypt: 9, #pkts verify: 9
      #pkts compressed: 0, #pkts decompressed: 0
      #pkts not compressed: 9, #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
      #TFC rcvd: 0, #TFC sent: 0
      #Valid ICMP Errors rcvd: 0, #Invalid ICMP Errors rcvd: 0
      #send errors: 0, #recv errors: 0

      local crypto endpt.: 172.16.1.1/0, remote crypto endpt.: 172.16.2.1/0
      path mtu 1500, ipsec overhead 74(44), media mtu 1500
      PMTU time remaining (sec): 0, DF policy: copy-df
      ICMP error validation: disabled, TFC packets: disabled
      current outbound spi: F90C149A
      current inbound spi : 6CE656C7

    inbound esp sas:
      spi: 0x6CE656C7 (1827034823)
         transform: esp-aes-256 esp-sha-hmac no compression 
         in use settings ={L2L, Tunnel, IKEv1, }
         slot: 0, conn_id: 16384, crypto-map: MYMAP
         sa timing: remaining key lifetime (kB/sec): (3914999/28768)
         IV size: 16 bytes
         replay detection support: Y
         Anti replay bitmap: 
          0x00000000 0x000003FF
    outbound esp sas:
      spi: 0xF90C149A (4178318490)
         transform: esp-aes-256 esp-sha-hmac no compression 
         in use settings ={L2L, Tunnel, IKEv1, }
         slot: 0, conn_id: 16384, crypto-map: MYMAP
         sa timing: remaining key lifetime (kB/sec): (3914999/28768)
         IV size: 16 bytes
         replay detection support: Y
         Anti replay bitmap: 
          0x00000000 0x00000001

ASA 2

ASA2(config)# show crypto isa sa 

IKEv1 SAs:

   Active SA: 1
    Rekey SA: 0 (A tunnel will report 1 Active and 1 Rekey SA during rekey)
Total IKE SA: 1

1   IKE Peer: 172.16.1.1
    Type    : L2L             Role    : responder 
    Rekey   : no              State   : MM_ACTIVE 

There are no IKEv2 SAs

ASA2(config)# show crypto ipsec sa 
interface: outside
    Crypto map tag: MYMAP, seq num: 10, local addr: 172.16.2.1

      access-list VPN-TRAFFIC extended permit ip 192.168.3.0 255.255.255.0 192.168.2.0 255.255.255.0 
      local ident (addr/mask/prot/port): (192.168.3.0/255.255.255.0/0/0)
      remote ident (addr/mask/prot/port): (192.168.2.0/255.255.255.0/0/0)
      current_peer: 172.16.1.1


      #pkts encaps: 9, #pkts encrypt: 9, #pkts digest: 9
      #pkts decaps: 9, #pkts decrypt: 9, #pkts verify: 9
      #pkts compressed: 0, #pkts decompressed: 0
      #pkts not compressed: 9, #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
      #TFC rcvd: 0, #TFC sent: 0
      #Valid ICMP Errors rcvd: 0, #Invalid ICMP Errors rcvd: 0
      #send errors: 0, #recv errors: 0

      local crypto endpt.: 172.16.2.1/0, remote crypto endpt.: 172.16.1.1/0
      path mtu 1500, ipsec overhead 74(44), media mtu 1500
      PMTU time remaining (sec): 0, DF policy: copy-df
      ICMP error validation: disabled, TFC packets: disabled
      current outbound spi: 6CE656C7
      current inbound spi : F90C149A

    inbound esp sas:
      spi: 0xF90C149A (4178318490)
         transform: esp-aes-256 esp-sha-hmac no compression 
         in use settings ={L2L, Tunnel, IKEv1, }
         slot: 0, conn_id: 12288, crypto-map: MYMAP
         sa timing: remaining key lifetime (kB/sec): (4373999/28684)
         IV size: 16 bytes
         replay detection support: Y
         Anti replay bitmap: 
          0x00000000 0x000003FF
    outbound esp sas:
      spi: 0x6CE656C7 (1827034823)
         transform: esp-aes-256 esp-sha-hmac no compression 
         in use settings ={L2L, Tunnel, IKEv1, }
         slot: 0, conn_id: 12288, crypto-map: MYMAP
         sa timing: remaining key lifetime (kB/sec): (4373999/28683)
         IV size: 16 bytes
         replay detection support: Y
         Anti replay bitmap: 
          0x00000000 0x00000001
 

겹치는 스포크가 있는 허브 및 스포크 토폴로지

다음 토폴로지에서는 두 스포크의 서브넷이 동일하며, 이는 허브로 향하는 IPsec 터널을 통해 보호되어야 합니다. 스포크의 관리를 용이하게 하기 위해 NAT 컨피그레이션을 활성화하여 중첩 문제를 해결할 수 있는 작업은 허브에서만 수행됩니다. 

ASA1

사용 중인 서브넷에 필요한 개체를 만듭니다.

object network LOCAL
 subnet 10.10.10.0 255.255.255.0
object network SPOKES-NETWORK
 subnet 192.168.2.0 255.255.255.0
object network LOCAL-XLATE-TO-SPOKE1
 subnet 10.20.20.0 255.255.255.0
object network LOCAL-XLATE-TO-SPOKE2
 subnet 10.30.30.0 255.255.255.0
object network REMOTE-XLATE-SPOKE1
 subnet 192.168.3.0 255.255.255.0
object network REMOTE-XLATE-SPOKE2
 subnet 192.168.4.0 255.255.255.0

번역할 수동 명령문 만들기:

• SPOKE1(192.168.2.0 /24)로 이동할 때 로컬 네트워크 10.10.10.0 /24에서 10.20.20.0 /24로 이동합니다.
• 10.20.20.0 /24로 전환되는 경우 SPOKE1 네트워크 192.168.2.0 /24에서 192.168.3.0 /24로 전환됩니다.
• SPOKE3(192.168.2.0 /24)로 이동할 때 로컬 네트워크 10.10.10.0 /24에서 10.30.30.0 /24로 이동합니다.
• 10.30.30.0 /24로 전환되는 경우 SPOKE2 네트워크 192.168.2.0 /24에서 192.168.4.0 /24로 전환됩니다.

nat (inside,outside) source static LOCAL LOCAL-XLATE-SPOKE1 destination static REMOTE-XLATE-SPOKE1 SPOKES-NETWORK
nat (inside,outside) source static LOCAL LOCAL-XLATE-SPOKE2 destination static REMOTE-XLATE-SPOKE2 SPOKES-NETWORK

변환된 서브넷으로 암호화 ACL 구성

access-list VPN-to-SPOKE1 extended permit ip object LOCAL-XLATE-SPOKE1 object SPOKES-NETWORKS
access-list VPN-to-SPOKE2 extended permit ip object LOCAL-XLATE-SPOKE2 object SPOKES-NETWORKS

관련 암호화 컨피그레이션

crypto ikev1 enable outside
crypto ikev1 policy 1
 authentication pre-share
 encryption aes-256
 hash sha
 group 2
 lifetime 86400

crypto ipsec ikev1 transform-set AES256-SHA esp-aes-256 esp-sha-hmac 
crypto ipsec security-association pmtu-aging infinite
crypto map MYMAP 10 match address VPN-to-SPOKE1
crypto map MYMAP 10 set peer 172.16.2.1 
crypto map MYMAP 10 set ikev1 transform-set AES256-SHA
crypto map MYMAP 20 match address VPN-to-SPOKE2
crypto map MYMAP 20 set peer 172.16.3.1 
crypto map MYMAP 20 set ikev1 transform-set AES256-SHA
crypto map MYMAP interface outside

tunnel-group 172.16.2.1 type ipsec-l2l
tunnel-group 172.16.2.1 ipsec-attributes
 ikev1 pre-shared-key secure_PSK
tunnel-group 172.16.3.1 type ipsec-l2l
tunnel-group 172.16.3.1 ipsec-attributes
 ikev1 pre-shared-key secure_PSK

ASA2(SPOKE1)

변환된 서브넷으로 가는 암호화 ACL을 구성합니다(10.20.20.0 /24).

access-list VPN-TRAFFIC extended permit ip 192.168.2.0 255.255.255.0 10.20.20.0 255.255.255.0 

관련 암호화 컨피그레이션

crypto ikev1 enable outside
crypto ikev1 policy 1
 authentication pre-share
 encryption aes-256
 hash sha
 group 2
 lifetime 86400

crypto ipsec ikev1 transform-set esp-aes-256 esp-sha-hmac 
crypto ipsec security-association pmtu-aging infinite
crypto map MYMAP 10 match address VPN-TRAFFIC
crypto map MYMAP 10 set peer 172.16.1.1 
crypto map MYMAP 10 set ikev1 transform-set AES256-SHA
crypto map MYMAP interface outside

tunnel-group 172.16.1.1 type ipsec-l2l
tunnel-group 172.16.1.1 ipsec-attributes
 ikev1 pre-shared-key secure_PSK

R1(SPOKE2)

변환된 서브넷으로 가는 암호화 ACL을 구성합니다(10.30.30.0 /24).

ip access-list extended VPN-TRAFFIC
 permit ip 192.168.2.0 0.0.0.255 10.30.30.0 0.0.0.255

관련 암호화 컨피그레이션

crypto isakmp policy 1
 encr aes 256
 authentication pre-share
 group 2  

crypto isakmp key secure_PSK address 172.16.1.1     
      
crypto ipsec transform-set AES256-SHA esp-aes 256 esp-sha-hmac 
 mode tunnel

crypto map MYMAP 10 ipsec-isakmp 
 set peer 172.16.1.1
 set transform-set AES256-SHA 
 match address VPN-TRAFFIC

interface GigabitEthernet0/1
 ip address 172.16.3.1 255.255.255.0
 duplex auto
 speed auto
 media-type rj45
 crypto map MYMAP

다음을 확인합니다.

ASA 1

ASA1(config)# show crypto isakmp sa 

IKEv1 SAs:

   Active SA: 2
    Rekey SA: 0 (A tunnel will report 1 Active and 1 Rekey SA during rekey)
Total IKE SA: 2

1   IKE Peer: 172.16.3.1
    Type    : L2L             Role    : responder 
    Rekey   : no              State   : MM_ACTIVE 
2   IKE Peer: 172.16.2.1
    Type    : L2L             Role    : responder 
    Rekey   : no              State   : MM_ACTIVE 

There are no IKEv2 SAs

ASA1(config)# show crypto ipsec sa
interface: outside
    Crypto map tag: MYMAP, seq num: 10, local addr: 172.16.1.1

      access-list VPN-to-SPOKE1 extended permit ip 10.20.20.0 255.255.255.0 192.168.2.0 255.255.255.0 
      local ident (addr/mask/prot/port): (10.20.20.0/255.255.255.0/0/0)
      remote ident (addr/mask/prot/port): (192.168.2.0/255.255.255.0/0/0)
      current_peer: 172.16.2.1


      #pkts encaps: 10, #pkts encrypt: 9, #pkts digest: 10
      #pkts decaps: 10, #pkts decrypt: 9, #pkts verify: 10
      #pkts compressed: 0, #pkts decompressed: 0
      #pkts not compressed: 9, #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
      #TFC rcvd: 0, #TFC sent: 0
      #Valid ICMP Errors rcvd: 0, #Invalid ICMP Errors rcvd: 0
      #send errors: 0, #recv errors: 0

      local crypto endpt.: 172.16.1.1/0, remote crypto endpt.: 172.16.2.1/0
      path mtu 1500, ipsec overhead 74(44), media mtu 1500
      PMTU time remaining (sec): 0, DF policy: copy-df
      ICMP error validation: disabled, TFC packets: disabled
      current outbound spi: 79384296
      current inbound spi : 2189BF7A

    inbound esp sas:
      spi: 0x2189BF7A (562675578)
         transform: esp-aes-256 esp-sha-hmac no compression 
         in use settings ={L2L, Tunnel, IKEv1, }
         slot: 0, conn_id: 12288, crypto-map: MYMAP
         sa timing: remaining key lifetime (kB/sec): (3914999/28618)
         IV size: 16 bytes
         replay detection support: Y
         Anti replay bitmap: 
          0x00000000 0x000003FF
    outbound esp sas:
      spi: 0x79384296 (2033730198)
         transform: esp-aes-256 esp-sha-hmac no compression 
         in use settings ={L2L, Tunnel, IKEv1, }
         slot: 0, conn_id: 12288, crypto-map: MYMAP
         sa timing: remaining key lifetime (kB/sec): (3914999/28618)
         IV size: 16 bytes
         replay detection support: Y
         Anti replay bitmap: 
          0x00000000 0x00000001

    Crypto map tag: MYMAP, seq num: 20, local addr: 172.16.1.1

      access-list VPN-to-SPOKE2 extended permit ip 10.30.30.0 255.255.255.0 192.168.2.0 255.255.255.0 
      local ident (addr/mask/prot/port): (10.30.30.0/255.255.255.0/0/0)
      remote ident (addr/mask/prot/port): (192.168.2.0/255.255.255.0/0/0)
      current_peer: 172.16.3.1


      #pkts encaps: 10, #pkts encrypt: 10, #pkts digest: 10
      #pkts decaps: 10, #pkts decrypt: 10, #pkts verify: 10
      #pkts compressed: 0, #pkts decompressed: 0
      #pkts not compressed: 4, #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
      #TFC rcvd: 0, #TFC sent: 0
      #Valid ICMP Errors rcvd: 0, #Invalid ICMP Errors rcvd: 0
      #send errors: 0, #recv errors: 0

      local crypto endpt.: 172.16.1.1/0, remote crypto endpt.: 172.16.3.1/0
      path mtu 1500, ipsec overhead 74(44), media mtu 1500
      PMTU time remaining (sec): 0, DF policy: copy-df
      ICMP error validation: disabled, TFC packets: disabled
      current outbound spi: 65FDF4F5
      current inbound spi : 05B7155D

    inbound esp sas:
      spi: 0x05B7155D (95884637)
         transform: esp-aes-256 esp-sha-hmac no compression 
         in use settings ={L2L, Tunnel, IKEv1, }
         slot: 0, conn_id: 8192, crypto-map: MYMAP
         sa timing: remaining key lifetime (kB/sec): (3914999/2883)
         IV size: 16 bytes
         replay detection support: Y
         Anti replay bitmap: 
          0x00000000 0x0000001F
    outbound esp sas:
      spi: 0x65FDF4F5 (1711142133)
         transform: esp-aes-256 esp-sha-hmac no compression 
         in use settings ={L2L, Tunnel, IKEv1, }
         slot: 0, conn_id: 8192, crypto-map: MYMAP
         sa timing: remaining key lifetime (kB/sec): (3914999/2883)
         IV size: 16 bytes
         replay detection support: Y
         Anti replay bitmap: 
          0x00000000 0x00000001              

ASA2(SPOKE1)

ASA2(config)# show crypto isakmp sa 

IKEv1 SAs:

   Active SA: 1
    Rekey SA: 0 (A tunnel will report 1 Active and 1 Rekey SA during rekey)
Total IKE SA: 1

1   IKE Peer: 172.16.1.1
    Type    : L2L             Role    : initiator 
    Rekey   : no              State   : MM_ACTIVE 

There are no IKEv2 SAs

ASA2(config)# show crypto ipsec sa
interface: outside
    Crypto map tag: MYMAP, seq num: 10, local addr: 172.16.2.1

      access-list VPN-TRAFFIC extended permit ip 192.168.2.0 255.255.255.0 10.20.20.0 255.255.255.0 
      local ident (addr/mask/prot/port): (192.168.2.0/255.255.255.0/0/0)
      remote ident (addr/mask/prot/port): (10.20.20.0/255.255.255.0/0/0)
      current_peer: 172.16.1.1


      #pkts encaps: 10, #pkts encrypt: 10, #pkts digest: 10
      #pkts decaps: 10, #pkts decrypt: 10, #pkts verify: 10
      #pkts compressed: 0, #pkts decompressed: 0
      #pkts not compressed: 9, #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
      #TFC rcvd: 0, #TFC sent: 0
      #Valid ICMP Errors rcvd: 0, #Invalid ICMP Errors rcvd: 0
      #send errors: 0, #recv errors: 0

      local crypto endpt.: 172.16.2.1/0, remote crypto endpt.: 172.16.1.1/0
      path mtu 1500, ipsec overhead 74(44), media mtu 1500
      PMTU time remaining (sec): 0, DF policy: copy-df
      ICMP error validation: disabled, TFC packets: disabled
      current outbound spi: 2189BF7A
      current inbound spi : 79384296

    inbound esp sas:
      spi: 0x79384296 (2033730198)
         transform: esp-aes-256 esp-sha-hmac no compression 
         in use settings ={L2L, Tunnel, IKEv1, }
         slot: 0, conn_id: 8192, crypto-map: MYMAP
         sa timing: remaining key lifetime (kB/sec): (4373999/28494)
         IV size: 16 bytes
         replay detection support: Y
         Anti replay bitmap: 
          0x00000000 0x000003FF
    outbound esp sas:
      spi: 0x2189BF7A (562675578)
         transform: esp-aes-256 esp-sha-hmac no compression 
         in use settings ={L2L, Tunnel, IKEv1, }
         slot: 0, conn_id: 8192, crypto-map: MYMAP
         sa timing: remaining key lifetime (kB/sec): (4373999/28494)
         IV size: 16 bytes
         replay detection support: Y
         Anti replay bitmap: 
          0x00000000 0x00000001

R1(SPOKE2)

R31show crypto isakmp sa
IPv4 Crypto ISAKMP SA
dst             src             state          conn-id status
172.16.1.1      172.16.3.1      QM_IDLE           1001 ACTIVE

IPv6 Crypto ISAKMP SA

R1#show crypto ipsec sa

interface: GigabitEthernet0/1
    Crypto map tag: MYMAP, local addr 172.16.3.1

   protected vrf: (none)
   local  ident (addr/mask/prot/port): (192.168.2.0/255.255.255.0/0/0)
   remote ident (addr/mask/prot/port): (10.30.30.0/255.255.255.0/0/0)
   current_peer 172.16.1.1 port 500
     PERMIT, flags={origin_is_acl,}
    #pkts encaps: 10, #pkts encrypt: 10, #pkts digest: 10
    #pkts decaps: 10, #pkts decrypt: 10, #pkts verify: 10
    #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.: 172.16.3.1, remote crypto endpt.: 172.16.1.1
     plaintext mtu 1438, path mtu 1500, ip mtu 1500, ip mtu idb GigabitEthernet0/1
     current outbound spi: 0x5B7155D(95884637)
     PFS (Y/N): N, DH group: none

     inbound esp sas:
      spi: 0x65FDF4F5(1711142133)
        transform: esp-256-aes esp-sha-hmac ,
        in use settings ={Tunnel, }
        conn id: 1, flow_id: SW:1, sibling_flags 80004040, crypto map: MYMAP
        sa timing: remaining key lifetime (k/sec): (4188495/2652)
        IV size: 16 bytes
        replay detection support: Y
        Status: ACTIVE(ACTIVE)

     inbound ah sas:

     inbound pcp sas:

     outbound esp sas:
      spi: 0x5B7155D(95884637)
        transform: esp-256-aes esp-sha-hmac ,
        in use settings ={Tunnel, }
        conn id: 2, flow_id: SW:2, sibling_flags 80004040, crypto map: MYMAP
        sa timing: remaining key lifetime (k/sec): (4188495/2652)
        IV size: 16 bytes
        replay detection support: Y
        Status: ACTIVE(ACTIVE)

     outbound ah sas:

     outbound pcp sas:

문제 해결

이 섹션에서는 설정 문제 해결에 사용할 수 있는 정보를 제공합니다.

보안 연결 지우기

문제를 해결할 때는 변경 후 기존 SA를 지워야 합니다. PIX의 특권 모드에서는 다음 명령을 사용합니다.

• clear crypto ipsec sa - 활성 IPsec SA를 삭제합니다.

• clear crypto isakmp sa - 활성 IKE SA를 삭제합니다.

NAT 컨피그레이션 검토

• show nat detail - 객체/객체 그룹이 확장된 NAT 컨피그레이션을 표시합니다.

트러블슈팅 명령

설정이 올바르게 작동하는지 확인하려면 이 섹션을 활용하십시오.

Cisco CLI Analyzer(등록 고객만 해당)는 특정 show 명령을 지원합니다. Cisco CLI Analyzer를 사용하여 show 명령 출력의 분석을 봅니다.

참고: 디버그 명령을 사용하기 전에 Debug Commands 및 IP Security Troubleshooting - Understanding and Using debug Commands(디버그 명령 및 IP 보안 문제 해결 - 디버그 명령 이해 및 사용)에 대한 중요 정보를 참조하십시오.

• debug crypto ipsec - 2단계의 IPsec 협상을 표시합니다.

• debug crypto isakmp - 1단계의 ISAKMP 협상을 표시합니다.

관련 정보

• 가장 일반적인 L2L 및 원격 액세스 IPsec VPN 문제 해결 솔루션
• IPSec 협상/IKE 프로토콜
• 기술 지원 및 문서 − Cisco Systems