IPsec router-to-router configureren met NAT-overload en Cisco beveiligde VPN-client

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Bijgewerkt:1 mei 2007

Document-id:14132

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Inhoud

Inleiding

Voorwaarden

Vereisten

Gebruikte componenten

Conventies

Configureren

Netwerkdiagram

Configuraties

Verifiëren

Problemen oplossen

Opdrachten voor troubleshooting

Gerelateerde informatie

Inleiding

Deze voorbeeldconfiguratie versleutelt het verkeer van het netwerk achter Light naar het netwerk achter House (het netwerk van 192.168.100.x tot 192.168.200.x). Network Address Translation (NAT) overload wordt ook uitgevoerd. Versleutelde VPN-clientverbindingen zijn toegestaan in Light met wild-card, pre-gedeelde toetsen en mode-configuratie. Verkeer naar het internet wordt vertaald, maar niet versleuteld.

Voorwaarden

Vereisten

Er zijn geen specifieke vereisten van toepassing op dit document.

Gebruikte componenten

De informatie in dit document is gebaseerd op de volgende software- en hardware-versies:

Cisco IOS® softwarerelease 12.2.7 en 12.2.8T
Cisco Secure VPN-client 1.1 (weergegeven als 2.1.12 in de Help-client > Info-menu)
Cisco 3600 routers

N.B.: Als u Cisco 2600 Series routers voor dit soort VPN-scenario gebruikt, moeten de routers worden geïnstalleerd met crypto IPsec VPN-afbeeldingen.

De informatie in dit document is gebaseerd op de apparaten in een specifieke laboratoriumomgeving. Alle apparaten die in dit document worden beschreven, hadden een opgeschoonde (standaard)configuratie. Als uw netwerk live is, moet u de potentiële impact van elke opdracht begrijpen.

Lichtconfiguratie
Configuratie thuis
VPN-clientconfiguratie

Lichtconfiguratie
Current configuration : 2047 bytes ! version 12.2 service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname Light ! boot system flash:c3660-ik9o3s-mz.122-8T ! ip subnet-zero ! ip audit notify log ip audit po max-events 100 ip ssh time-out 120 ip ssh authentication-retries 3 ! !--- IPsec Internet Security Association and !--- Key Management Protocol (ISAKMP) policy. crypto isakmp policy 5 hash md5 authentication pre-share !--- ISAKMP key for static LAN-to-LAN tunnel !--- without extended authenticaton (xauth). crypto isakmp key cisco123 address 10.64.10.45 no-xauth !--- ISAKMP key for the dynamic VPN Client. crypto isakmp key 123cisco address 0.0.0.0 0.0.0.0 !--- Assign the IP address to the VPN Client. crypto isakmp client configuration address-pool local test-pool ! ! ! crypto ipsec transform-set testset esp-des esp-md5-hmac ! crypto dynamic-map test-dynamic 10 set transform-set testset ! ! !--- VPN Client mode configuration negotiation, !--- such as IP address assignment and xauth. crypto map test client configuration address initiate crypto map test client configuration address respond !--- Static crypto map for the LAN-to-LAN tunnel. crypto map test 5 ipsec-isakmp set peer 10.64.10.45 set transform-set testset !--- Include the private network-to-private network traffic !--- in the encryption process. match address 115 !--- Dynamic crypto map for the VPN Client. crypto map test 10 ipsec-isakmp dynamic test-dynamic ! call rsvp-sync ! ! ! ! ! fax interface-type modem mta receive maximum-recipients 0 ! controller E1 2/0 ! ! ! interface FastEthernet0/0 ip address 10.64.10.44 255.255.255.224 ip nat outside duplex auto speed auto crypto map test ! interface FastEthernet0/1 ip address 192.168.100.1 255.255.255.0 ip nat inside duplex auto speed auto ! interface BRI4/0 no ip address shutdown ! interface BRI4/1 no ip address shutdown ! interface BRI4/2 no ip address shutdown ! interface BRI4/3 no ip address shutdown ! !--- Define the IP address pool for the VPN Client. ip local pool test-pool 192.168.1.1 192.168.1.254 !--- Exclude the private network and VPN Client !--- traffic from the NAT process. ip nat inside source route-map nonat interface FastEthernet0/0 overload ip classless ip route 0.0.0.0 0.0.0.0 10.64.10.33 ip http server ip pim bidir-enable ! !--- Exclude the private network and VPN Client !--- traffic from the NAT process. access-list 110 deny ip 192.168.100.0 0.0.0.255 192.168.200.0 0.0.0.255 access-list 110 deny ip 192.168.100.0 0.0.0.255 192.168.1.0 0.0.0.255 access-list 110 permit ip 192.168.100.0 0.0.0.255 any !--- Include the private network-to-private network traffic !--- in the encryption process. access-list 115 permit ip 192.168.100.0 0.0.0.255 192.168.200.0 0.0.0.255 ! !--- Exclude the private network and VPN Client !--- traffic from the NAT process. route-map nonat permit 10 match ip address 110 ! ! dial-peer cor custom ! ! ! ! ! line con 0 line 97 108 line aux 0 line vty 0 4 ! end

Lichtconfiguratie

 Current configuration : 2047 bytes
 !
 version 12.2
 service timestamps debug uptime
 service timestamps log uptime
 no service password-encryption
 !
 hostname Light
 !
 boot system flash:c3660-ik9o3s-mz.122-8T
 !
 ip subnet-zero
 !
 ip audit notify log
 ip audit po max-events 100
 ip ssh time-out 120
 ip ssh authentication-retries 3
 !

!--- IPsec Internet Security Association and !--- Key Management Protocol (ISAKMP) policy.

 crypto isakmp policy 5
  hash md5
  authentication pre-share

!--- ISAKMP key for static LAN-to-LAN tunnel !--- without extended authenticaton (xauth).

 crypto isakmp key cisco123 address 10.64.10.45 no-xauth

!--- ISAKMP key for the dynamic VPN Client.

 crypto isakmp key 123cisco address 0.0.0.0 0.0.0.0

!--- Assign the IP address to the VPN Client.

 crypto isakmp client configuration address-pool local test-pool
 !
 !
 ! 
 crypto ipsec transform-set testset esp-des esp-md5-hmac 
 !
 crypto dynamic-map test-dynamic 10
  set transform-set testset 
 !
 !

!--- VPN Client mode configuration negotiation, !--- such as IP address assignment and xauth.

 crypto map test client configuration address initiate
 crypto map test client configuration address respond

!--- Static crypto map for the LAN-to-LAN tunnel.

 crypto map test 5 ipsec-isakmp   
  set peer 10.64.10.45
  set transform-set testset 

!--- Include the private network-to-private network traffic !--- in the encryption process.

  match address 115

!--- Dynamic crypto map for the VPN Client.

 crypto map test 10 ipsec-isakmp dynamic test-dynamic 
 !


 call rsvp-sync
 !
 !
 !         
 !
 !
 fax interface-type modem
 mta receive maximum-recipients 0
 !
 controller E1 2/0
 !
 !
 !
 interface FastEthernet0/0
  ip address 10.64.10.44 255.255.255.224
  ip nat outside
  duplex auto
  speed auto
  crypto map test
 !
 interface FastEthernet0/1
  ip address 192.168.100.1 255.255.255.0
  ip nat inside
  duplex auto
  speed auto
 !
 interface BRI4/0
  no ip address
  shutdown
 !
 interface BRI4/1
  no ip address
  shutdown
 !
 interface BRI4/2
  no ip address
  shutdown
 !
 interface BRI4/3
  no ip address
  shutdown
 !
 
!--- Define the IP address pool for the VPN Client.

 ip local pool test-pool 192.168.1.1 192.168.1.254

!--- Exclude the private network and VPN Client !--- traffic from the NAT process.

 ip nat inside source route-map nonat interface FastEthernet0/0 overload 
 ip classless
 ip route 0.0.0.0 0.0.0.0 10.64.10.33
 ip http server
 ip pim bidir-enable
 !

!--- Exclude the private network and VPN Client !--- traffic from the NAT process.

 access-list 110 deny   ip 192.168.100.0 0.0.0.255 192.168.200.0 0.0.0.255
 access-list 110 deny   ip 192.168.100.0 0.0.0.255 192.168.1.0 0.0.0.255
 access-list 110 permit ip 192.168.100.0 0.0.0.255 any

!--- Include the private network-to-private network traffic !--- in the encryption process.

 access-list 115 permit ip 192.168.100.0 0.0.0.255 192.168.200.0 0.0.0.255
 !

!--- Exclude the private network and VPN Client !--- traffic from the NAT process.

 route-map nonat permit 10
  match ip address 110 
 !
 !
 dial-peer cor custom
 !
 !
 !
 !
 !
 line con 0
 line 97 108
 line aux 0
 line vty 0 4
 !
 end

Configuratie thuis
Current configuration : 1689 bytes ! version 12.2 service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname house ! boot system flash:c3660-jk8o3s-mz.122-7.bin ! ip subnet-zero ! ! no ip domain-lookup ! ip audit notify log ip audit po max-events 100 ip ssh time-out 120 ip ssh authentication-retries 3 ! !--- IPsec ISAKMP policy. crypto isakmp policy 5 hash md5 authentication pre-share !--- ISAKMP key for static LAN-to-LAN tunnel without xauth authenticaton. crypto isakmp key cisco123 address 10.64.10.44 no-xauth ! ! crypto ipsec transform-set testset esp-des esp-md5-hmac ! !--- Static crypto map for the LAN-to-LAN tunnel. crypto map test 5 ipsec-isakmp set peer 10.64.10.44 set transform-set testset !--- Include the private network-to-private network traffic !--- in the encryption process. match address 115 ! call rsvp-sync cns event-service server ! ! ! ! ! fax interface-type modem mta receive maximum-recipients 0 ! ! ! interface FastEthernet0/0 ip address 10.64.10.45 255.255.255.224 ip nat outside duplex auto speed auto crypto map test ! interface FastEthernet0/1 ip address 192.168.200.1 255.255.255.0 ip nat inside duplex auto speed auto ! interface BRI2/0 no ip address shutdown ! interface BRI2/1 no ip address shutdown ! interface BRI2/2 no ip address shutdown ! interface BRI2/3 no ip address shutdown ! interface FastEthernet4/0 no ip address shutdown duplex auto speed auto ! !--- Exclude the private network traffic !--- from the dynamic (dynamic association to a pool) NAT process. ip nat inside source route-map nonat interface FastEthernet0/0 overload ip classless ip route 0.0.0.0 0.0.0.0 10.64.10.33 no ip http server ip pim bidir-enable ! !--- Exclude the private network traffic from the NAT process. access-list 110 deny ip 192.168.200.0 0.0.0.255 192.168.100.0 0.0.0.255 access-list 110 permit ip 192.168.200.0 0.0.0.255 any !--- Include the private network-to-private network traffic !--- in the encryption process. access-list 115 permit ip 192.168.200.0 0.0.0.255 192.168.100.0 0.0.0.255 !--- Exclude the private network traffic from the NAT process. route-map nonat permit 10 match ip address 110 ! ! ! dial-peer cor custom ! ! ! ! ! line con 0 line aux 0 line vty 0 4 login ! end

Configuratie thuis

Current configuration : 1689 bytes
 !
 version 12.2
 service timestamps debug uptime
 service timestamps log uptime
 no service password-encryption
 !
 hostname house
 !
 boot system flash:c3660-jk8o3s-mz.122-7.bin
 !
 ip subnet-zero
 !
 !
 no ip domain-lookup
 !
 ip audit notify log
 ip audit po max-events 100
 ip ssh time-out 120
 ip ssh authentication-retries 3
 !

!--- IPsec ISAKMP policy.

 crypto isakmp policy 5
  hash md5 
  authentication pre-share

!--- ISAKMP key for static LAN-to-LAN tunnel without xauth authenticaton.

 crypto isakmp key cisco123 address 10.64.10.44 no-xauth
 !
 !
 crypto ipsec transform-set testset esp-des esp-md5-hmac 
 !

!--- Static crypto map for the LAN-to-LAN tunnel.

 crypto map test 5 ipsec-isakmp   
  set peer 10.64.10.44
  set transform-set testset 

!--- Include the private network-to-private network traffic !--- in the encryption process.

  match address 115 
 !
 call rsvp-sync
 cns event-service server
 !
 !
 !
 !
 !
 fax interface-type modem
 mta receive maximum-recipients 0
 !
 !
 !         
 interface FastEthernet0/0
  ip address 10.64.10.45 255.255.255.224
  ip nat outside
  duplex auto
  speed auto
  crypto map test
 !
 interface FastEthernet0/1
  ip address 192.168.200.1 255.255.255.0
  ip nat inside
  duplex auto
  speed auto
 !
 interface BRI2/0
  no ip address
  shutdown
 !
 interface BRI2/1
  no ip address
  shutdown
 !
 interface BRI2/2
  no ip address
  shutdown
 !
 interface BRI2/3
  no ip address
  shutdown
 !
 interface FastEthernet4/0
  no ip address
  shutdown
  duplex auto
  speed auto
 !
 
!--- Exclude the private network traffic !--- from the dynamic (dynamic association to a pool) NAT process.

 ip nat inside source route-map nonat interface FastEthernet0/0 overload
 ip classless
 ip route 0.0.0.0 0.0.0.0 10.64.10.33
 no ip http server
 ip pim bidir-enable
 !
 
!--- Exclude the private network traffic from the NAT process.

 access-list 110 deny   ip 192.168.200.0 0.0.0.255 192.168.100.0 0.0.0.255
 access-list 110 permit ip 192.168.200.0 0.0.0.255 any

!--- Include the private network-to-private network traffic !--- in the encryption process.

 access-list 115 permit ip 192.168.200.0 0.0.0.255 192.168.100.0 0.0.0.255
 
!--- Exclude the private network traffic from the NAT process.

 route-map nonat permit 10
  match ip address 110
 !
 !
 !
 dial-peer cor custom
 !
 !
 !
 !
 !
 line con 0
 line aux 0
 line vty 0 4
  login
 !
 end

VPN-clientconfiguratie
Network Security policy: 1- TOLIGHT My Identity Connection security: Secure Remote Party Identity and addressing ID Type: IP subnet 192.168.100.0 255.255.255.0 Port all Protocol all Connect using secure tunnel ID Type: IP address 10.64.10.44 Pre-shared Key=123cisco Authentication (Phase 1) Proposal 1 Authentication method: pre-shared key Encryp Alg: DES Hash Alg: MD5 SA life: Unspecified Key Group: DH 1 Key exchange (Phase 2) Proposal 1 Encapsulation ESP Encrypt Alg: DES Hash Alg: MD5 Encap: tunnel SA life: Unspecified no AH 2- Other Connections Connection security: Non-secure Local Network Interface Name: Any IP Addr: Any Port: All

VPN-clientconfiguratie

Network Security policy:
       1- TOLIGHT
       My Identity
       Connection security: Secure
       Remote Party Identity and addressing
       ID Type: IP subnet
       192.168.100.0
       255.255.255.0
       Port all Protocol all
       
  Connect using secure tunnel
         ID Type: IP address
         10.64.10.44

       
  Pre-shared Key=123cisco

       
  Authentication (Phase 1)
         Proposal 1
         Authentication method: pre-shared key
         Encryp Alg: DES
         Hash Alg: MD5
         SA life: Unspecified
         Key Group: DH 1

       
  Key exchange (Phase 2)
         Proposal 1
         Encapsulation ESP
         Encrypt Alg: DES
         Hash Alg: MD5
         Encap: tunnel
         SA life: Unspecified
         no AH

       
  2- Other Connections
         Connection security: Non-secure
         Local Network Interface
         Name: Any
         IP Addr: Any
         Port: All

Verifiëren

Gebruik dit gedeelte om te bevestigen dat de configuratie correct werkt.

Het Uitvoer Tolk (uitsluitend geregistreerde klanten) (OIT) ondersteunt bepaalde show opdrachten. Gebruik de OIT om een analyse van tonen opdrachtoutput te bekijken.

toon crypto ipsec sa-shows the fase 2 Security Associations (SAs).
toon crypto isakmp sa — toont fase 1 SAs.

Problemen oplossen

Gebruik dit gedeelte om de configuratie van het probleem op te lossen.

Opdrachten voor troubleshooting

Het Uitvoer Tolk (uitsluitend geregistreerde klanten) (OIT) ondersteunt bepaalde show opdrachten. Gebruik de OIT om een analyse van tonen opdrachtoutput te bekijken.

Opmerking: Raadpleeg Belangrijke informatie over debug Commands voordat u debug-opdrachten gebruikt.

debug crypto ipsec - toont de IPsec onderhandelingen van fase 2.
debug crypto isakmp — toont de ISAKMP-onderhandelingen over fase 1.
debug crypto motor - toont het verkeer dat wordt versleuteld.
duidelijke crypto isakmp — ontruimt de SA's in verband met fase 1.
duidelijke crypto sa — ontruimt de SA's in verband met fase 2.

Gerelateerde informatie

Revisiegeschiedenis

Revisie	Publicatiedatum	Opmerkingen
1.0	01-May-2007	Eerste vrijgave

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