Ce document fournit un exemple de configuration pour un tunnel IPsec IOS-à-IOS utilisant le chiffrement d'Advanced Encryption Standard (AES).
La prise en charge du cryptage AES a été introduite dans Cisco IOS® 12.2(13)T.
Les informations contenues dans ce document sont basées sur les versions de matériel et de logiciel suivantes :
Logiciel Cisco IOS Version 12.3(10)
Routeurs Cisco 1721
The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, make sure that you understand the potential impact of any command.
Pour plus d'informations sur les conventions utilisées dans ce document, reportez-vous aux Conventions relatives aux conseils techniques Cisco.
Cette section vous fournit des informations pour configurer les fonctionnalités décrites dans ce document.
Remarque : Pour en savoir plus sur les commandes utilisées dans le présent document, utilisez l’outil de recherche de commandes (clients inscrits seulement).
Ce document utilise les configurations indiquées ici.
Routeur 1721-A |
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R-1721-A#show run Building configuration... Current configuration : 1706 bytes ! ! Last configuration change at 00:46:32 UTC Fri Sep 10 2004 ! NVRAM config last updated at 00:45:48 UTC Fri Sep 10 2004 ! version 12.3 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname R-1721-A ! boot-start-marker boot-end-marker ! ! memory-size iomem 15 mmi polling-interval 60 no mmi auto-configure no mmi pvc mmi snmp-timeout 180 no aaa new-model ip subnet-zero ip cef ! ! ! ip audit po max-events 100 no ip domain lookup no ftp-server write-enable ! ! ! ! !--- Define Internet Key Exchange (IKE) policy. crypto isakmp policy 10 !--- Specify the 256-bit AES as the !--- encryption algorithm within an IKE policy. encr aes 256 !--- Specify that pre-shared key authentication is used. authentication pre-share !--- Specify the shared secret. crypto isakmp key cisco123 address 10.48.66.146 ! ! !--- Define the IPSec transform set. crypto ipsec transform-set aesset esp-aes 256 esp-sha-hmac ! !--- Define crypto map entry name "aesmap" that will use !--- IKE to establish the security associations (SA). crypto map aesmap 10 ipsec-isakmp !--- Specify remote IPSec peer. set peer 10.48.66.146 !--- Specify which transform sets !--- are allowed for this crypto map entry. set transform-set aesset !--- Name the access list that determines which traffic !--- should be protected by IPSec. match address acl_vpn ! ! ! interface ATM0 no ip address shutdown no atm ilmi-keepalive dsl equipment-type CPE dsl operating-mode GSHDSL symmetric annex A dsl linerate AUTO ! interface Ethernet0 ip address 192.168.100.1 255.255.255.0 ip nat inside half-duplex ! interface FastEthernet0 ip address 10.48.66.147 255.255.254.0 ip nat outside speed auto !--- Apply crypto map to the interface. crypto map aesmap ! ip nat inside source list acl_nat interface FastEthernet0 overload ip classless ip route 0.0.0.0 0.0.0.0 10.48.66.1 ip route 192.168.200.0 255.255.255.0 FastEthernet0 no ip http server no ip http secure-server ! ip access-list extended acl_nat !--- Exclude protected traffic from being NAT'ed. deny ip 192.168.100.0 0.0.0.255 192.168.200.0 0.0.0.255 permit ip 192.168.100.0 0.0.0.255 any !--- Access list that defines traffic protected by IPSec. ip access-list extended acl_vpn permit ip 192.168.100.0 0.0.0.255 192.168.200.0 0.0.0.255 ! ! line con 0 exec-timeout 0 0 line aux 0 line vty 0 4 ! end R-1721-A# |
Routeur 1721-B |
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R-1721-B#show run Building configuration... Current configuration : 1492 bytes ! ! Last configuration change at 14:11:41 UTC Wed Sep 8 2004 ! version 12.3 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname R-1721-B ! boot-start-marker boot-end-marker ! ! memory-size iomem 15 mmi polling-interval 60 no mmi auto-configure no mmi pvc mmi snmp-timeout 180 no aaa new-model ip subnet-zero ip cef ! ! ! ip audit po max-events 100 no ip domain lookup no ftp-server write-enable ! ! ! ! ! !--- Define IKE policy. crypto isakmp policy 10 !--- Specify the 256-bit AES as the !--- encryption algorithm within an IKE policy. encr aes 256 !--- Specify that pre-shared key authentication is used. authentication pre-share !--- Specify the shared secret. crypto isakmp key cisco123 address 10.48.66.147 ! ! !--- Define the IPSec transform set. crypto ipsec transform-set aesset esp-aes 256 esp-sha-hmac ! !--- Define crypto map entry name "aesmap" that uses !--- IKE to establish the SA. crypto map aesmap 10 ipsec-isakmp !--- Specify remote IPSec peer. set peer 10.48.66.147 !--- Specify which transform sets !--- are allowed for this crypto map entry. set transform-set aesset !--- Name the access list that determines which traffic !--- should be protected by IPSec. match address acl_vpn ! ! ! interface Ethernet0 ip address 192.168.200.1 255.255.255.0 ip nat inside half-duplex ! interface FastEthernet0 ip address 10.48.66.146 255.255.254.0 ip nat outside speed auto !--- Apply crypto map to the interface. crypto map aesmap ! ip nat inside source list acl_nat interface FastEthernet0 overload ip classless ip route 0.0.0.0 0.0.0.0 10.48.66.1 ip route 192.168.100.0 255.255.255.0 FastEthernet0 no ip http server no ip http secure-server ! ip access-list extended acl_nat !--- Exclude protected traffic from being NAT'ed. deny ip 192.168.200.0 0.0.0.255 192.168.100.0 0.0.0.255 permit ip 192.168.200.0 0.0.0.255 any !--- Access list that defines traffic protected by IPSec. ip access-list extended acl_vpn permit ip 192.168.200.0 0.0.0.255 192.168.100.0 0.0.0.255 ! ! line con 0 exec-timeout 0 0 line aux 0 line vty 0 4 ! end R-1721-B# |
Cette section présente des informations que vous pouvez utiliser pour vous assurer que votre configuration fonctionne correctement.
Certaines commandes show sont prises en charge par l'Output Interpreter Tool (clients enregistrés uniquement), qui vous permet de voir une analyse de la sortie de la commande show.
show crypto isakmp sa : affiche l'état de l'association de sécurité Internet et du protocole de gestion de clé (ISAKMP) SA.
Routeur 1721-A |
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R-1721-A#show crypto isakmp sa dst src state conn-id slot 10.48.66.147 10.48.66.146 QM_IDLE 1 0 |
Routeur 1721-B |
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R-1721-B#show crypto isakmp sa dst src state conn-id slot 10.48.66.147 10.48.66.146 QM_IDLE 1 0 |
show crypto ipsec sa : affiche les statistiques sur les tunnels actifs.
Routeur 1721-A |
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R-1721-A#show crypto ipsec sa interface: FastEthernet0 Crypto map tag: aesmap, local addr. 10.48.66.147 protected vrf: local ident (addr/mask/prot/port): (192.168.100.0/255.255.255.0/0/0) remote ident (addr/mask/prot/port): (192.168.200.0/255.255.255.0/0/0) current_peer: 10.48.66.146:500 PERMIT, flags={origin_is_acl,} #pkts encaps: 30, #pkts encrypt: 30, #pkts digest 30 #pkts decaps: 30, #pkts decrypt: 30, #pkts verify 30 #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.: 10.48.66.147, remote crypto endpt.: 10.48.66.146 path mtu 1500, ip mtu 1500, ip mtu idb FastEthernet0 current outbound spi: 2EB0BA1A inbound esp sas: spi: 0xFECA28BC(4274661564) transform: esp-256-aes esp-sha-hmac , in use settings ={Tunnel, } slot: 0, conn id: 2000, flow_id: 1, crypto map: aesmap sa timing: remaining key lifetime (k/sec): (4554237/2895) IV size: 16 bytes replay detection support: Y inbound ah sas: inbound pcp sas: outbound esp sas: spi: 0x2EB0BA1A(783333914) transform: esp-256-aes esp-sha-hmac , in use settings ={Tunnel, } slot: 0, conn id: 2001, flow_id: 2, crypto map: aesmap sa timing: remaining key lifetime (k/sec): (4554237/2894) IV size: 16 bytes replay detection support: Y outbound ah sas: outbound pcp sas: R-1721-A# |
Routeur 1721-B |
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R-1721-B#show crypto ipsec sa interface: FastEthernet0 Crypto map tag: aesmap, local addr. 10.48.66.146 protected vrf: local ident (addr/mask/prot/port): (192.168.200.0/255.255.255.0/0/0) remote ident (addr/mask/prot/port): (192.168.100.0/255.255.255.0/0/0) current_peer: 10.48.66.147:500 PERMIT, flags={origin_is_acl,} #pkts encaps: 30, #pkts encrypt: 30, #pkts digest 30 #pkts decaps: 30, #pkts decrypt: 30, #pkts verify 30 #pkts compressed: 0, #pkts decompressed: 0 #pkts not compressed: 0, #pkts compr. failed: 0 #pkts not decompressed: 0, #pkts decompress failed: 0 #send errors 5, #recv errors 0 local crypto endpt.: 10.48.66.146, remote crypto endpt.: 10.48.66.147 path mtu 1500, ip mtu 1500, ip mtu idb FastEthernet0 current outbound spi: FECA28BC inbound esp sas: spi: 0x2EB0BA1A(783333914) transform: esp-256-aes esp-sha-hmac , in use settings ={Tunnel, } slot: 0, conn id: 2000, flow_id: 1, crypto map: aesmap sa timing: remaining key lifetime (k/sec): (4583188/2762) IV size: 16 bytes replay detection support: Y inbound ah sas: inbound pcp sas: outbound esp sas: spi: 0xFECA28BC(4274661564) transform: esp-256-aes esp-sha-hmac , in use settings ={Tunnel, } slot: 0, conn id: 2001, flow_id: 2, crypto map: aesmap sa timing: remaining key lifetime (k/sec): (4583188/2761) IV size: 16 bytes replay detection support: Y outbound ah sas: outbound pcp sas: R-1721-B# |
show crypto engine connections active : affiche le total des chiffrements/déchiffrements par SA.
Routeur 1721-A |
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R-1721-A#show crypto engine connections active ID Interface IP-Address State Algorithm Encrypt Decrypt 1 FastEthernet0 10.48.66.147 set HMAC_SHA+AES_256_C 0 0 2000 FastEthernet0 10.48.66.147 set HMAC_SHA+AES_256_C 0 30 2001 FastEthernet0 10.48.66.147 set HMAC_SHA+AES_256_C 30 0 |
Routeur 1721-B |
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R-1721-B#show crypto engine connections active ID Interface IP-Address State Algorithm Encrypt Decrypt 1 FastEthernet0 10.48.66.146 set HMAC_SHA+AES_256_C 0 0 2000 FastEthernet0 10.48.66.146 set HMAC_SHA+AES_256_C 0 30 2001 FastEthernet0 10.48.66.146 set HMAC_SHA+AES_256_C 30 0 |
Cette section fournit des informations que vous pouvez utiliser pour dépanner votre configuration.
Remarque : avant d'émettre des commandes debug, consultez Informations importantes sur les commandes de débogage.
debug crypto ipsec — Affiche des événements IPsec.
debug crypto isakmp—Affichage de messages d'événements IKE.
debug crypto engine — Affiche des informations du moteur de chiffrement.
Vous trouverez les informations supplémentaires pour dépanner IPSec à la section Dépannage de sécurité IP - Présentation et utilisation des commandes de débogage.
Révision | Date de publication | Commentaires |
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1.0 |
28-May-2003 |
Première publication |