Configurando o Roteador para Cliente de VPN, Mode-Config, Chave pré-compartilhada de caracteres gerais com NAT
Contents
Introduction
Esta configuração de exemplo ilustra um roteador configurado para a configuração de modo (o usuário obtém um endereço IP de um conjunto), as chaves pré-compartilhadas curinga (todos clientes PC compartilham uma chave em comum) e a Tradução de Endereço de Rede (NAT). Nesta configuração, um usuário externo pode entrar na rede e ter um endereço IP interno atribuído ao pool. Aos usuários, parece que estão dentro da rede. Devido ao endereçamento privado, portanto, a NAT está envolvida, o roteador deve ser informado sobre o que traduzir e o que não traduzir.
Prerequisites
Requirements
Não existem requisitos específicos para este documento.
Componentes Utilizados
As informações neste documento são baseadas nestas versões de software e hardware:
-
Software Cisco IOS® versão 12.0.7T ou posterior
-
Hardware que suporta esta revisão de software
-
CiscoSecure VPN Client 1.0/10A ou 1.1 (mostrado como 2.0.7/E ou 2.1.12, respectivamente, vá para Ajuda > Sobre verificar)
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.
Conventions
For more information on document conventions, refer to the Cisco Technical Tips Conventions.
Configurar
Nesta seção, você encontrará informações para configurar os recursos descritos neste documento.
Observação: para encontrar informações adicionais sobre os comandos usados neste documento, use a ferramenta Command Lookup Tool (somente clientes registrados).
Diagrama de Rede
Este documento utiliza a configuração de rede mostrada neste diagrama.
Configurações
Este documento utiliza estas configurações.
| Configuração de cliente de VPN |
|---|
Network Security policy:
1- Myconn
My Identity = ip address
Connection security: Secure
Remote Party Identity and addressing
ID Type: IP subnet
10.2.2.0
Port all Protocol all
Connect using secure tunnel
ID Type: IP address
201.70.32.101
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 |
| Configuração do roteador |
|---|
Current configuration: ! version 12.0 service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname Router ! enable secret 5 $1$v5OP$mPuiEQn8ULa8hVMYVOV1D. enable password ww ! ip subnet-zero ! cns event-service server ! !--- IKE configuration. crypto isakmp policy 1 hash md5 authentication pre-share crypto isakmp key cisco123 address 0.0.0.0 crypto isakmp client configuration address-pool local ourpool ! !--- IPSec configuration. crypto ipsec transform-set trans1 esp-des esp-md5-hmac ! crypto dynamic-map dynmap 10 set transform-set trans1 ! crypto map intmap client configuration address initiate crypto map intmap client configuration address respond crypto map intmap 10 ipsec-isakmp dynamic dynmap ! interface Ethernet0 ip address 201.70.32.101 255.255.255.0 no ip directed-broadcast ip nat outside no ip route-cache no ip mroute-cache crypto map intmap ! interface Serial1 ip address 10.2.2.1 255.255.255.0 no ip directed-broadcast ip nat inside ! ip local pool ourpool 10.2.1.1 10.2.1.254 ip nat pool outsidepool 201.70.32.150 201.70.32.160 netmask 255.255.255.0 !--- Except the private network to private network traffic !--- from the NAT process. ip nat inside source route-map nonat pool outsidepool ip classless ip route 0.0.0.0 0.0.0.0 201.70.32.1 no ip http server !--- Except the private network to private network traffic !--- from the NAT process. access-list 101 deny ip 10.2.2.0 0.0.0.255 10.2.1.0 0.0.0.255 access-list 101 permit ip 10.2.2.0 0.0.0.255 any route-map nonat permit 10 match ip address 101 ! line con 0 transport input none line aux 0 line vty 0 4 password ww login ! end |
Verificar
Esta seção fornece informações que você pode usar para confirmar se sua configuração está funcionando adequadamente.
A Output Interpreter Tool (somente clientes registrados) oferece suporte a determinados comandos show, o que permite exibir uma análise da saída do comando show.
-
show crypto engine connections ative —Mostra os pacotes criptografados e descriptografados.
-
show crypto ipsec sa — Mostra as associações de segurança da fase 2.
-
show crypto isakmp sa — Mostra as associações de segurança da fase 1.
Troubleshoot
Esta seção fornece informações que podem ser usadas para o troubleshooting da sua configuração.
Comandos para Troubleshooting
Observação: antes de inserir o comando debug, consulte Informações importantes sobre os comandos debug.
Essas depurações devem ser executadas em ambos os roteadores IPSec (peers). A limpeza de associações de segurança deve ser feita em ambos os correspondentes.
-
debug crypto ipsec — Exibe as negociações de IPSec de fase 2
-
debug crypto isakmp — Exibe as negociações ISAKMP da Fase 1.
-
debug crypto engine — Exibe o tráfego que está criptografado.
-
clear crypto isakmp — Limpa as associações de segurança relacionadas à fase 1.
-
clear crypto sa — Limpa as associações de segurança relacionadas à fase 2.
Exemplo de saída de depuração
| Depurações de roteador |
|---|
Apr 18 15:17:59: ISAKMP (4): received packet from
201.70.32.82 (R) MM_NO_STATE
Apr 18 15:17:59: ISAKMP (4): received packet from
201.70.32.82 (R) MM_NO_STATE
Apr 18 15:18:03: ISAKMP (0): received packet from
201.70.32.82 (N) NEW SA
Apr 18 15:18:03: ISAKMP (0:5): processing SA payload.
message ID = 0
Apr 18 15:18:03: ISAKMP (0:5): Checking ISAKMP transform 1
against priority 1 policy
Apr 18 15:18:03: ISAKMP: encryption DES-CBC
Apr 18 15:18:03: ISAKMP: hash MD5
Apr 18 15:18:03: ISAKMP: default group 1
Apr 18 15:18:03: ISAKMP: auth pre-share
Apr 18 15:18:03: ISAKMP (0:5): atts are acceptable.
Next payload is 0
Apr 18 15:18:03: CryptoEngine0: generate alg parameter
Apr 18 15:18:05: CRYPTO_ENGINE: Dh phase 1 status: 0
Apr 18 15:18:05: CRYPTO_ENGINE: Dh phase 1 status: 0
Apr 18 15:18:05: ISAKMP (0:5): SA is doing pre-shared
key authentication
Apr 18 15:18:05: ISAKMP (5): SA is doing pre-shared
key authentication using id type ID_IPV4_ADDR
Apr 18 15:18:05: ISAKMP (5): sending packet to
201.70.32.82 (R) MM_SA_SETUP
Apr 18 15:18:05: ISAKMP (5): received packet from
201.70.32.82 (R) MM_SA_SETUP
Apr 18 15:18:05: ISAKMP (0:5): processing KE payload.
message ID = 0
Apr 18 15:18:05: CryptoEngine0: generate alg parameter
Apr 18 15:18:05: CRYPTO_ENGINE: Dh phase 1 status: 0
Apr 18 15:18:05: CRYPTO_ENGINE: Dh phase 1 status: 0
Apr 18 15:18:05: ISAKMP (0:5): SA is doing pre-shared
key authentication
Apr 18 15:18:05: ISAKMP (5): SA is doing pre-shared
key authentication using id
type ID_IPV4_ADDR
Apr 18 15:18:05: ISAKMP (5): sending packet to
201.70.32.82 (R) MM_SA_SETUP
Apr 18 15:18:05: ISAKMP (5): received packet from
201.70.32.82 (R) MM_SA_SETUP
Apr 18 15:18:05: ISAKMP (0:5): processing KE payload.
message ID = 0
Apr 18 15:18:05: CryptoEngine0: generate alg parameter
Apr 18 15:18:07: ISAKMP (0:5): processing NONCE payload.
message ID = 0
Apr 18 15:18:07: CryptoEngine0: create ISAKMP SKEYID for
conn id 5
Apr 18 15:18:07: ISAKMP (0:5): SKEYID state generated
Apr 18 15:18:07: ISAKMP (0:5): processing vendor id payload
Apr 18 15:18:07: ISAKMP (0:5): processing vendor id payload
Apr 18 15:18:07: ISAKMP (5): sending packet to 201.70.32.82
(R) MM_KEY_EXCH
Apr 18 15:18:07: ISAKMP (0:4): purging SA.
Apr 18 15:18:07: ISAKMP (0:4): purging node -1412157317
Apr 18 15:18:07: ISAKMP (0:4): purging node 1875403554
Apr 18 15:18:07: CryptoEngine0: delete connection 4
Apr 18 15:18:08: ISAKMP (5): received packet from
201.70.32.82 (R) MM_KEY_EXCH
Apr 18 15:18:08: ISAKMP (0:5): processing ID payload.
message ID = 0
Apr 18 15:18:08: ISAKMP (0:5): processing HASH payload.
message ID = 0
Apr 18 15:18:08: CryptoEngine0: generate hmac context
for conn id 5
Apr 18 15:18:08: ISAKMP (5): processing NOTIFY payload
24578 protocol 1 spi 0, message ID = 0
Apr 18 15:18:08: ISAKMP (0:5): SA has been authenticated
with 201.70.32.82
Apr 18 15:18:08: ISAKMP (5): ID payload
next-payload : 8
type : 1
protocol : 17
port : 500
length : 8
Apr 18 15:18:08: ISAKMP (5): Total payload length: 12
Apr 18 15:18:08: CryptoEngine0: generate hmac context
for conn id 5
Apr 18 15:18:08: CryptoEngine0: clear dh number
for conn id 1
Apr 18 15:18:08: ISAKMP (5): sending packet to
201.70.32.82 (R) QM_IDLE
Apr 18 15:18:08: ISAKMP (5): received packet from
201.70.32.82 (R) QM_IDLE
Apr 18 15:18:08: ISAKMP (0:5): Locking struct 14D0DC
on allocation
Apr 18 15:18:08: ISAKMP (0:5): allocating address
10.2.1.1
Apr 18 15:18:08: CryptoEngine0: generate hmac context
for conn id 5
Apr 18 15:18:08: ISAKMP (0:5): initiating peer config to
201.70.32.82. message ID = 1226793520
Apr 18 15:18:08: ISAKMP (5): sending packet to 201.70.32.82
(R) QM_IDLE
Apr 18 15:18:09: ISAKMP (5): received packet from 201.70.32.82
(R) QM_IDLE
Apr 18 15:18:09: ISAKMP (0:5): processing transaction payload
from 201.70.32.82. message ID = 1226793520
Apr 18 15:18:09: ISAKMP: recieved config from 201.70.32.82 .
Apr 18 15:18:09: CryptoEngine0: generate hmac context
for conn id 5
Apr 18 15:18:09: ISAKMP: Config payload type: 4
Apr 18 15:18:09: ISAKMP (0:5): peer accepted the address!
Apr 18 15:18:09: ISAKMP (0:5): adding static route for 10.2.1.1
Apr 18 15:18:09: ISAKMP (0:5): deleting node 1226793520
Apr 18 15:18:09: CryptoEngine0: generate hmac context for
conn id 5
Apr 18 15:18:09: ISAKMP (0:5): processing SA payload.
message ID = -617682048
Apr 18 15:18:09: ISAKMP (0:5): Checking IPSec proposal 1
Apr 18 15:18:09: ISAKMP: transform 1, ESP_DES
Apr 18 15:18:09: ISAKMP: attributes in transform:
Apr 18 15:18:09: ISAKMP: authenticator is HMAC-MD5
Apr 18 15:18:09: ISAKMP: encaps is 1
Apr 18 15:18:09: validate proposal 0
Apr 18 15:18:09: ISAKMP (0:5): atts are acceptable.
Apr 18 15:18:09: IPSEC(validate_proposal_request):
proposal part #1, (key eng. msg.) dest= 201.70.32.101,
src= 201.70.32.82, dest_proxy= 10.2.2.0/255.255.255.0/0/0
(type=4), src_proxy= 10.2.1.1/255.255.255.255/0/0 (type=1),
protocol= ESP, transform= esp-des esp-md5-hmac ,
lifedur= 0s and 0kb, spi= 0x0(0), conn_id= 0, keysize= 0,
flags= 0x4
Apr 18 15:18:09: validate proposal request 0
Apr 18 15:18:09: ISAKMP (0:5): processing NONCE payload.
message ID = -617682048
Apr 18 15:18:09: ISAKMP (0:5): processing ID payload.
message ID = -617682048
Apr 18 15:18:09: ISAKMP (5): ID_IPV4_ADDR src 10.2.1.1
prot 0 port 0
Apr 18 15:18:09: ISAKMP (0:5): processing ID payload.
message ID = -617682048
Apr 18 15:18:09: ISAKMP (5): ID_IPV4_ADDR_SUBNET dst
10.2.2.0/255.255.255.0 prot 0 port 0
Apr 18 15:18:09: IPSEC(key_engine): got a queue event...
Apr 18 15:18:09: IPSEC(spi_response): getting spi
153684796 for SA from 201.70.32.82 to 201.70.32.101
for prot 3
Apr 18 15:18:09: CryptoEngine0: generate hmac context
for conn id 5
Apr 18 15:18:09: ISAKMP (5): sending packet to 201.70.32.82
(R) QM_IDLE
Apr 18 15:18:09: ISAKMP (5): received packet from 201.70.32.82
(R) QM_IDLE
Apr 18 15:18:09: CryptoEngine0: generate hmac context
for conn id 5
Apr 18 15:18:09: ISAKMP (0:5): processing SA payload.
message ID = -1078114754
Apr 18 15:18:09: ISAKMP (0:5): Checking IPSec proposal 1
Apr 18 15:18:10: ISAKMP: transform 1, ESP_DES
Apr 18 15:18:10: ISAKMP: attributes in transform:
Apr 18 15:18:10: ISAKMP: authenticator is HMAC-MD5
Apr 18 15:18:10: ISAKMP: encaps is 1
Apr 18 15:18:10: validate proposal 0
Apr 18 15:18:10: ISAKMP (0:5): atts are acceptable.
Apr 18 15:18:10: IPSEC(validate_proposal_request):
proposal part #1, (key eng. msg.) dest= 201.70.32.101,
src= 201.70.32.82, dest_proxy= 10.2.2.0/255.255.255.0/0/0
(type=4), src_proxy= 10.2.1.1/255.255.255.255/0/0 (type=1),
protocol= ESP, transform= esp-des esp-md5-hmac ,
lifedur= 0s and 0kb, spi= 0x0(0), conn_id= 0, keysize= 0,
flags= 0x4
Apr 18 15:18:10: validate proposal request 0
Apr 18 15:18:10: ISAKMP (0:5): processing NONCE payload.
message ID = -1078114754
Apr 18 15:18:10: ISAKMP (0:5): processing ID payload.
message ID = -1078114754
Apr 18 15:18:10: ISAKMP (5): ID_IPV4_ADDR src 10.2.1.1
prot 0 port 0
Apr 18 15:18:10: ISAKMP (0:5): processing ID payload.
message ID = -1078114754
Apr 18 15:18:10: ISAKMP (5): ID_IPV4_ADDR_SUBNET dst
10.2.2.0/255.255.255.0 prot 0 port 0
Apr 18 15:18:10: IPSEC(key_engine): got a queue event...
Apr 18 15:18:10: IPSEC(spi_response): getting spi 224008976
for SA from 201.70.32.82 to 201.70.32.101
for prot 3
Apr 18 15:18:10: CryptoEngine0: generate hmac context
for conn id 5
Apr 18 15:18:10: ISAKMP (5): sending packet to 201.70.32.82
(R) QM_IDLE
Apr 18 15:18:10: ISAKMP (5): received packet from 201.70.32.82
(R) QM_IDLE
Apr 18 15:18:10: CryptoEngine0: generate hmac context
for conn id 5
Apr 18 15:18:10: ipsec allocate flow 0
Apr 18 15:18:10: ipsec allocate flow 0
Apr 18 15:18:10: ISAKMP (0:5): Creating IPSec SAs
Apr 18 15:18:10: inbound SA from 201.70.32.82
to 201.70.32.101 (proxy 10.2.1.1 to 10.2.2.0)
Apr 18 15:18:10: has spi 224008976 and conn_id 2000
and flags 4
Apr 18 15:18:10: outbound SA from 201.70.32.101
to 201.70.32.82 (proxy 10.2.2.0 to 10.2.1.1)
Apr 18 15:18:10: has spi -1084694986 and conn_id 2001
and flags 4
Apr 18 15:18:10: ISAKMP (0:5): deleting node -1078114754
Apr 18 15:18:10: IPSEC(key_engine): got a queue event...
Apr 18 15:18:10: IPSEC(initialize_sas): ,
(key eng. msg.) dest= 201.70.32.101, src= 201.70.32.82,
dest_proxy= 10.2.2.0/255.255.255.0/0/0 (type=4),
src_proxy= 10.2.1.1/0.0.0.0/0/0 (type=1),
protocol= ESP, transform= esp-des esp-md5-hmac ,
lifedur= 0s and 0kb,
spi= 0xD5A1B10(224008976), conn_id= 2000, keysize= 0,
flags= 0x4
Apr 18 15:18:10: IPSEC(initialize_sas): ,
(key eng. msg.) src= 201.70.32.101, dest= 201.70.32.82,
src_proxy= 10.2.2.0/255.255.255.0/0/0 (type=4),
dest_proxy= 10.2.1.1/0.0.0.0/0/0 (type=1),
protocol= ESP, transform= esp-des esp-md5-hmac ,
lifedur= 0s and 0kb,
spi= 0xBF58DE36(3210272310), conn_id= 2001, keysize= 0,
flags= 0x4
Apr 18 15:18:10: IPSEC(create_sa): sa created,
(sa) sa_dest= 201.70.32.101, sa_prot= 50,
sa_spi= 0xD5A1B10(224008976),
sa_trans= esp-des esp-md5-hmac , sa_conn_id= 2000
Apr 18 15:18:10: IPSEC(create_sa): sa created,
(sa) sa_dest= 201.70.32.82, sa_prot= 50,
sa_spi= 0xBF58DE36(3210272310),
sa_trans= esp-des esp-md5-hmac , sa_conn_id= 2001
Apr 18 15:18:10: ISAKMP: Locking struct 14D0DC for IPSEC
Apr 18 15:18:24: ISAKMP (0:5): retransmitting
phase 2 -617682048 ...
Apr 18 15:18:24: ISAKMP (5): sending packet to 201.70.32.82
(R) QM_IDLE
Router#show crypto ipsec
Apr 18 15:18:39: ISAKMP (0:5): retransmitting
phase 2 -617682048 ...
Apr 18 15:18:39: ISAKMP (5): sending packet to 201.70.32.82
(R) QM_IDLE sa
interface: Ethernet0
Crypto map tag: intmap, local addr. 201.70.32.101
local ident (addr/mask/prot/port):
(10.2.2.0/255.255.255.0/0/0)
remote ident (addr/mask/prot/port):
(10.2.1.1/255.255.255.255/0/0)
current_peer: 201.70.32.82
PERMIT, flags={}
#pkts encaps: 7, #pkts encrypt: 7, #pkts digest 7
#pkts decaps: 7, #pkts decrypt: 7, #pkts verify 7
#pkts compressed: 0, #pkts decompressed: 0
#pkts not compressed: 0, #pkts compr. failed: 0,
#pkts decompress failed: 0
#send errors 0, #recv errors 0
local crypto endpt.: 201.70.32.101, remote
crypto endpt.: 201.70.32.82
path mtu 1500, media mtu 1500
current outbound spi: BF58DE36
inbound esp sas:
spi: 0xD5A1B10(224008976)
transform: esp-des esp-md5-hmac ,
in use settings ={Tunnel, }
slot: 0, conn id: 2000, flow_id: 1,
crypto map: intmap
sa timing: remaining key lifetime
(k/sec): (4607999/3500)
IV size: 8 bytes
replay detection support: Y
inbound ah sas:
inbound pcp sas:
outbound esp sas:
spi: 0xBF58DE36(3210272310)
transform: esp-des esp-md5-hmac ,
in use settings ={Tunnel, }
slot: 0, conn id: 2001, flow_id: 2,
crypto map: intmap
sa timing: remaining key lifetime
(k/sec): (4607999/3500)
IV size: 8 bytes
replay detection support: Y
outbound ah sas:
outbound pcp sas:
Router#sho crypto engine connections active
ID Interface IP-Address State Algorithm Encrypt Decrypt
5 set HMAC_MD5+DES_56_CB 0 0
2000 Ethernet0 201.70.32.101 set HMAC_MD5+DES_56_CB 0 7
2001 Ethernet0 201.70.32.101 set HMAC_MD5+DES_56_CB 7 0
Crypto adjacency count : Lock: 0, Unlock: 0 |
| Informações do cliente VPN |
|---|
Client configuration:
C:\>ping -t 10.2.2.5
Reply from 10.2.2.5: bytes=32 time<0ms TTL=352
Reply from 10.2.2.5: bytes=32 time<10ms TTL=352
From Logview:
14:25:34.044 New Connection - Initiating IKE
Phase 1 (IP ADDR=201.70.32.101)
14:25:34.144 New Connection - SENDING>>>> ISAKMP
OAK MM (SA)
14:25:35.886 New Connection - RECEIVED<<< ISAKMP
OAK MM (SA)
14:25:36.067 New Connection - SENDING>>>> ISAKMP
OAK MM (KE, NON, VID, VID)
14:25:38.310 New Connection - RECEIVED<<< ISAKMP
OAK MM (KE, NON, VID)
14:25:38.460 New Connection - SENDING>>>> ISAKMP
OAK MM *(ID, HASH, NOTIFY:STATUS_INITIAL_CONTACT)
14:25:38.610 New Connection - RECEIVED<<< ISAKMP
OAK MM *(ID, HASH)
14:25:38.710 New Connection - Established IKE SA
14:25:38.811 New Connection - Initiating IKE Phase
2 with Client IDs (message id
: B01876)
14:25:38.911 Initiator = IP ADDR=201.70.32.82,
prot = 0 port = 0
14:25:39.011 Responder = IP SUBNET/MASK=10.2.2.0/255.255.255.0,
prot = 0 port = 0
14:25:39.111 New Connection - SENDING>>>>
ISAKMP OAK QM *(HASH, SA, NON, ID, ID)
14:25:39.251 New Connection - RECEIVED<<< ISAKMP
OAK TRANS *(HASH, ATTR)
14:25:39.351 New Connection - Received Private IP
Address = IP ADDR=10.2.1.1
14:25:39.451 New Connection - Discarding IPSec SA
negotiation (message id: B01876)
14:25:39.552 New Connection - SENDING>>>> ISAKMP OAK
TRANS *(HASH, ATTR)
14:25:40.022 New Connection - Received message for discarded
IPSec SA negotiation (message id: B01876)
14:25:40.122 New Connection - Initiating IKE Phase 2 with
Client IDs (message id: C8CB0CE)
14:25:40.223 Initiator = IP ADDR=10.2.1.1, prot = 0 port = 0
14:25:40.323 Responder = IP SUBNET/MASK=10.2.2.0/255.255.255.0,
prot = 0 port = 0
14:25:40.423 New Connection - SENDING>>>> ISAKMP OAK
QM *(HASH, SA, NON, ID, ID)
14:25:40.873 New Connection - RECEIVED<<< ISAKMP OAK
QM *(HASH, SA, NON, ID, ID,
NOTIFY:STATUS_RESP_LIFETIME)
14:25:40.974 New Connection - SENDING>>>> ISAKMP OAK
QM *(HASH)
14:25:41.074 New Connection - Loading IPSec SA
(Message ID = C8CB0CE OUTBOUND SPI = 19A22423
INBOUND SPI = E4829433)
14:25:41.174 |
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