配置Cisco PIX到Cisco安全VPN客戶端萬用字元、預共用、模式配置

簡介

此配置演示如何使用萬用字元、mode-config和sysopt connection permit-ipsec命令將VPN客戶端連線到PIX防火牆。sysopt connection permit-ipsec命令隱式允許來自IPSec隧道的任何資料包。此命令還會繞過對IPSec連線的相關access-list、conduit或access-group命令語句的檢查。

必要條件

需求

本文件沒有特定需求。

採用元件

本文件中的資訊是以下列軟體和硬體版本為依據.

• 帶有Cisco Secure VPN客戶端1.0的Cisco Secure PIX軟體版本6.3(3)(在幫助>關於選單中顯示為2.0.7)

或

• 帶有Cisco Secure VPN Client 1.1的Cisco Secure PIX軟體版本6.3(3)(在Help > About選單中顯示為2.1.12)

本文中的資訊是根據特定實驗室環境內的裝置所建立。文中使用到的所有裝置皆從已清除（預設）的組態來啟動。如果您的網路運作中，請確保您瞭解任何指令可能造成的影響。

慣例

如需文件慣例的詳細資訊，請參閱思科技術提示慣例。

設定

本節提供可用於設定本檔案中所述功能的資訊。

使用VPN客戶端的使用者連線並接收來自Internet服務提供商(ISP)的IP地址。 此地址將替換為PIX上mode-config pool中的IP地址(172.16.1.1 - 172.16.1.255)。 使用者可以訪問防火牆內部的所有內容（包括網路）。不運行VPN客戶端的使用者可以使用靜態分配提供的地址連線到Web伺服器。當使用者連線到網際網路時，內部使用者的流量不會通過IPSec隧道。

註：加密技術受出口管制約束。您有責任瞭解加密技術出口的相關法律。如果您對出口管制有任何疑問，請傳送電子郵件至export@cisco.com。

注意：要查詢有關本文檔中使用的命令的其他資訊，請參閱命令查詢工具(僅限註冊客戶)。

網路圖表

本檔案會使用此網路設定。

組態

本檔案會使用這些設定。

• PIX配置

• VPN客戶端配置

sv2-5(config)#show run
: Saved
:
PIX Version 6.3(3)
interface ethernet0 auto
interface ethernet1 auto
nameif ethernet0 outside security0
nameif ethernet1 inside security100
enable password 8Ry2YjIyt7RRXU24 encrypted
passwd 2KFQnbNIdI.2KYOU encrypted
hostname sv2-5
fixup protocol dns maximum-length 512
fixup protocol ftp 21
fixup protocol h323 h225 1720
fixup protocol h323 ras 1718-1719
fixup protocol http 80
fixup protocol rsh 514
fixup protocol rtsp 554
fixup protocol sip 5060
fixup protocol sip udp 5060
fixup protocol skinny 2000
fixup protocol smtp 25
fixup protocol sqlnet 1521
fixup protocol tftp 69
names

!--- Access-list defined for nat 0.

access-list 101 permit ip 192.168.10.0 255.255.255.0 172.16.1.0 255.255.255.0 

!--- Access-list applied on the outside interface.

access-list 102 permit tcp any host 209.168.201.9 eq www 
access-list 102 permit icmp any any 
pager lines 24
logging on
logging buffered debugging
mtu outside 1500
mtu inside 1500
ip address outside 209.168.201.70 255.255.255.0
ip address inside 192.168.10.1 255.255.255.0
ip audit info action alarm
ip audit attack action alarm

!--- Set up the mode-config pool.


ip local pool test 172.16.1.1-172.16.1.255
no failover
failover timeout 0:00:00
failover poll 15
no failover ip address outside
no failover ip address inside
pdm history enable
arp timeout 14400
global (outside) 1 interface

!--- Do not do Network Address Translation (NAT) for the VPN Client pool.


nat (inside) 0 access-list 101
nat (inside) 1 0.0.0.0 0.0.0.0 0 0

!--- Also allow *unencrypted* communication if desired.


static (inside,outside) 209.168.201.9 192.168.10.9 netmask 255.255.255.255 0 0 
access-group 102 in interface outside
route outside 0.0.0.0 0.0.0.0 209.168.201.1 1
timeout xlate 3:00:00
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 rpc 0:10:00 h225 1:00:00
timeout h323 0:05:00 mgcp 0:05:00 sip 0:30:00 sip_media 0:02:00
timeout uauth 0:05:00 absolute
aaa-server TACACS+ protocol tacacs+ 
aaa-server RADIUS protocol radius 
aaa-server LOCAL protocol local 
no snmp-server location
no snmp-server contact
snmp-server community public
no snmp-server enable traps
floodguard enable
sysopt connection permit-ipsec

!--- These are IPSec parameters.


crypto ipsec transform-set myset esp-des esp-md5-hmac 
crypto dynamic-map dynmap 10 set transform-set myset
crypto map mymap 10 ipsec-isakmp dynamic dynmap
crypto map mymap client configuration address initiate
crypto map mymap client configuration address respond
crypto map mymap interface outside

!--- These are IKE parameters.


isakmp enable outside
isakmp key ******** address 0.0.0.0 netmask 0.0.0.0 
isakmp identity address
isakmp client configuration address-pool local test outside
isakmp policy 10 authentication pre-share
isakmp policy 10 encryption des
isakmp policy 10 hash md5
isakmp policy 10 group 1
isakmp policy 10 lifetime 86400
telnet timeout 5
ssh timeout 5
console timeout 0
vpdn username cisco password ********* store-local
terminal width 80
Cryptochecksum:4f21dc73759ffae29935430132e662ef
: end

Network Security policy: 
  1- TACconn 
      My Identity 
           Connection security: Secure 
           Remote Party Identity and addressing 
           ID Type: IP subnet 
           192.168.10.0 
            255.255.255.0 
           Port all Protocol all 
  
      Connect using secure tunnel 
           ID Type: IP address 
           209.201.168.70 
  
      Pre-shared Key=cisco1234

      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

驗證

目前沒有適用於此組態的驗證程序。

疑難排解

本節提供的資訊可用於對組態進行疑難排解。

指令疑難排解

輸出直譯器工具(僅供註冊客戶使用)支援某些show命令，此工具可讓您檢視show命令輸出的分析。

注意：發出debug命令之前，請參閱有關Debug命令的重要資訊。

要檢視VPN客戶端調試，請啟用思科安全日誌檢視器。

• debug crypto ipsec sa — 顯示第2階段的IPSec協商。

• debug crypto isakmp — 顯示第1階段的網際網路安全關聯和金鑰管理協定(ISAKMP)協商。

請參閱以下debug輸出：

crypto_isakmp_process_block:src:209.168.202.229, 
dest:209.168.201.70 spt:500 dpt:500
OAK_MM exchange
ISAKMP (0): processing SA payload. message ID = 0

ISAKMP (0): Checking ISAKMP transform 1 against priority 10 policy
ISAKMP: encryption DES-CBC
ISAKMP: hash MD5
ISAKMP: default group 1
ISAKMP: auth pre-share
ISAKMP (0): atts are acceptable. Next payload is 0
ISAKMP (0): SA is doing pre-shared key authentication 
using id type ID_IPV4_ADDR
return status is IKMP_NO_ERROR
crypto_isakmp_process_block:src:209.168.202.229, 
dest:209.168.201.70 spt:500 dpt:500
OAK_MM exchange
ISAKMP (0): processing KE payload. message ID = 0

ISAKMP (0): processing NONCE payload. message ID = 0

ISAKMP (0): processing vendor id payload

ISAKMP (0): processing vendor id payload

ISAKMP (0): received xauth v6 vendor id

return status is IKMP_NO_ERROR
crypto_isakmp_process_block:src:209.168.202.229, 
dest:209.168.201.70 spt:500 dpt:500
OAK_MM exchange
ISAKMP (0): processing ID payload. message ID = 0
ISAKMP (0): processing HASH payload. message ID = 0
ISAKMP (0): processing NOTIFY payload 24578 protocol 1
spi 0, message ID = 0
ISAKMP (0): processing notify INITIAL_CONTACTIPSEC(key_engine): 
got a queue event...
IPSEC(key_engine_delete_sas): rec'd delete notify from ISAKMP
IPSEC(key_engine_delete_sas): delete all SAs shared with 209.168.202.229

ISAKMP (0): SA has been authenticated

!--- Phase 1 is complete.

ISAKMP (0): ID payload
next-payload : 8
type : 1
protocol : 17
port : 500
length : 8
ISAKMP (0): Total payload length: 12
return status is IKMP_NO_ERROR
ISAKMP (0): sending phase 1 RESPONDER_LIFETIME notify
ISAKMP (0): sending NOTIFY message 24576 protocol 1
VPN Peer: ISAKMP: Added new peer: ip:209.168.202.229/500 Total VPN Peers:1
VPN Peer: ISAKMP: Peer ip:209.168.202.229/500 Ref cnt 
incremented to:1 Total VPN Peers:1
crypto_isakmp_process_block:src:209.168.202.229, 
dest:209.168.201.70 spt:500 dpt:500
OAK_QM exchange
ISAKMP (0:0): Need config/address

!--- Mode configuration.

ISAKMP (0:0): initiating peer config to 209.168.202.229. 
ID = 2521514930 (0x964b43b2)
return status is IKMP_NO_ERROR
crypto_isakmp_process_block:src:209.168.202.229, 
dest:209.168.201.70 spt:500 dpt:500
ISAKMP_TRANSACTION exchange
ISAKMP (0:0): processing transaction payload from 
209.168.202.229. message ID = 16133588
ISAKMP: Config payload CFG_ACK
ISAKMP (0:0): peer accepted the address!
return status is IKMP_NO_ERROR
crypto_isakmp_process_block:src:209.168.202.229, 
dest:209.168.201.70 spt:500 dpt:500
OAK_QM exchange
oakley_process_quick_mode:
OAK_QM_IDLE
ISAKMP (0): processing SA payload. message ID = 1524017329

ISAKMP : Checking IPSec proposal 1

ISAKMP: transform 1, ESP_DES
ISAKMP: attributes in transform:
ISAKMP: authenticator is HMAC-MD5
ISAKMP: encaps is 1

!--- Phase 2 starts.

ISAKMP (0): atts are acceptable.IPSEC(validate_proposal_request): 
proposal part #1,
(key eng. msg.) dest= 209.168.201.70, src= 209.168.202.229, 
dest_proxy= 192.168.10.0/255.255.255.0/0/0 (type=4), 
src_proxy= 172.16.1.1/255.255.255.255/0/0 (type=1),
protocol= ESP, transform= esp-des esp-md5-hmac , 
lifedur= 0s and 0kb, 
spi= 0x0(0), conn_id= 0, keysize= 0, flags= 0x4

ISAKMP (0): processing NONCE payload. message ID = 1524017329

ISAKMP (0): processing ID payload. message ID = 1524017329
ISAKMP (0): ID_IPV4_ADDR src 172.16.1.1 prot 0 port 0
ISAKMP (0): processing ID payload. message ID = 1524017329
ISAKMP (0): ID_IPV4_ADDR_SUBNET dst 192.168.10.0/255.255.255.0 prot 0 port 
0IPSEC(key_engine): got a queue event...
IPSEC(spi_response): getting spi 0x9f068383(2668004227) for SA 
from 209.168.202.229 to 209.168.201.70 for prot 3

return status is IKMP_NO_ERROR
crypto_isakmp_process_block:src:209.168.202.229, 
dest:209.168.201.70 spt:500 dpt:500
OAK_QM exchange
oakley_process_quick_mode:
OAK_QM_AUTH_AWAIT

!--- Phase 2 complete IPSec SAs are created.

ISAKMP (0): Creating IPSec SAs
inbound SA from 209.168.202.229 to 209.168.201.70 
(proxy 172.16.1.1 to 192.168.10.0)
has spi 2668004227 and conn_id 2 and flags 4
outbound SA from 209.168.201.70 to 209.168.202.229 
(proxy 192.168.10.0 to 172.16.1.1)
has spi 3326135849 and conn_id 1 and flags 4IPSEC
(key_engine): got a queue event...
IPSEC(initialize_sas): ,
(key eng. msg.) dest= 209.168.201.70, src= 209.168.202.229, 
dest_proxy= 192.168.10.0/255.255.255.0/0/0 (type=4), 
src_proxy= 172.16.1.1/0.0.0.0/0/0 (type=1),
protocol= ESP, transform= esp-des esp-md5-hmac , 
lifedur= 0s and 0kb, 
spi= 0x9f068383(2668004227), conn_id= 2, keysize= 0, flags= 0x4
IPSEC(initialize_sas): ,
(key eng. msg.) src= 209.168.201.70, dest= 209.168.202.229, 
src_proxy= 192.168.10.0/255.255.255.0/0/0 (type=4), 
dest_proxy= 172.16.1.1/0.0.0.0/0/0 (type=1),
protocol= ESP, transform= esp-des esp-md5-hmac , 
lifedur= 0s and 0kb, 
spi= 0xc640ce29(3326135849), conn_id= 1, keysize= 0, flags= 0x4

VPN Peer: IPSEC: Peer ip:209.168.202.229/500 Ref cnt 
incremented to:2 Total VPN Peers:1
VPN Peer: IPSEC: Peer ip:209.168.202.229/500 Ref cnt 
incremented to:3 Total VPN Peers:1
return status is IKMP_NO_ERROR
sv2-5# 

相關資訊

• IPSec支援頁面
• IPSec簡介
• 通過Cisco PIX防火牆建立連線
• PIX命令參考
• PIX支援頁
• 要求建議 (RFC)
• 技術支援 - Cisco Systems