PIX/ASA 7.x动态IOS路由器和静态PIX之间的动态IPSec配置示例

防火墙版本PIX/ASA 7.x，网络拓扑如下

route

Router#show running-config
Current configuration : 1354 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname Router
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
!
resource policy
!
ip cef


!--- Configuration for IKE policies. !--- Enables the IKE policy configuration (config-isakmp) !--- command mode, where you can specify the parameters that !--- are used during an IKE negotiation.


crypto isakmp policy 1
 encr 3des
 hash md5
 authentication pre-share
 group 2


!--- Specifies the preshared key "cisco123" which should !--- be identical at both peers. This is a global !--- configuration mode command.


crypto isakmp key cisco123 address 192.168.1.2
!
!

!--- Configuration for IPsec policies. !--- Enables the crypto transform configuration mode, !--- where you can specify the transform sets that are used !--- during an IPsec negotiation.


crypto ipsec transform-set pix-set esp-3des esp-md5-hmac


!--- Indicates that IKE is used to establish !--- the IPsec Security Association for protecting the !--- traffic specified by this crypto map entry.


crypto map pix 10 ipsec-isakmp


!--- Sets the IP address of the remote end.


 set peer 192.168.1.2


!--- Configures IPsec to use the transform-set !--- "pix-set" defined earlier in this configuration.


 set transform-set pix-set


!--- Specifies the interesting traffic to be encrypted.


 match address 101
!
!
!
!
interface Ethernet0/0

!--- The interface dynamically learns its IP address !--- from the service provider.


 ip address DHCP

 ip virtual-reassembly
 half-duplex

!--- Configures the interface to use the !--- crypto map "pix" for IPsec.

 crypto map pix
!
interface FastEthernet1/0
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface Serial2/0
 ip address 10.1.1.2 255.255.255.0
 ip nat inside
 ip virtual-reassembly
 no fair-queue
!
interface Serial2/1
 no ip address
 shutdown
!
interface Serial2/2
 no ip address
 shutdown
!
interface Serial2/3
 no ip address
 shutdown
!
ip http server
no ip http secure-server
!
ip route 0.0.0.0 0.0.0.0 Ethernet0/0
!
ip nat inside source route-map nonat interface Ethernet0/0 overload
!

!--- This crypto ACL 101 -permit identifies the !--- matching traffic flows to be protected via encryption.


access-list 101 permit ip 10.1.1.0 0.0.0.255 10.2.2.0 0.0.0.255


!--- This ACL 110 identifies the traffic flows using route map and !--- are PATed via outside interface (Ethernet0/0).


access-list 110 deny ip 10.1.1.0 0.0.0.255 10.2.2.0 0.0.0.255
access-list 110 permit ip 10.1.1.0 0.0.0.255 any


!
route-map nonat permit 10
 match ip address 110
!
!
control-plane
!

!
line con 0
line aux 0
line vty 0 4
!
!
end

pix7.x

pixfirewall#show running-config
 PIX Version 7.2(1)
!
hostname pixfirewall
enable password 8Ry2YjIyt7RRXU24 encrypted
names
!

!--- Configure the outside and inside interfaces.

interface Ethernet0
 nameif outside
 security-level 0
 ip address 192.168.1.2 255.255.255.0
!
interface Ethernet1
 nameif inside
 security-level 100
 ip address 10.2.2.1 255.255.255.0
!
!

 !--- Output is suppressed.

!
passwd 2KFQnbNIdI.2KYOU encrypted
ftp mode passive


!--- This access list is used for a nat zero command that prevents !--- traffic which matches the access list from undergoing NAT.


access-list nonat extended permit ip 10.2.2.0 255.255.255.0 10.1.1.0 255.255.255.0

pager lines 24
mtu outside 1500
mtu inside 1500
no failover
no asdm history enable
arp timeout 14400


 !--- NAT 0 prevents NAT for networks specified in the ACL - nonat. !--- The nat 1 command specifies PAT using !--- the outside interface for all other traffic.


global (outside) 1 interface
nat (inside) 0 access-list nonat
nat (inside) 1 0.0.0.0 0.0.0.0

route outside 0.0.0.0 0.0.0.0 192.168.1.1 1

timeout xlate 3:00:00
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 icmp 0:00:02
timeout sunrpc 0:10:00 h323 0:05:00 h225 1:00:00 mgcp 0:05:00 mgcp-pat 0:05:00
timeout sip 0:30:00 sip_media 0:02:00 sip-invite 0:03:00 sip-disconnect 0:02:00
timeout uauth 0:05:00 absolute
no snmp-server location
no snmp-server contact
snmp-server enable traps snmp authentication linkup linkdown coldstart


!--- PHASE 2 CONFIGURATION ---! !--- The encryption types for Phase 2 are defined here. !--- A triple single 3DES encryption with !--- the md5 hash algorithm is used.


crypto ipsec transform-set router-set esp-3des esp-md5-hmac


!--- Defines a dynamic crypto map with !--- the specified encryption settings.


crypto dynamic-map cisco 1 set transform-set router-set


!--- Enable Reverse Route Injection (RRI), which allows the Security Appliance !--- to learn routing information for connected clients.


crypto dynamic-map cisco 1 set reverse-route


!--- Binds the dynamic map to the IPsec/ISAKMP process.


crypto map dyn-map 10 ipsec-isakmp dynamic cisco


!--- Specifies the interface to be used with !--- the settings defined in this configuration.


crypto map dyn-map interface outside


!--- PHASE 1 CONFIGURATION ---! !--- This configuration uses isakmp policy 10. !--- Policy 65535 is included in the config by default. !--- The configuration commands here define the Phase !--- 1 policy parameters that are used.

crypto isakmp policy 10
 authentication pre-share
 encryption 3des
 hash md5
 group 2
 lifetime 86400

crypto isakmp policy 65535
 authentication pre-share
 encryption 3des
 hash sha
 group 2
 lifetime 86400

!--- The security appliance provides the default tunnel groups !--- for Lan to Lan access (DefaultL2LGroup) and configure the preshared key !--- (cisco123) to authenticate the remote router.


tunnel-group DefaultL2LGroup ipsec-attributes
 pre-shared-key *

telnet timeout 5
ssh timeout 5
console timeout 0
!
class-map inspection_default
 match default-inspection-traffic
!
!
policy-map type inspect dns preset_dns_map
 parameters
  message-length maximum 512
policy-map global_policy
 class inspection_default
  inspect dns preset_dns_map
  inspect ftp
  inspect h323 h225
  inspect h323 ras
  inspect netbios
  inspect rsh
  inspect rtsp
  inspect skinny
  inspect esmtp
  inspect sqlnet
  inspect sunrpc
  inspect tftp
  inspect sip
  inspect xdmcp
!
service-policy global_policy global
prompt hostname context
Cryptochecksum:6ed4a7bce392a439d0a16e86743e2663

清除安全关联 (SA)

在 PIX 的特权模式下使用以下这些命令：

clear [crypto] ipsec sa - 删除活动 IPsec SA。关键字 crypto 是可选的。

clear [crypto] isakmp sa - 删除活动 IKE SA。关键字 crypto 是可选的。
show crypto isakmp sa
show crypto ipsec sa
PIX 安全设备 - debug 输出

debug crypto ipsec 7 - 显示第 2 阶段的 IPsec 协商。

debug crypto isakmp 7 - 显示第 1 阶段的 ISAKMP 协商。

远程 IOS 路由器 - debug 输出

debug crypto ipsec - 显示第 2 阶段的 IPsec 协商。

debug crypto isakmp - 显示第 1 阶段的 ISAKMP 协商。