PIX 6.x: IPsec dinâmico entre um PIX Firewall estaticamente endereçado e o IOS Router dinamicamente endereçado com exemplo da configuração de NAT

Building configuration...
: Saved
:
PIX Version 6.3(1)
nameif ethernet0 outside security0
nameif ethernet1 inside security100
nameif ethernet2 intf2 security10
enable password 8Ry2YjIyt7RRXU24 encrypted
passwd 2KFQnbNIdI.2KYOU encrypted
hostname elf
fixup protocol ftp 21
fixup protocol http 80
fixup protocol h323 1720
fixup protocol rsh 514
fixup protocol rtsp 554
fixup protocol smtp 25
fixup protocol sqlnet 1521
fixup protocol sip 5060
fixup protocol skinny 2000
names

!--- Access control list (ACL) to avoid NAT on the IPsec packets.

access-list nonat permit ip 192.168.1.0 255.255.255.0 10.1.1.0 255.255.255.0
pager lines 24
logging on
logging buffered debugging
interface ethernet0 auto
interface ethernet1 auto
interface ethernet2 auto shutdown
mtu outside 1500
mtu inside 1500
mtu intf2 1500
ip address outside 172.18.124.2 255.255.255.0
ip address inside 192.168.1.1 255.255.255.0
ip address intf2 127.0.0.1 255.255.255.255
ip audit info action alarm
ip audit attack action alarm
no failover
failover timeout 0:00:00
failover poll 15
failover ip address outside 0.0.0.0
failover ip address inside 0.0.0.0
failover ip address intf2 0.0.0.0
pdm history enable
arp timeout 14400
global (outside) 1 interface

!-- Binds ACL nonat to the NAT statement to avoid NAT on the IPsec packets

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

!--- Permits Internet Control Message Protocol (ICMP) traffic for testing. !--- Do not enable it in a live network.

conduit permit icmp any any
route outside 0.0.0.0 0.0.0.0 172.18.124.1 1
timeout xlate 3:00:00
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 rpc 0:10:00 
h323 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 tacacs+
no snmp-server location
no snmp-server contact
snmp-server community public
no snmp-server enable traps
floodguard enable
sysopt connection permit-ipsec
no sysopt route dnat

!--- IPsec configuration

crypto ipsec transform-set router-set esp-des esp-md5-hmac
crypto dynamic-map cisco 1 set transform-set router-set
crypto map dyn-map 10 ipsec-isakmp dynamic cisco
crypto map dyn-map interface outside
isakmp enable outside

!--- Internet Security Association and Key Management Protocol (ISAKMP) !--- policy for accepting dynamic connections from remote PIX. !--- Note: In real show run output, the pre-shared key appears as *******.

isakmp key cisco123 address 0.0.0.0 netmask 0.0.0.0
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
terminal width 80
Cryptochecksum:eeb67d5df47045f7e6ac4aa090aab683
: end
[OK]
elf#

mop#show running-configuration
Building configuration...

Current configuration : 1916 bytes
!
version 12.4
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname mop
!
!
ip subnet-zero
!
!
no ip domain-lookup
!
ip cef
ip audit notify log
ip audit po max-events 100
!

!--- Internet Key Exchange (IKE) policies

crypto isakmp policy 1
 hash md5
 authentication pre-share
crypto isakmp key cisco123 address 172.18.124.2
!
!

!--- IPsec policies

crypto ipsec transform-set pix-set esp-des esp-md5-hmac
!
crypto map pix 10 ipsec-isakmp
 set peer 172.18.124.2
 set transform-set pix-set
 match address 101
!
interface FastEthernet0/0
 no ip address
 shutdown
 duplex half
!
interface Ethernet1/0
ip address dhcp
ip nat outside
duplex half
crypto map pix
!
interface Ethernet1/1
ip address 10.1.1.1 255.255.255.0
ip nat inside
duplex half
!

!--- Except the private network from the NAT process.

ip nat inside source route-map nonat interface Ethernet1/0 overload
ip classless
ip route 0.0.0.0 0.0.0.0 Ethernet1/0
no ip http server
ip pim bidir-enable
!

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

access-list 101 permit ip 10.1.1.0 0.0.0.255 192.168.1.0 0.0.0.255

!--- Except the private network from the NAT process.

access-list 110 deny ip 10.1.1.0 0.0.0.255 192.168.1.0 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
!
line con 0
 exec-timeout 0 0
line aux 0
line vty 0 4
 login
!
!
end