需求很简单，中间的R代表互联网（公网），企业场景1总部对三分部，用过防火墙进行ipsec vpn点到多点部署。

解题思路，只要是会ipsec vpn的点到点，既可以做出点到多点实验效果。

该场景适用于点到多点的毕设、大作业、课程等场景，该拓扑只不过是把各公司内网简化成一台pc，同学们要有举一反三的能力

不要质疑我答案的正确性，我百分百保证，你照着敲大概率也会做不通，要具有排障能力。

R配置

#
sysname R
#
undo info-center enable
#
interface GigabitEthernet0/0/0
 ip address 100.1.21.2 255.255.255.252 
#
interface GigabitEthernet0/0/1
 ip address 100.1.22.2 255.255.255.252 
#
interface GigabitEthernet0/0/2
 ip address 100.1.23.2 255.255.255.252 
#
interface GigabitEthernet0/0/3
 ip address 100.1.24.2 255.255.255.252 

FW1配置：
sysname FW1
#
acl number 3000
 rule 1 permit ip source 172.16.10.0 0.0.0.255 destination 192.168.20.0 0.0.0.255 
acl number 3001
 rule 1 permit ip source 172.16.10.0 0.0.0.255 destination 192.168.30.0 0.0.0.255  
acl number 3002
 rule 1 permit ip source 172.16.10.0 0.0.0.255 destination 192.168.40.0 0.0.0.255 
#
ipsec proposal tran1
 esp authentication-algorithm sha1 
 esp encryption-algorithm aes-256 
#
ike proposal 10
 encryption-algorithm aes-256 
 dh group2 
 authentication-algorithm sha1 
 authentication-method pre-share
 integrity-algorithm hmac-sha2-256 
 prf hmac-sha2-256 
#
ike peer f2
 pre-shared-key 18812668402
 ike-proposal 10
 remote-address 100.1.22.1 
ike peer f3
 pre-shared-key 18812668402
 ike-proposal 10
 remote-address 100.1.23.1 
ike peer f4
 pre-shared-key 18812668402
 ike-proposal 10
 remote-address 100.1.24.1 
#
ipsec policy ips 1 isakmp
 security acl 3000
 ike-peer f2
 proposal tran1
ipsec policy ips 2 isakmp
 security acl 3001
 ike-peer f3
 proposal tran1
ipsec policy ips 3 isakmp
 security acl 3002
 ike-peer f4
 proposal tran1
#
interface GigabitEthernet1/0/0
 undo shutdown
 ip address 100.1.21.1 255.255.255.252
 service-manage ping permit
 ipsec policy ips
#
interface GigabitEthernet1/0/1
 undo shutdown
 ip address 172.16.10.2 255.255.255.0
 service-manage ping permit
#
firewall zone trust
 add interface GigabitEthernet1/0/1
#
firewall zone untrust
 add interface GigabitEthernet1/0/0
#
ip route-static 0.0.0.0 0.0.0.0 100.1.21.2
#
security-policy
 rule name L-U
  source-zone local
  source-zone untrust
  destination-zone local
  destination-zone untrust
  action permit
 rule name f-f4
  source-zone trust
  destination-zone untrust
  source-address 172.16.10.0 mask 255.255.255.0
  destination-address 192.168.40.0 mask 255.255.255.0
  action permit
 rule name f4-f
  source-zone untrust
  destination-zone dmz
  destination-zone trust
  source-address 192.168.40.0 mask 255.255.255.0
  destination-address 172.16.10.0 mask 255.255.255.0
  action permit
 rule name f-f2
  source-zone trust
  destination-zone untrust
  source-address 172.16.10.0 mask 255.255.255.0
  destination-address 192.168.20.0 mask 255.255.255.0
  action permit
 rule name f2-f
  source-zone untrust
  destination-zone dmz
  destination-zone trust
  source-address 192.168.20.0 mask 255.255.255.0
  destination-address 172.16.10.0 mask 255.255.255.0
  action permit
 rule name f-f3
  source-zone trust
  destination-zone untrust
  source-address 172.16.10.0 mask 255.255.255.0
  destination-address 192.168.30.0 mask 255.255.255.0
  action permit
 rule name f3-f
  source-zone untrust
  destination-zone dmz
  destination-zone trust
  source-address 192.168.30.0 mask 255.255.255.0
  destination-address 172.16.10.0 mask 255.255.255.0
  action permit
 rule name f-isp
  source-zone trust
  destination-zone untrust
  source-address 172.16.10.0 mask 255.255.255.0
  action permit
#
nat-policy
 rule name z-f234
  source-zone trust
  destination-zone untrust
  source-address 172.16.10.0 mask 255.255.255.0
  destination-address 192.168.40.0 mask 255.255.255.0
  destination-address 192.168.20.0 mask 255.255.255.0
  destination-address 192.168.30.0 mask 255.255.255.0
  action no-nat
 rule name any-isp
  source-zone trust
  destination-zone untrust
  source-address 172.16.10.0 mask 255.255.255.0
  action source-nat easy-ip

fw2配置

sysname FW2
#
acl number 3000
 rule 5 permit ip source 192.168.20.0 0.0.0.255 destination 172.16.10.0 0.0.0.255  
#
ipsec proposal tran1
 esp authentication-algorithm sha1 
 esp encryption-algorithm aes-256 
#
ike proposal 10
 encryption-algorithm aes-256 
 dh group2 
 authentication-algorithm sha1 
 authentication-method pre-share
 integrity-algorithm hmac-sha2-256 
 prf hmac-sha2-256 
#
ike peer f
 pre-shared-key 18812668402
 ike-proposal 10
 remote-address 100.1.21.1 
#
ipsec policy map1 1 isakmp
 security acl 3000
 ike-peer f
 proposal tran1
#
interface GigabitEthernet1/0/0
 undo shutdown
 ip address 192.168.20.254 255.255.255.0
 service-manage ping permit
#
interface GigabitEthernet1/0/1
 undo shutdown
 ip address 100.1.22.1 255.255.255.252
 service-manage ping permit
 ipsec policy map1
#
firewall zone trust
 add interface GigabitEthernet1/0/0
#
firewall zone untrust
 add interface GigabitEthernet1/0/1
#
ip route-static 0.0.0.0 0.0.0.0 100.1.22.2
#
security-policy
 rule name L-U
  source-zone local
  source-zone untrust
  destination-zone local
  destination-zone untrust
  action permit
 rule name f2-f
  source-zone trust
  destination-zone untrust
  source-address 192.168.20.0 mask 255.255.255.0
  destination-address 172.16.10.0 mask 255.255.255.0
  action permit
 rule name f-f2
  source-zone untrust
  destination-zone trust
  source-address 172.16.10.0 mask 255.255.255.0
  destination-address 192.168.20.0 mask 255.255.255.0
  action permit
 rule name f2-isp
  source-zone trust
  destination-zone untrust
  source-address 192.168.20.0 mask 255.255.255.0
  action permit
#
nat-policy
 rule name f2-f
  source-zone trust
  destination-zone untrust
  source-address 192.168.20.0 mask 255.255.255.0
  destination-address 172.16.10.0 mask 255.255.255.0
  action no-nat
 rule name f2-isp
  source-zone trust
  destination-zone untrust
  source-address 192.168.20.0 mask 255.255.255.0
  action source-nat easy-ip

fw3配置

sysname FW3 
#
acl number 3000
 rule 5 permit ip source 192.168.30.0 0.0.0.255 destination 172.16.10.0 0.0.0.255 

#
ipsec proposal tran1
 esp authentication-algorithm sha1 
 esp encryption-algorithm aes-256 
#
ike proposal 10
 encryption-algorithm aes-256 
 dh group2 
 authentication-algorithm sha1 
 authentication-method pre-share
 integrity-algorithm hmac-sha2-256 
 prf hmac-sha2-256 
#
ike peer f
 pre-shared-key 18812668402
 ike-proposal 10
 remote-address 100.1.21.1
#
ipsec policy map1 1 isakmp
 security acl 3000
 ike-peer f
 proposal tran1
#
interface GigabitEthernet1/0/0
 undo shutdown
 ip address 192.168.30.254 255.255.255.0
 service-manage ping permit
#
interface GigabitEthernet1/0/1
 undo shutdown
 ip address 100.1.23.1 255.255.255.252
 service-manage ping permit
 ipsec policy map1
#
firewall zone trust
 add interface GigabitEthernet1/0/0
#
firewall zone untrust
 add interface GigabitEthernet1/0/1
#
ip route-static 0.0.0.0 0.0.0.0 100.1.23.2
#
security-policy
 rule name L-U
  source-zone local
  source-zone untrust
  destination-zone local
  destination-zone untrust
  action permit
 rule name f3-f
  source-zone trust
  destination-zone untrust
  source-address 192.168.30.0 mask 255.255.255.0
  destination-address 172.16.10.0 mask 255.255.255.0
  action permit
 rule name f-f3
  source-zone untrust
  destination-zone trust
  source-address 172.16.10.0 mask 255.255.255.0
  destination-address 192.168.30.0 mask 255.255.255.0
  action permit
 rule name f3-isp
  source-zone trust
  destination-zone untrust
  source-address 192.168.30.0 mask 255.255.255.0
  action permit
#
nat-policy
 rule name f3-f
  source-zone trust
  destination-zone untrust
  source-address 192.168.30.0 mask 255.255.255.0
  destination-address 172.16.10.0 mask 255.255.255.0
  action no-nat
 rule name f3-isp
  source-zone trust
  destination-zone untrust
  source-address 192.168.30.0 mask 255.255.255.0
  action source-nat easy-ip


sysname FW4
#
acl number 3000
 rule 5 permit ip source 192.168.40.0 0.0.0.255 destination 172.16.10.0 0.0.0.255  
#
ipsec proposal tran1
 esp authentication-algorithm sha1 
 esp encryption-algorithm aes-256 
#
ike proposal 10
 encryption-algorithm aes-256 
 dh group2 
 authentication-algorithm sha1 
 authentication-method pre-share
 integrity-algorithm hmac-sha2-256 
 prf hmac-sha2-256 
#
ike peer f
 pre-shared-key 18812668402
 ike-proposal 10
 remote-address 100.1.21.1 
#
ipsec policy map1 1 isakmp
 security acl 3000
 ike-peer f
 proposal tran1
#
interface GigabitEthernet1/0/0
 undo shutdown
 ip address 192.168.40.254 255.255.255.0
 service-manage ping permit
#
interface GigabitEthernet1/0/1
 undo shutdown
 ip address 100.1.24.1 255.255.255.252
 service-manage ping permit
 ipsec policy map1
#
firewall zone trust
 add interface GigabitEthernet1/0/0
#
firewall zone untrust
 add interface GigabitEthernet1/0/1
#
ip route-static 0.0.0.0 0.0.0.0 100.1.24.2
#
security-policy
 rule name L-U
  source-zone local
  source-zone untrust
  destination-zone local
  destination-zone untrust
  action permit
 rule name f4-f
  source-zone trust
  destination-zone untrust
  source-address 192.168.40.0 mask 255.255.255.0
  destination-address 172.16.10.0 mask 255.255.255.0
  action permit
 rule name f-f4
  source-zone untrust
  destination-zone trust
  source-address 172.16.10.0 mask 255.255.255.0
  destination-address 192.168.40.0 mask 255.255.255.0
  action permit
 rule name f4-isp
  source-zone trust
  destination-zone untrust
  source-address 192.168.40.0 mask 255.255.255.0
  action permit
#
nat-policy
 rule name f4-f
  source-zone trust
  destination-zone untrust
  source-address 192.168.40.0 mask 255.255.255.0
  destination-address 172.16.10.0 mask 255.255.255.0
  action no-nat
 rule name f4-isp
  source-zone trust
  destination-zone untrust
  source-address 192.168.40.0 mask 255.255.255.0
  action source-nat easy-ip

杜绝拿着配置复制粘贴，不通就来质疑我的答案，真是可笑！！！

测试总部防火墙到三台防火墙的建立ike隧道的接口地址连通性

连通性正常后，ping各个分部的业务，观察ike sa 和ipsec sa

初次完成全补配置后，测试过程中均丢2个包，丢包为arp的过程，真机不会

ike sa 对等体有三对儿

ipsec sa 的摘要信息也是3对儿

ipsec sa 可以看到你出方向的加密流量

细心的同学可以反复查看该命令，你会发现每次ping后，进出加密流量是增长过程

下课！

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