1、网络拓扑图
2、IPSEC重要知识点
1）IPSEC SA，由一个三元组来唯一标识：安全参数索引SPI（Security Parameter Index）、目的IP地址和使用的安全协议号（AH或ESP）。其中，SPI是唯一标识SA而生成的一个32位比特的数值，它被封装在AH和ESP头部。
2）IPSec使用认证头AH（Authentication Header）和封装安全载荷ESP（Encapsulating Security Payload）两种IP传输层协议来提供认证或加密等安全服务。
3）传输模式和隧道模式比较
传输模式和隧道模式的区别在于：
- 从安全性来讲，隧道模式优于传输模式。它可以完全地对原始IP数据报进行验证和加密。隧道模式下可以隐藏内部IP地址，协议类型和端口。
- 从性能来讲，隧道模式因为有一个额外的IP头，所以它将比传输模式占用更多带宽。
- 从场景来讲，传输模式主要应用于两台主机或一台主机和一台VPN网关之间通信；隧道模式主要应用于两台VPN网关之间或一台主机与一台VPN网关之间的通信。
当安全协议同时采用AH和ESP时，AH和ESP协议必须采用相同的封装模式。
3、IPSEC配置
R1:
[R1]display current-configuration
[V200R003C00]
#
sysname R1
#
snmp-agent local-engineid 800007DB03000000000000
snmp-agent
#
clock timezone China-Standard-Time minus 08:00:00
#
portal local-server load portalpage.zip
#
drop illegal-mac alarm
#
set cpu-usage threshold 80 restore 75
#
aaa
authentication-scheme default
authorization-scheme default
accounting-scheme default
domain default
domain default_admin
local-user admin password cipher %$%$K8m.Nt84DZ}e#<0`8bmE3Uw}%$%$
local-user admin service-type http
#
firewall zone Local
priority 15
#
interface GigabitEthernet0/0/0
ip address 192.168.1.1 255.255.255.0
#
interface GigabitEthernet0/0/1
ip address 10.1.1.1 255.255.255.0
#
interface GigabitEthernet0/0/2
#
interface NULL0
#
ospf 100 router-id 1.1.1.1
import-route static
area 0.0.0.0
network 10.1.1.0 0.0.0.255
network 192.168.1.0 0.0.0.255
#
ip route-static 172.16.1.0 255.255.255.0 GigabitEthernet0/0/1 10.1.1.2//远端的路由
#
user-interface con 0
authentication-mode password
idle-timeout 0 0
user-interface vty 0 4
user-interface vty 16 20
#
wlan ac
#
return
[R1]
R2:
[r2]display current-configuration
[V200R003C00]
#
sysname r2
#
snmp-agent local-engineid 800007DB03000000000000
snmp-agent
#
clock timezone China-Standard-Time minus 08:00:00
#
portal local-server load portalpage.zip
#
drop illegal-mac alarm
#
set cpu-usage threshold 80 restore 75
#
acl number 3000
rule 10 permit ip source 192.168.1.0 0.0.0.255 destination 172.16.1.0 0.0.0.255
#
ipsec proposal 2to4
#
ipsec policy test 100 manual
security acl 3000
proposal 2to4
tunnel local 20.1.1.1
tunnel remote 30.1.1.2
sa spi inbound esp 12345
sa string-key inbound esp cipher %$%$u`Vj70TpB0@>_K8vu71O,.2n%$%$
sa spi outbound esp 54321
sa string-key outbound esp cipher %$%$}qY[IWU7cAugi7#,j+l;,.2n%$%$
#
aaa
authentication-scheme default
authorization-scheme default
accounting-scheme default
domain default
domain default_admin
local-user admin password cipher %$%$K8m.Nt84DZ}e#<0`8bmE3Uw}%$%$
local-user admin service-type http
#
firewall zone Local
priority 15
#
interface GigabitEthernet0/0/0
ip address 10.1.1.2 255.255.255.0
#
interface GigabitEthernet0/0/1
ip address 20.1.1.1 255.255.255.0
ipsec policy test
#
interface GigabitEthernet0/0/2
#
interface NULL0
#
ospf 100 router-id 2.2.2.2
import-route direct
area 0.0.0.0
network 10.1.1.0 0.0.0.255
#
ip route-static 0.0.0.0 0.0.0.0 GigabitEthernet0/0/1 20.1.1.2
#
user-interface con 0
authentication-mode password
idle-timeout 0 0
user-interface vty 0 4
user-interface vty 16 20
#
wlan ac
#
return
[r2]
R3:
<r3>display current-configuration
[V200R003C00]
#
sysname r3
#
snmp-agent local-engineid 800007DB03000000000000
snmp-agent
#
clock timezone China-Standard-Time minus 08:00:00
#
portal local-server load portalpage.zip
#
drop illegal-mac alarm
#
set cpu-usage threshold 80 restore 75
#
aaa
authentication-scheme default
authorization-scheme default
accounting-scheme default
domain default
domain default_admin
local-user admin password cipher %$%$K8m.Nt84DZ}e#<0`8bmE3Uw}%$%$
local-user admin service-type http
#
firewall zone Local
priority 15
#
interface GigabitEthernet0/0/0
ip address 20.1.1.2 255.255.255.0
#
interface GigabitEthernet0/0/1
ip address 30.1.1.1 255.255.255.0
#
interface GigabitEthernet0/0/2
#
interface NULL0
#
user-interface con 0
authentication-mode password
user-interface vty 0 4
user-interface vty 16 20
#
wlan ac
#
return
<r3>
R4:
[r4]display current-configuration
[V200R003C00]
#
sysname r4
#
snmp-agent local-engineid 800007DB03000000000000
snmp-agent
#
clock timezone China-Standard-Time minus 08:00:00
#
portal local-server load portalpage.zip
#
drop illegal-mac alarm
#
set cpu-usage threshold 80 restore 75
#
acl number 3001
rule 10 permit ip source 172.16.1.0 0.0.0.255 destination 192.168.1.0 0.0.0.255
#
ipsec proposal 4to2
#
ipsec policy test 100 manual
security acl 3001
proposal 4to2
tunnel local 30.1.1.2
tunnel remote 20.1.1.1
sa spi inbound esp 54321
sa string-key inbound esp cipher %$%$}qY[IWU7cAugi7#,j+l;,.2n%$%$
sa spi outbound esp 12345
sa string-key outbound esp cipher %$%$u`Vj70TpB0@>_K8vu71O,.2n%$%$
#
aaa
authentication-scheme default
authorization-scheme default
accounting-scheme default
domain default
domain default_admin
local-user admin password cipher %$%$K8m.Nt84DZ}e#<0`8bmE3Uw}%$%$
local-user admin service-type http
#
firewall zone Local
priority 15
#
interface GigabitEthernet0/0/0
ip address 30.1.1.2 255.255.255.0
ipsec policy test
#
interface GigabitEthernet0/0/1
ip address 40.1.1.1 255.255.255.0
#
interface GigabitEthernet0/0/2
#
interface NULL0
#
ospf 100 router-id 4.4.4.4
import-route direct
area 0.0.0.0
network 40.1.1.0 0.0.0.255
#
ip route-static 0.0.0.0 0.0.0.0 GigabitEthernet0/0/0 30.1.1.1
#
user-interface con 0
authentication-mode password
idle-timeout 0 0
user-interface vty 0 4
user-interface vty 16 20
#
wlan ac
#
return
[r4]
R5:
[r5]display current-configuration
[V200R003C00]
#
sysname r5
#
snmp-agent local-engineid 800007DB03000000000000
snmp-agent
#
clock timezone China-Standard-Time minus 08:00:00
#
portal local-server load portalpage.zip
#
drop illegal-mac alarm
#
set cpu-usage threshold 80 restore 75
#
aaa
authentication-scheme default
authorization-scheme default
accounting-scheme default
domain default
domain default_admin
local-user admin password cipher %$%$K8m.Nt84DZ}e#<0`8bmE3Uw}%$%$
local-user admin service-type http
#
firewall zone Local
priority 15
#
interface GigabitEthernet0/0/0
ip address 40.1.1.2 255.255.255.0
#
interface GigabitEthernet0/0/1
ip address 172.16.1.1 255.255.255.0
#
interface GigabitEthernet0/0/2
#
interface NULL0
#
ospf 100 router-id 5.5.5.5
import-route static
area 0.0.0.0
network 40.1.1.0 0.0.0.255
network 172.16.1.0 0.0.0.255
#
ip route-static 192.168.1.0 255.255.255.0 GigabitEthernet0/0/0 40.1.1.1//远端的ip地址
#
user-interface con 0
authentication-mode password
idle-timeout 0 0
user-interface vty 0 4
user-interface vty 16 20
#
wlan ac
#
return
[r5]
