动态IPSec的配置方法或者路由器跟防火墙配置动态IPSec的配置或者WEB配置

1.16.16  基于路由建立保护IPv4报文的IPsec隧道配置举例（预共享密钥认证方式）

1. 组网需求

如图1-25所示，某企业分支和总部均使用固定的IP地址接入Internet。现有如下组网要求：

·     企业分支与企业总部之间的所有流量通过IPsec安全隧道进行传送；

·     当企业分支的私网IP地址段调整时，不需要改变企业总部网关的IPsec配置。

为实现如上组网需求，可采用如下配置思路实现：

·     在Device A和Device B之间使用IPsec隧道接口建立IPsec连接，将发送给对端私网的数据流路由到IPsec虚拟隧道接口上，由IPsec虚拟隧道接口上动态协商建立的IPsec安全隧道对分支子网（10.1.1.0/24）与总部子网（10.1.2.0/24）之间的所有数据流进行安全保护。

2. 组网图

图1-25 基于IPsec隧道建立保护IPv4报文的IPsec隧道配置组网图

3. 配置Device A

(1)     配置接口IP地址

# 根据组网图中规划的信息，配置各接口的IP地址，具体配置步骤如下。

<DeviceA> system-view

[DeviceA] interface gigabitethernet 1/0/1

[DeviceA-GigabitEthernet1/0/1] ip address 10.1.1.1 255.255.255.0

[DeviceA-GigabitEthernet1/0/1] quit

请参考以上步骤配置其他接口的IP地址，具体配置步骤略。

(2)     创建IPsec隧道接口

[DeviceA] interface tunnel 1 mode ipsec

[DeviceA-Tunnel1] ip address 3.3.3.1 255.255.255.0

[DeviceA-Tunnel1] source 2.2.2.1

[DeviceA-Tunnel1] destination 2.2.3.1

[DeviceA-Tunnel1] quit

(3)     配置路由

本举例仅以静态路由方式配置路由信息。实际组网中，请根据具体情况选择相应的路由配置方式。

# 请根据组网图中规划的信息，配置静态路由，本举例假设下一跳IP地址为2.2.2.2，实际使用中请以具体组网情况为准，具体配置步骤如下。

[DeviceA] ip route-static 10.1.2.0 24 2.2.2.2

[DeviceA] ip route-static 2.2.3.1 24 2.2.2.2

# 请根据组网图中规划的信息，配置静态路由，将需要保护的流量引入IPsec隧道接口，本举例的IPsec隧道接口为Tunnel1，具体配置步骤如下。

[DeviceA] ip route-static 10.1.2.0 255.255.255.0 tunnel 1

(4)     配置接口加入安全域。

# 请根据组网图中规划的信息，将接口加入对应的安全域，具体配置步骤如下。

[DeviceA] security-zone name trust

[DeviceA-security-zone-Trust] import interface gigabitethernet 1/0/1

[DeviceA-security-zone-Trust] quit

[DeviceA] security-zone name untrust

[DeviceA-security-zone-Untrust] import interface gigabitethernet 1/0/2

[DeviceA-security-zone-Untrust] import interface tunnel 1

[DeviceA-security-zone-Untrust] quit

(5)     配置安全策略

a.     配置安全策略放行Untrust与Local安全域之间的流量，用于设备之间可以建立IPsec隧道。

# 配置名称为ipseclocalout的安全策规则，使Device A可以向Device B发送IPsec隧道协商报文，具体配置步骤如下。

[DeviceA] security-policy ip

[DeviceA-security-policy-ip] rule name ipseclocalout

[DeviceA-security-policy-ip-1-ipseclocalout] source-zone local

[DeviceA-security-policy-ip-1-ipseclocalout] destination-zone untrust

[DeviceA-security-policy-ip-1-ipseclocalout] source-ip-host 2.2.2.1

[DeviceA-security-policy-ip-1-ipseclocalout] destination-ip-host 2.2.3.1

[DeviceA-security-policy-ip-1-ipseclocalout] action pass

[DeviceA-security-policy-ip-1-ipseclocalout] quit

# 配置名称为ipseclocalin的安全策略规则，使Device A可以接收和处理来自Device B的IPsec隧道协商报文，具体配置步骤如下。

[DeviceA-security-policy-ip] rule name ipseclocalin

[DeviceA-security-policy-ip-2-ipseclocalin] source-zone untrust

[DeviceA-security-policy-ip-2-ipseclocalin] destination-zone local

[DeviceA-security-policy-ip-2-ipseclocalin] source-ip-host 2.2.3.1

[DeviceA-security-policy-ip-2-ipseclocalin] destination-ip-host 2.2.2.1

[DeviceA-security-policy-ip-2-ipseclocalin] action pass

[DeviceA-security-policy-ip-2-ipseclocalin] quit

b.     配置安全策略放行Host A与Host B之间的流量

# 配置名称为trust-untrust的安全策略规则，使Host A访问Host B的报文可通，具体配置步骤如下。

[DeviceA-security-policy-ip] rule name trust-untrust

[DeviceA-security-policy-ip-3-trust-untrust] source-zone trust

[DeviceA-security-policy-ip-3-trust-untrust] destination-zone untrust

[DeviceA-security-policy-ip-3-trust-untrust] source-ip-subnet 10.1.1.0 24

[DeviceA-security-policy-ip-3-trust-untrust] destination-ip-subnet 10.1.2.0 24

[DeviceA-security-policy-ip-3-trust-untrust] action pass

[DeviceA-security-policy-ip-3-trust-untrust] quit

# 配置名称为untrust-trust的安全策略规则，使Host B访问Host A的报文可通，具体配置步骤如下。

[DeviceA-security-policy-ip] rule name untrust-trust

[DeviceA-security-policy-ip-4-untrust-trust] source-zone untrust

[DeviceA-security-policy-ip-4-untrust-trust] destination-zone trust

[DeviceA-security-policy-ip-4-untrust-trust] source-ip-subnet 10.1.2.0 24

[DeviceA-security-policy-ip-4-untrust-trust] destination-ip-subnet 10.1.1.0 24

[DeviceA-security-policy-ip-4-untrust-trust] action pass

[DeviceA-security-policy-ip-4-untrust-trust] quit

[DeviceA-security-policy-ip] quit

(6)     配置IPsec安全框架，建立IPsec隧道，保护需要防护的数据流

[DeviceA] ike keychain abc

[DeviceA-ike-keychain-abc] pre-shared-key address 2.2.3.1 255.255.255.0 key simple 123456TESTplat&!

[DeviceA-ike-keychain-abc] quit

[DeviceA] ike profile abc

[DeviceA-ike-profile-abc] keychain abc

[DeviceA-ike-profile-abc] local-identity address 2.2.2.1

[DeviceA-ike-profile-abc] match remote identity address 2.2.3.1 24

[DeviceA-ike-profile-abc] exchange-mode aggressive

[DeviceA-ike-profile-abc] quit

[DeviceA] ipsec transform-set abc

[DeviceA-ipsec-transform-set-abc] esp encryption-algorithm aes-cbc-128

[DeviceA-ipsec-transform-set-abc] esp authentication-algorithm sha1

[DeviceA-ipsec-transform-set-abc] quit

[DeviceA] ipsec profile abc isakmp

[DeviceA-ipsec-profile-isakmp-abc] transform-set abc

[DeviceA-ipsec-profile-isakmp-abc] ike-profile abc

[DeviceA-ipsec-profile-isakmp-abc] quit

(7)     配置IPsec隧道接口，用于对需要保护的流量进行IPsec封装

[DeviceA] interface tunnel 1

[DeviceA-Tunnel1] tunnel protection ipsec profile abc

[DeviceA-Tunnel1] quit

4. 配置Device B

(1)     配置接口IP地址

# 根据组网图中规划的信息，配置各接口的IP地址，具体配置步骤如下。

<DeviceB> system-view

[DeviceB] interface gigabitethernet 1/0/1

[DeviceB-GigabitEthernet1/0/1] ip address 10.1.2.1 255.255.255.0

[DeviceB-GigabitEthernet1/0/1] quit

请参考以上步骤配置其他接口的IP地址，具体配置步骤略。

(2)     创建IPsec隧道接口

[DeviceB] interface tunnel 1 mode ipsec

[DeviceB-Tunnel1] ip address 3.3.3.2 255.255.255.0

[DeviceB-Tunnel1] source 2.2.3.1

[DeviceB-Tunnel1] destination 2.2.2.1

[DeviceB-Tunnel1] quit

(3)     配置路由

本举例仅以静态路由方式配置路由信息。实际组网中，请根据具体情况选择相应的路由配置方式。

# 请根据组网图中规划的信息，配置静态路由，本举例假设下一跳IP地址为2.2.3.2，实际使用中请以具体组网情况为准，具体配置步骤如下。

[DeviceB] ip route-static 10.1.1.0 24 2.2.3.2

[DeviceB] ip route-static 2.2.2.1 24 2.2.3.2

# 请根据组网图中规划的信息，配置静态路由，将需要保护的流量引入IPsec隧道接口，本举例的IPsec隧道接口为Tunnel1，具体配置步骤如下。

[DeviceA] ip route-static 10.1.1.0 255.255.255.0 tunnel 1

(4)     配置接口加入安全域。

# 请根据组网图中规划的信息，将接口加入对应的安全域，具体配置步骤如下。

[DeviceB] security-zone name trust

[DeviceB-security-zone-Trust] import interface gigabitethernet 1/0/1

[DeviceB-security-zone-Trust] quit

[DeviceB] security-zone name untrust

[DeviceB-security-zone-Untrust] import interface gigabitethernet 1/0/2

[DeviceA-security-zone-Untrust] import interface tunnel 1

[DeviceB-security-zone-Untrust] quit

(5)     配置安全策略

a.     配置安全策略放行Untrust与Local安全域之间的流量，用于设备之间可以建立IPsec隧道。

# 配置名称为ipseclocalout的安全策规则，使Device B可以向Device A发送IPsec隧道协商报文，具体配置步骤如下。

[DeviceB] security-policy ip

[DeviceB-security-policy-ip] rule name ipseclocalout

[DeviceB-security-policy-ip-1-ipseclocalout] source-zone local

[DeviceB-security-policy-ip-1-ipseclocalout] destination-zone untrust

[DeviceB-security-policy-ip-1-ipseclocalout] source-ip-host 2.2.3.1

[DeviceB-security-policy-ip-1-ipseclocalout] destination-ip-host 2.2.2.1

[DeviceB-security-policy-ip-1-ipseclocalout] action pass

[DeviceB-security-policy-ip-1-ipseclocalout] quit

# 配置名称为ipseclocalin的安全策略规则，使Device B可以接收和处理来自Device A的IPsec隧道协商报文，具体配置步骤如下。

[DeviceB-security-policy-ip] rule name ipseclocalin

[DeviceB-security-policy-ip-2-ipseclocalin] source-zone untrust

[DeviceB-security-policy-ip-2-ipseclocalin] destination-zone local

[DeviceB-security-policy-ip-2-ipseclocalin] source-ip-host 2.2.2.1

[DeviceB-security-policy-ip-2-ipseclocalin] destination-ip-host 2.2.3.1

[DeviceB-security-policy-ip-2-ipseclocalin] action pass

[DeviceB-security-policy-ip-2-ipseclocalin] quit

b.     配置安全策略放行Host B与Host A之间的流量

# 配置名称为trust-untrust的安全策略规则，使Host B访问Host A的报文可通，具体配置步骤如下。

[DeviceB-security-policy-ip] rule name trust-untrust

[DeviceB-security-policy-ip-3-trust-untrust] source-zone trust

[DeviceB-security-policy-ip-3-trust-untrust] destination-zone untrust

[DeviceB-security-policy-ip-3-trust-untrust] source-ip-subnet 10.1.2.0 24

[DeviceB-security-policy-ip-3-trust-untrust] destination-ip-subnet 10.1.1.0 24

[DeviceB-security-policy-ip-3-trust-untrust] action pass

[DeviceB-security-policy-ip-3-trust-untrust] quit

# 配置名称为untrust-trust的安全策略规则，使Host A访问Host B的报文可通，具体配置步骤如下。

[DeviceB-security-policy-ip] rule name untrust-trust

[DeviceB-security-policy-ip-4-untrust-trust] source-zone untrust

[DeviceB-security-policy-ip-4-untrust-trust] destination-zone trust

[DeviceB-security-policy-ip-4-untrust-trust] source-ip-subnet 10.1.1.0 24

[DeviceB-security-policy-ip-4-untrust-trust] destination-ip-subnet 10.1.2.0 24

[DeviceB-security-policy-ip-4-untrust-trust] action pass

[DeviceB-security-policy-ip-4-untrust-trust] quit

[DeviceB-security-policy-ip] quit

(6)     配置IPsec安全框架，建立IPsec隧道，保护需要防护的数据流

[DeviceB] ike keychain abc

[DeviceB-ike-keychain-abc] pre-shared-key address 2.2.2.1 255.255.255.0 key simple 123456TESTplat&!

[DeviceB-ike-keychain-abc] quit

[DeviceB] ike profile abc

[DeviceB-ike-profile-abc] keychain abc

[DeviceB-ike-profile-abc] local-identity address 2.2.3.1

[DeviceB-ike-profile-abc] match remote identity address 2.2.2.1 24

[DeviceB-ike-profile-abc] exchange-mode aggressive

[DeviceB-ike-profile-abc] quit

[DeviceB] ipsec transform-set abc

[DeviceB-ipsec-transform-set-abc] esp encryption-algorithm aes-cbc-128

[DeviceB-ipsec-transform-set-abc] esp authentication-algorithm sha1

[DeviceB-ipsec-transform-set-abc] quit

[DeviceB] ipsec profile abc isakmp

[DeviceB-ipsec-profile-isakmp-abc] transform-set abc

[DeviceB-ipsec-profile-isakmp-abc] ike-profile abc

[DeviceB-ipsec-profile-isakmp-abc] quit

(7)     配置IPsec隧道接口，用于对需要保护的流量进行IPsec封装

[DeviceB] interface tunnel 1

[DeviceB-Tunnel1] tunnel protection ipsec profile abc

[DeviceB-Tunnel1] quit

5. 验证配置结果

以上配置完成后，Device A会自动与Device B进行IKE协商。当IKE协商完成后，Device A和Device B上的IPsec 虚拟隧道接口都将up，即可以满足上述组网需求，对总部和分支的数据流进行安全保护。

# 通过display ip interface brief命令可查看接口状态如下：

<DeviceA> display ip interface brief

*down: administratively down

(s): spoofing  (l): loopback

Interface           Physical Protocol IP address/Mask    VPN instance Description

GE1/0/1             up       up       10.1.1.1/24        --           --

GE1/0/2             up       up       2.2.2.1/24         --           --

Tun1                up       up       3.3.3.1/24         --           --

# 通过display interface tunnel命令可查看隧道状态如下：

<DeviceA> display interface Tunnel 1

Tunnel1

Current state: UP

Line protocol state: UP

Description: Tunnel1 Interface

Bandwidth: 64 kbps

Maximum transmission unit: 1444

Internet address: 3.3.3.1/24 (primary)

Tunnel source 2.2.2.1, destination 2.2.3.1

Tunnel TTL 255

Tunnel protocol/transport IPsec/IP

Output queue - Urgent queuing: Size/Length/Discards 0/100/0

Output queue - Protocol queuing: Size/Length/Discards 0/500/0

Output queue - FIFO queuing: Size/Length/Discards 0/75/0

Last clearing of counters: Never

Last 300 seconds input rate: 0 bytes/sec, 0 bits/sec, 0 packets/sec

Last 300 seconds output rate: 0 bytes/sec, 0 bits/sec, 0 packets/sec

Input: 0 packets, 0 bytes, 0 drops

Output: 0 packets, 0 bytes, 0 drops

# 通过display ipsec sa命令查看协商生成的IPsec SA：

<DeviceA> display ipsec sa

-------------------------------

Interface: Tunnel1

-------------------------------

  -----------------------------

  IPsec profile: abc

  Mode: ISAKMP

  -----------------------------

    Tunnel id: 0

    Encapsulation mode: tunnel

    Perfect Forward Secrecy:

    Transmitting entity: Initiator

    Path MTU: 1388

    Tunnel:

        local  address: 2.2.2.1

        remote address: 2.2.3.1

    Flow:

        sour addr: 0.0.0.0/0.0.0.0  port: 0  protocol: ip

        dest addr: 0.0.0.0/0.0.0.0  port: 0  protocol: ip

    [Inbound ESP SAs]

      SPI: 2701952073 (0xa10c8449)

      Connection ID: 4294967296

      Transform set: ESP-ENCRYPT-AES-CBC-128 ESP-AUTH-SHA1

      SA duration (kilobytes/sec): 1843200/3600

      SA remaining duration (kilobytes/sec): 1843200/3180

      Max received sequence-number: 0

      Anti-replay check enable: Y

      Anti-replay window size: 64

      UDP encapsulation used for NAT traversal: N

      Status: Active

    [Outbound ESP SAs]

      SPI: 3607077598 (0xd6ffa2de)

      Connection ID: 12884901889

      Transform set: ESP-ENCRYPT-AES-CBC-128 ESP-AUTH-SHA1

      SA duration (kilobytes/sec): 1843200/3600

      SA remaining duration (kilobytes/sec): 1843200/3180

      Max sent sequence-number: 0

      UDP encapsulation used for NAT traversal: N

      Status: Active

# 在Device A上用私网地址可以Ping通Device B连接的私网地址：

<DeviceA> ping -a 10.1.1.1 10.1.2.1

Ping 10.1.2.1 (10.1.2.1) from 10.1.1.1: 56 data bytes, press CTRL_C to break

56 bytes from 10.1.2.1: icmp_seq=0 ttl=255 time=1.000 ms

56 bytes from 10.1.2.1: icmp_seq=1 ttl=255 time=1.000 ms

56 bytes from 10.1.2.1: icmp_seq=2 ttl=255 time=0.000 ms

56 bytes from 10.1.2.1: icmp_seq=3 ttl=255 time=1.000 ms

56 bytes from 10.1.2.1: icmp_seq=4 ttl=255 time=0.000 ms

--- Ping statistics for 10.1.2.1 ---

5 packet(s) transmitted, 5 packet(s) received, 0.0% packet loss

round-trip min/avg/max/std-dev = 0.000/0.600/1.000/0.490 ms