玩转华为ENSP模拟器系列 | 两个网关之间通过手工方式创建IPSec VdPdNd隧道

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目标

手工方式建立IPSec隧道需要手工配置安全协议,入方向和出方向的安全参数索引(SPI),以及安全协议采用的入方向和出方向的验证密钥。当与FW进行通信的对等体设备数量较少时,或是在小型静态环境中,手工配置安全联盟是可行的,但不推荐。

组网需求

图1所示,网络A和网络B之间采用网关对网关组网模式进行资源传输。网络A和网络B分别通过FW_A和FW_B连接到Internet。网络环境描述如下:

  • 网络A属于10.1.1.0/24子网,通过接口GE1/0/3与FW_A连接。
  • 网络B属于10.1.2.0/24子网,通过接口GE1/0/3与FW_B连接。
  • FW_A和FW_B路由可达。

配置思路

  1. 根据网络规划为FW分配接口,配置接口的IP地址并将接口加入相应的安全区域。
  1. 通过配置高级ACL规则组来定义需要保护的数据流。
  1. 配置域间安全策略。
  1. 配置IPSec安全提议。
  1. 配置IPSec策略。
  1. 应用IPSec策略。

操作步骤

配置FW_A。

  1. 配置接口IP地址。

    1. 配置接口GE1/0/3的IP地址。
    2. <sysname> system-view
      [sysname] sysname FW_A
      [FW_A] interface gigabitethernet 1 / 0 / 3
      [FW_A-GigabitEthernet1/0/3] ip address 10.1.1.1  24
      [FW_A-GigabitEthernet1/0/3] quit
      复制代码
    3. 配置接口GE1/0/1的IP地址。
    4. [FW_A] interface gigabitethernet 1 / 0 / 1
      [FW_A-GigabitEthernet1/0/1] ip address 1.1.3.1  24
      [FW_A-GigabitEthernet1/0/1] quit
      复制代码
  1. 配置接口加入相应安全区域。

    1. 将接口GE1/0/3加入Trust区域。
    2. [FW_A] firewall zone trust
      [FW_A-zone-trust] add interface gigabitethernet 1 / 0 / 3
      [FW_A-zone-trust] quit
      复制代码
    3. 将接口GE1/0/1加入Untrust区域。
    4. [FW_A] firewall zone untrust
      [FW_A-zone-untrust] add interface gigabitethernet 1 / 0 / 1
      [FW_A-zone-untrust] quit
      复制代码
  1. 配置域间安全策略。

    1. 配置Trust域与Untrust域之间的域间安全策略。
    2. [FW_A] security-policy
      [FW_A-policy-security] rule name policy1
      [FW_A-policy-security-rule-policy1] source-zone trust
      [FW_A-policy-security-rule-policy1] destination-zone untrust
      [FW_A-policy-security-rule-policy1] source-address 10.1.1.0  24
      [FW_A-policy-security-rule-policy1] destination-address 10.1.2.0  24
      [FW_A-policy-security-rule-policy1] action permit
      [FW_A-policy-security-rule-policy1] quit
      [FW_A-policy-security] rule name policy2
      [FW_A-policy-security-rule-policy2] source-zone untrust
      [FW_A-policy-security-rule-policy2] destination-zone trust
      [FW_A-policy-security-rule-policy2] source-address 10.1.2.0  24
      [FW_A-policy-security-rule-policy2] destination-address 10.1.1.0  24
      [FW_A-policy-security-rule-policy2] action permit
      [FW_A-policy-security-rule-policy2] quit
      复制代码
    3. 配置Untrust域与Local域之间的域间安全策略。
    4. [FW_A-policy-security] rule name policy3
      [FW_A-policy-security-rule-policy3] source-zone local
      [FW_A-policy-security-rule-policy3] destination-zone untrust
      [FW_A-policy-security-rule-policy3] source-address 1.1.3.1  32
      [FW_A-policy-security-rule-policy3] destination-address 1.1.5.1  32
      [FW_A-policy-security-rule-policy3] action permit
      [FW_A-policy-security-rule-policy3] quit
      [FW_A-policy-security] rule name policy4
      [FW_A-policy-security-rule-policy4] source-zone untrust
      [FW_A-policy-security-rule-policy4] destination-zone local
      [FW_A-policy-security-rule-policy4] source-address 1.1.5.1  32
      [FW_A-policy-security-rule-policy4] destination-address 1.1.3.1  32
      [FW_A-policy-security-rule-policy4] action permit
      [FW_A-policy-security-rule-policy4] quit
      [FW_A-policy-security] quit
      复制代码
  1. 配置到达网络B的静态路由,此处假设到达网络B的下一跳地址为1.1.3.2。
[FW_A] ip route- static  10.1.2.0  255.255.255.0  1.1.3.2
[FW_A] ip route- static  1.1.5.0  255.255.255.0  1.1.3.2
复制代码
  1. 配置高级ACL 3000,允许10.1.1.0/24网段访问10.1.2.0/24网段。
[FW_A] acl 3000
[FW_A-acl-adv-3000] rule 5 permit ip source 10.1.1.0  0.0.0.255 destination 10.1.2.0  0.0.0.255
[FW_A-acl-adv-3000] quit
复制代码
  1. 配置IPSec安全提议tran1。
[FW_A] ipsec proposal tran1
[FW_A-ipsec-proposal-tran1] encapsulation-mode tunnel
[FW_A-ipsec-proposal-tran1] transform esp
[FW_A-ipsec-proposal-tran1] esp authentication-algorithm sha2- 256
[FW_A-ipsec-proposal-tran1] esp encryption-algorithm aes- 256
[FW_A-ipsec-proposal-tran1] quit
复制代码
  1. 配置名称为map1,序号为10的IPSec策略。
[FW_A] ipsec policy map1 10 manual
[FW_A-ipsec-policy-manual-map1-10] security acl 3000
[FW_A-ipsec-policy-manual-map1-10] proposal tran1
[FW_A-ipsec-policy-manual-map1-10] tunnel remote 1.1.5.1
[FW_A-ipsec-policy-manual-map1-10] tunnel local 1.1.3.1
[FW_A-ipsec-policy-manual-map1-10] sa spi inbound esp 12345678
[FW_A-ipsec-policy-manual-map1-10] sa spi outbound esp 87654321
[FW_A-ipsec-policy-manual-map1-10] sa string-key inbound esp abcdefg
[FW_A-ipsec-policy-manual-map1-10] sa string-key outbound esp gfedcba
[FW_A-ipsec-policy-manual-map1-10] quit
复制代码
  1. 在接口GE1/0/1上应用IPSec策略组map1。
[FW_A] interface gigabitethernet 1 / 0 / 1
[FW_A-GigabitEthernet1/0/1] ipsec policy map1
[FW_A-GigabitEthernet1/0/1] quit
复制代码

配置FW_B。

  1. 配置接口IP地址。

    1. 配置接口GE1/0/3的IP地址。
    2. <sysname> system-view
      [sysname] sysname FW_B
      [FW_B] interface gigabitethernet 1 / 0 / 3
      [FW_B-GigabitEthernet1/0/3] ip address 10.1.2.1  24
      [FW_B-GigabitEthernet1/0/3] quit
      复制代码
    3. 配置接口GE1/0/1的IP地址。
    4. [FW_B] interface gigabitethernet 1 / 0 / 1
      [FW_B-GigabitEthernet1/0/1] ip address 1.1.5.1  24
      [FW_B-GigabitEthernet1/0/1] quit
      复制代码
  1. 配置接口加入相应安全区域。

    1. 将接口GE1/0/3加入Trust区域。
    2. [FW_B] firewall zone trust
      [FW_B-zone-trust] add interface gigabitethernet 1 / 0 / 3
      [FW_B-zone-trust] quit
      复制代码
    3. 将接口GE1/0/1加入Untrust区域。
    4. [FW_B] firewall zone untrust
      [FW_B-zone-untrust] add interface gigabitethernet 1 / 0 / 1
      [FW_B-zone-untrust] quit
      复制代码
  1. 配置域间安全策略。

    1. 配置Trust域与Untrust域之间的域间安全策略。
    2. [FW_B] security-policy
      [FW_B-policy-security] rule name policy1
      [FW_B-policy-security-rule-policy1] source-zone trust
      [FW_B-policy-security-rule-policy1] destination-zone untrust
      [FW_B-policy-security-rule-policy1] source-address 10.1.2.0  24
      [FW_B-policy-security-rule-policy1] destination-address 10.1.1.0  24
      [FW_B-policy-security-rule-policy1] action permit
      [FW_B-policy-security-rule-policy1] quit
      [FW_B-policy-security] rule name policy2
      [FW_B-policy-security-rule-policy2] source-zone untrust
      [FW_B-policy-security-rule-policy2] destination-zone trust
      [FW_B-policy-security-rule-policy2] source-address 10.1.1.0  24
      [FW_B-policy-security-rule-policy2] destination-address 10.1.2.0  24
      [FW_B-policy-security-rule-policy2] action permit
      [FW_B-policy-security-rule-policy2] quit
      复制代码
    3. 配置Untrust域与Local域之间的域间安全策略。
    4. [FW_B-policy-security] rule name policy3
      [FW_B-policy-security-rule-policy3] source-zone local
      [FW_B-policy-security-rule-policy3] destination-zone untrust
      [FW_B-policy-security-rule-policy3] source-address 1.1.5.1  32
      [FW_B-policy-security-rule-policy3] destination-address 1.1.3.1  32
      [FW_B-policy-security-rule-policy3] action permit
      [FW_B-policy-security-rule-policy3] quit
      [FW_B-policy-security] rule name policy4
      [FW_B-policy-security-rule-policy4] source-zone untrust
      [FW_B-policy-security-rule-policy4] destination-zone local
      [FW_B-policy-security-rule-policy4] source-address 1.1.3.1  32
      [FW_B-policy-security-rule-policy4] destination-address 1.1.5.1  32
      [FW_B-policy-security-rule-policy4] action permit
      [FW_B-policy-security-rule-policy4] quit
      [FW_B-policy-security] quit
      复制代码
  1. 配置到达目的网络A的静态路由,此处假设到达网络A的下一跳地址为1.1.5.2。
[FW_B] ip route- static  10.1.1.0  255.255.255.0  1.1.5.2
[FW_B] ip route- static  1.1.3.0  255.255.255.0  1.1.5.2
复制代码
  1. 配置高级ACL 3000,允许10.1.2.0/24网段访问10.1.1.0/24网段。
[FW_B] acl 3000
[FW_B-acl-adv-3000] rule 5 permit ip source 10.1.2.0  0.0.0.255 destination 10.1.1.0  0.0.0.255
[FW_B-acl-adv-3000] quit
复制代码
  1. 配置名称为tran1的IPSec安全提议。
[FW_B] ipsec proposal tran1
[FW_B-ipsec-proposal-tran1] encapsulation-mode tunnel
[FW_B-ipsec-proposal-tran1] transform esp
[FW_B-ipsec-proposal-tran1] esp authentication-algorithm sha2- 256
[FW_B-ipsec-proposal-tran1] esp encryption-algorithm aes- 256
[FW_B-ipsec-proposal-tran1] quit
复制代码
  1. 配置名称为map1序号为10的IPSec策略。
[FW_B] ipsec policy map1 10 manual
[FW_B-ipsec-policy-manual-map1-10] security acl 3000
[FW_B-ipsec-policy-manual-map1-10] proposal tran1
[FW_B-ipsec-policy-manual-map1-10] tunnel remote 1.1.3.1
[FW_B-ipsec-policy-manual-map1-10] tunnel local 1.1.5.1
[FW_B-ipsec-policy-manual-map1-10] sa spi inbound esp 87654321
[FW_B-ipsec-policy-manual-map1-10] sa spi outbound esp 12345678
[FW_B-ipsec-policy-manual-map1-10] sa string-key inbound esp gfedcba
[FW_B-ipsec-policy-manual-map1-10] sa string-key outbound esp abcdefg
[FW_B-ipsec-policy-manual-map1-10] quit
复制代码
  1. 在接口GE1/0/1上应用IPSec策略组map1。
[FW_B] interface gigabitethernet 1 / 0 / 1
[FW_B-GigabitEthernet1/0/1] ipsec policy map1
[FW_B-GigabitEthernet1/0/1] quit
复制代码

结果验证

分别FW_A和FW_B上执行display ipsec sa会显示安全联盟的建立情况。以FW_B为例,出现以下显示信息说明IPSec安全联盟建立成功。

<FW_B> display ipsec sa
                                                                                
ipsec sa information:                                                           
                                                                                
===============================                                                 
Interface: GigabitEthernet1/0/1                                                 
===============================                                                 
                                                                                
  -----------------------------                                                 
  IPSec policy name: "map1"                                                     
  Sequence number  : 10                                                         
  Acl group        : 3000                                                       
  Acl rule         : -                                                          
  Mode             : Manual                                                     
  -----------------------------                                                 
    Encapsulation mode: Tunnel                                                  
    Tunnel local      : 1.1.5.1                                                 
    Tunnel remote     : 1.1.3.1                                                 
                                                                                
    [Outbound ESP SAs]                                                          
      SPI: 12345678 (0xbc614e)                                                  
      Proposal: ESP-ENCRYPT-AES-256 SHA2-256-128                                
      SA encrypted packets (number/bytes): 0/0                                  
      No duration limit for this SA                                             
                                                                                
    [Inbound ESP SAs]                                                           
      SPI: 87654321 (0x5397fb1)                                                 
      Proposal: ESP-ENCRYPT-AES-256 SHA2-256-128                                
      SA decrypted packets (number/bytes): 0/0                                  
      No duration limit for this SA                                             
      Anti-replay : Disable 
复制代码

网络A上执行ping操作可以ping通网络B,执行命令display ipsec statistics可以查看被加密的数据。例如:

<FW_B> display ipsec statistics
 IPSec statistics information:                                           
 the security packet statistics:                                                
   input/output security packets: 20 / 20                             
   input/output security bytes: 2000/2000                         
   input/output dropped security packets: 0/0                          
   the encrypt packet statistics:                                               
     send chip: 63, recv chip: 63, send err: 0                          
     local cpu: 63, other cpu: 0, recv other cpu: 0                         
     intact packet: 63, first slice: 0, after slice: 0                      
   the decrypt packet statistics:                                               
     send chip: 244, recv chip: 244, send err: 0                 
     local cpu: 244, other cpu: 0, recv other cpu: 0                     
     reass  first slice: 0, after slice: 0                     
   dropped security packet detail:                                              
     can't find SA: 0, wrong SA: 0                                     
     authentication: 0, replay: 0                                              
     front recheck: 0, after recheck: 0                                        
     change cpu enc: 0, dec change cpu: 0                                       
     fib search: 0, output l3: 0                                                
     flow err: 0, slice err: 0, byte limit: 0                                
  negotiate about packet statistics:                                            
    IKE fwd packet ok: 93, err: 0                                           
    IKE ctrl packet inbound ok: 92, outbound ok: 58                     
    SoftExpr: 0, HardExpr: 0, DPDOper: 0                                       
    trigger ok: 0, switch sa: 35684, sync sa: 0                                 
    recv IKE nat keepalive: 114731, IKE input: 0  


 

 

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