首页 > 其他分享> > 总部与分支机构之间建立点到点IPSec ***（预共享密钥认证）

总部与分支机构之间建立点到点IPSec ***（预共享密钥认证）

2020-12-05 23:51:08 作者：互联网

组网需求

如图1所示，网络A和网络B通过NGFW_A和NGFW_B连接到Internet，NGFW_A和NGFW_B公网路由可达。现需要在NGFW_A和NGFW_B之间建立IKE方式的IPSec隧道，使网络A和网络B的用户可通过IPSec隧道安全互访。

图1 IKE协商方式的点到点IPSec隧道举例组网图

数据规划

配置思路

NGFW_A和NGFW_B的配置思路相同。

1. 配置接口IP地址并将接口加入到安全区域。

2. 配置安全策略。

3. 配置到对端内网的路由。

4. 配置IPSec策略。包括配置IPSec策略的基本信息、配置待加密的数据流、配置安全提议的协商参数。

操作步骤

· 配置NGFW_A（总部）。

1. 配置接口IP地址。

<sysname> system-view
[sysname] sysname NGFW_A
[NGFW_A] interface GigabitEthernet 1/0/3
[NGFW_A-GigabitEthernet1/0/3] ip address 10.1.1.1 24
[NGFW_A-GigabitEthernet1/0/3] quit
[NGFW_A] interface GigabitEthernet 1/0/1
[NGFW_A-GigabitEthernet1/0/1] ip address 1.1.3.1 24
[NGFW_A-GigabitEthernet1/0/1] quit

2. 配置接口加入相应安全区域。

[NGFW_A] firewall zone trust
[NGFW_A-zone-trust] add interface GigabitEthernet 1/0/3
[NGFW_A-zone-trust] quit
[NGFW_A] firewall zone untrust
[NGFW_A-zone-untrust] add interface GigabitEthernet 1/0/1
[NGFW_A-zone-untrust] quit

3. 配置安全策略。

a. 配置Trust域与Untrust域的安全策略，允许封装前和解封后的报文能通过NGFW_A。

[NGFW_A] security-policy
[NGFW_A-policy-security] rule name policy_ipsec_1
[NGFW_A-policy-security-rule-policy_ipsec_1] source-zone trust
[NGFW_A-policy-security-rule-policy_ipsec_1] destination-zone untrust
[NGFW_A-policy-security-rule-policy_ipsec_1] source-address 10.1.1.0 24
[NGFW_A-policy-security-rule-policy_ipsec_1] destination-address 10.1.2.0 24
[NGFW_A-policy-security-rule-policy_ipsec_1] action permit
[NGFW_A-policy-security-rule-policy_ipsec_1] quit
[NGFW_A-policy-security] rule name policy_ipsec_2
[NGFW_A-policy-security-rule-policy_ipsec_2] source-zone untrust
[NGFW_A-policy-security-rule-policy_ipsec_2] destination-zone trust
[NGFW_A-policy-security-rule-policy_ipsec_2] source-address 10.1.2.0 24
[NGFW_A-policy-security-rule-policy_ipsec_2] destination-address 10.1.1.0 24
[NGFW_A-policy-security-rule-policy_ipsec_2] action permit
[NGFW_A-policy-security-rule-policy_ipsec_2] quit

b. 配置Local域与Untrust域的安全策略，允许IKE协商报文能正常通过NGFW_A。

[NGFW_A-policy-security] rule name policy_ipsec_3
[NGFW_A-policy-security-rule-policy_ipsec_3] source-zone local
[NGFW_A-policy-security-rule-policy_ipsec_3] destination-zone untrust
[NGFW_A-policy-security-rule-policy_ipsec_3] source-address 1.1.3.1 32
[NGFW_A-policy-security-rule-policy_ipsec_3] destination-address 1.1.5.1 32
[NGFW_A-policy-security-rule-policy_ipsec_3] action permit
[NGFW_A-policy-security-rule-policy_ipsec_3] quit
[NGFW_A-policy-security] rule name policy_ipsec_4
[NGFW_A-policy-security-rule-policy_ipsec_4] source-zone untrust
[NGFW_A-policy-security-rule-policy_ipsec_4] destination-zone local
[NGFW_A-policy-security-rule-policy_ipsec_4] source-address 1.1.5.1 32
[NGFW_A-policy-security-rule-policy_ipsec_4] destination-address 1.1.3.1 32
[NGFW_A-policy-security-rule-policy_ipsec_4] action permit
[NGFW_A-policy-security-rule-policy_ipsec_4] quit
[NGFW_A-policy-security] quit

4. 配置到达对端私网的路由。假设NGFW_A通往NGFW_B侧的下一跳设备的IP地址为1.1.3.2。

[NGFW_A] ip route-static 10.1.2.0 24 1.1.3.2

5. 配置NGFW_A的IPSec隧道。

a. 配置访问控制列表，定义需要保护的数据流。

[NGFW_A] acl 3000
[NGFW_A-acl-adv-3000] rule permit ip source 10.1.1.0 0.0.0.255 destination 10.1.2.0 0.0.0.255
[NGFW_A-acl-adv-3000] quit

b. 配置序号为10的IKE安全提议。

[NGFW_A] ike proposal 10
[NGFW_A-ike-proposal-10] authentication-method pre-share
[NGFW_A-ike-proposal-10] authentication-algorithm sha2-256
[NGFW_A-ike-proposal-10] quit

c. 配置IKE Peer。

[NGFW_A] ike peer b
[NGFW_A-ike-peer-b] ike-proposal 10
[NGFW_A-ike-peer-b] remote-address 1.1.5.1
[NGFW_A-ike-peer-b] pre-shared-key Admin@123
[NGFW_A-ike-peer-b] undo version 2
[NGFW_A-ike-peer-b] quit

d. 配置名称为tran1的IPSec安全提议。

[NGFW_A] ipsec proposal tran1
[NGFW_A-ipsec-proposal-tran1] encapsulation-mode tunnel
[NGFW_A-ipsec-proposal-tran1] transform esp
[NGFW_A-ipsec-proposal-tran1] esp authentication-algorithm sha2-256
[NGFW_A-ipsec-proposal-tran1] esp encryption-algorithm aes
[NGFW_A-ipsec-proposal-tran1] quit

e. 配置IPSec安全策略组map1。

[NGFW_A] ipsec policy map1 10 isakmp
[NGFW_A-ipsec-policy-isakmp-map1-10] security acl 3000
[NGFW_A-ipsec-policy-isakmp-map1-10] proposal tran1
[NGFW_A-ipsec-policy-isakmp-map1-10] ike-peer b
[NGFW_A-ipsec-policy-isakmp-map1-10] quit

f. 在出接口GigabitEthernet 1/0/1上应用安全策略组map1。

[NGFW_A] interface GigabitEthernet 1/0/1
[NGFW_A-GigabitEthernet1/0/1] ipsec policy map1 auto-neg
[NGFW_A-GigabitEthernet1/0/1] quit

· 配置NGFW_B（分支）。

1. 配置接口IP地址。

<sysname> system-view
[sysname] sysname NGFW_B
[NGFW_B] interface GigabitEthernet 1/0/3
[NGFW_B-GigabitEthernet1/0/3] ip address 10.1.2.1 24
[NGFW_B-GigabitEthernet1/0/3] quit
[NGFW_B] interface GigabitEthernet 1/0/1
[NGFW_B-GigabitEthernet1/0/1] ip address 1.1.5.1 24
[NGFW_B-GigabitEthernet1/0/1] quit

2. 配置接口加入相应安全区域。

[NGFW_B] firewall zone trust
[NGFW_B-zone-trust] add interface GigabitEthernet 1/0/3
[NGFW_B-zone-trust] quit
[NGFW_B] firewall zone untrust
[NGFW_B-zone-untrust] add interface GigabitEthernet 1/0/1
[NGFW_B-zone-untrust] quit

3. 配置安全策略。

a. 配置Trust域与Untrust域的安全策略，允许封装前和解封后的报文能通过NGFW_B。

[NGFW_B] security-policy
[NGFW_B-policy-security] rule name policy_ipsec_1
[NGFW_B-policy-security-rule-policy_ipsec_1] source-zone trust
[NGFW_B-policy-security-rule-policy_ipsec_1] destination-zone untrust
[NGFW_B-policy-security-rule-policy_ipsec_1] source-address 10.1.2.0 24
[NGFW_B-policy-security-rule-policy_ipsec_1] destination-address 10.1.1.0 24
[NGFW_B-policy-security-rule-policy_ipsec_1] action permit
[NGFW_B-policy-security-rule-policy_ipsec_1] quit
[NGFW_B-policy-security] rule name policy_ipsec_2
[NGFW_B-policy-security-rule-policy_ipsec_2] source-zone untrust
[NGFW_B-policy-security-rule-policy_ipsec_2] destination-zone trust
[NGFW_B-policy-security-rule-policy_ipsec_2] source-address 10.1.1.0 24
[NGFW_B-policy-security-rule-policy_ipsec_2] destination-address 10.1.2.0 24
[NGFW_B-policy-security-rule-policy_ipsec_2] action permit
[NGFW_B-policy-security-rule-policy_ipsec_2] quit

b. 配置Local域与Untrust域的安全策略，允许IKE协商报文能正常通过NGFW_B。

[NGFW_B-policy-security] rule name policy_ipsec_3
[NGFW_B-policy-security-rule-policy_ipsec_3] source-zone local
[NGFW_B-policy-security-rule-policy_ipsec_3] destination-zone untrust
[NGFW_B-policy-security-rule-policy_ipsec_3] source-address 1.1.5.1 32
[NGFW_B-policy-security-rule-policy_ipsec_3] destination-address 1.1.3.1 32
[NGFW_B-policy-security-rule-policy_ipsec_3] action permit
[NGFW_B-policy-security-rule-policy_ipsec_3] quit
[NGFW_B-policy-security] rule name policy_ipsec_4
[NGFW_B-policy-security-rule-policy_ipsec_4] source-zone untrust
[NGFW_B-policy-security-rule-policy_ipsec_4] destination-zone local
[NGFW_B-policy-security-rule-policy_ipsec_4] source-address 1.1.3.1 32
[NGFW_B-policy-security-rule-policy_ipsec_4] destination-address 1.1.5.1 32
[NGFW_B-policy-security-rule-policy_ipsec_4] action permit
[NGFW_B-policy-security-rule-policy_ipsec_4] quit
[NGFW_B-policy-security] quit

4. 配置到达对端私网的路由。假设NGFW_B通往NGFW_A侧的下一跳设备的IP地址为1.1.5.2。

[NGFW_B] ip route-static 10.1.1.0 24 1.1.5.2

5. 配置NGFW_B的IPSec隧道。

a. 配置访问控制列表，定义需要保护的数据流。

[NGFW_B] acl 3000
[NGFW_B-acl-adv-3000] rule permit ip source 10.1.2.0 0.0.0.255 destination 10.1.1.0 0.0.0.255
[NGFW_B-acl-adv-3000] quit

b. 配置序号为10的IKE安全提议。

[NGFW_B] ike proposal 10
[NGFW_B-ike-proposal-10] authentication-method pre-share
[NGFW_B-ike-proposal-10] authentication-algorithm sha2-256
[NGFW_B-ike-proposal-10] quit

c. 配置IKE Peer。

[NGFW_B] ike peer a
[NGFW_B-ike-peer-a] ike-proposal 10
[NGFW_B-ike-peer-a] remote-address 1.1.3.1
[NGFW_B-ike-peer-a] pre-shared-key Admin@123
[NGFW_B-ike-peer-a] undo version 2
[NGFW_B-ike-peer-a] quit

d. 配置名称为tran1的IPSec安全提议。

[NGFW_B] ipsec proposal tran1
[NGFW_B-ipsec-proposal-tran1] encapsulation-mode tunnel
[NGFW_B-ipsec-proposal-tran1] transform esp
[NGFW_B-ipsec-proposal-tran1] esp authentication-algorithm sha2-256
[NGFW_B-ipsec-proposal-tran1] esp encryption-algorithm aes
[NGFW_B-ipsec-proposal-tran1] quit

e. 配置IPSec安全策略组map1。

[NGFW_B] ipsec policy map1 10 isakmp
[NGFW_B-ipsec-policy-isakmp-map1-10] security acl 3000
[NGFW_B-ipsec-policy-isakmp-map1-10] proposal tran1
[NGFW_B-ipsec-policy-isakmp-map1-10] ike-peer a
[NGFW_B-ipsec-policy-isakmp-map1-10] quit

f. 在出接口GigabitEthernet 1/0/1上应用安全策略组map1。

[NGFW_B] interface GigabitEthernet 1/0/1
[NGFW_B-GigabitEthernet1/0/1] ipsec policy map1 auto-neg
[NGFW_B-GigabitEthernet1/0/1] quit

结果验证

1. 配置成功后，在NGFW_A上执行display ike sa命令，查看IKE安全联盟的建立情况，出现以下显示说明IKE安全联盟建立成功。

[NGFW_A] display ike sa
current ike sa number: 2
---------------------------------------------------------------------------
conn-id    peer                                flag          phase ***
---------------------------------------------------------------------------
3          1.1.5.1                             RD|ST|A       v1:2  public
2          1.1.5.1                             RD|ST|A       v1:1  public
  flag meaning
  RD--READY     ST--STAYALIVE     RL--REPLACED    FD--FADING    TO--TIMEOUT
  TD--DELETING  NEG--NEGOTIATING  D--DPD          M--ACTIVE     S--STANDBY
  A--ALONE

2. 在NGFW_A上执行display ipsec sa命令，查看IPSec安全联盟的建立情况，出现以下显示说明IPSec安全联盟建立成功。

[NGFW_A] display ipsec sa
===============================
Interface: GigabitEthernet 1/0/1
    path MTU: 1500
===============================
                           
  -----------------------------
  IPsec policy name: "map1"
  sequence number: 10
  mode: isakmp
  ***: 0
  -----------------------------
    connection id: 3
  rule number: 5
    encapsulation mode: tunnel
    holding time: 0d 0h 0m 12s
    tunnel local : 1.1.3.1    tunnel remote: 1.1.5.1
    flow      source: 10.1.1.0/255.255.255.0 0/0
    flow destination: 10.1.2.0/255.255.255.0 0/0
                           
    [inbound ESP SAs]
      spi: 3715780278 (0xdd7a4eb6)
    ***: public  said: 0  cpuid: 0x0000
      proposal: ESP-ENCRYPT-AES ESP-AUTH-SHA2-256
      sa remaining key duration (kilobytes/sec): 1843200/3588
      max received sequence-number: 1
      udp encapsulation used for nat traversal: N
                           
  [outbound ESP SAs]
     spi: 3312146193 (0xc56b5711)
      ***: public  said: 1  cpuid: 0x0000
      proposal: ESP-ENCRYPT-AES ESP-AUTH-SHA2-256
      sa remaining key duration (kilobytes/sec): 1843200/3588
      max sent sequence-number: 1
     udp encapsulation used for nat traversal: N

配置脚本

· NGFW_A（总部）的配置脚本

#
acl number 3000
 rule 5 permit ip source 10.1.1.0 0.0.0.255 destination 10.1.2.0 0.0.0.255
#
ike proposal 10
 authentication-algorithm sha2-256
 integrity-algorithm hmac-sha2-256
#
ike peer b
 pre-shared-key %$%$g6]1Md'q_QwX%A,v7]c1;md[%$%$
 ike-proposal 10
 undo version 2
 remote-address 1.1.5.1
#
ipsec proposal tran1
 esp authentication-algorithm sha2-256
#
ipsec policy map1 10 isakmp
 security acl 3000
 ike-peer b
 alias map1_10
 proposal tran1
#
interface GigabitEthernet1/0/3
 ip address 10.1.1.1 255.255.255.0
#
interface GigabitEthernet1/0/1
 ip address 1.1.3.1 255.255.255.0
 ipsec policy map1 auto-neg
#
firewall zone trust
 set priority 85
 add interface GigabitEthernet1/0/3
#
firewall zone untrust
set priority 5
 add interface GigabitEthernet1/0/1
#
 ip route-static 10.1.2.0 255.255.255.0 1.1.3.2
#
security-policy
  rule name policy_ipsec_1
    source-zone trust
    destination-zone untrust
    source-address 10.1.1.0 24
    destination-address 10.1.2.0 24
    action permit
  rule name policy_ipsec_2
    source-zone untrust
    destination-zone trust
    source-address 10.1.2.0 24
    destination-address 10.1.1.0 24
    action permit
  rule name policy_ipsec_3
    source-zone local
    destination-zone untrust
    source-address 1.1.3.1 32
    destination-address 1.1.5.1 32
    action permit
  rule name policy_ipsec_4
    source-zone untrust
    destination-zone local
    source-address 1.1.5.1 32
    destination-address 1.1.3.1 32
    action permit

· NGFW_B（分支）的配置脚本

#
acl number 3000
 rule 5 permit ip source 10.1.2.0 0.0.0.255 destination 10.1.1.0 0.0.0.255
#
ike proposal 10
 authentication-algorithm sha2-256
 integrity-algorithm hmac-sha2-256
#
ike peer a
 pre-shared-key %$%$g6]1Md'q_QwX%A,v7]c1;md[%$%$
 ike-proposal 10
 undo version 2
 remote-address 1.1.3.1
#
ipsec proposal tran1
 esp authentication-algorithm sha2-256
#
ipsec policy map1 10 isakmp
 security acl 3000
 ike-peer a
 proposal tran1
#
interface GigabitEthernet1/0/3
 ip address 10.1.2.1 255.255.255.0
#
interface GigabitEthernet1/0/1
 ip address 1.1.5.1 255.255.255.0
 ipsec policy map1 auto-neg
#
firewall zone trust
 set priority 85
 add interface GigabitEthernet1/0/3
#
firewall zone untrust
 set priority 5
 add interface GigabitEthernet1/0/1
#
 ip route-static 10.1.1.0 255.255.255.0 1.1.5.2
#
security-policy
  rule name policy_ipsec_1
    source-zone trust
    destination-zone untrust
    source-address 10.1.2.0 24
    destination-address 10.1.1.0 24
    action permit
  rule name policy_ipsec_2
    source-zone untrust
    destination-zone trust
    source-address 10.1.1.0 24
    destination-address 10.1.2.0 24
    action permit
  rule name policy_ipsec_3
    source-zone local
    destination-zone untrust
    source-address 1.1.5.1 32
    destination-address 1.1.3.1 32
    action permit
  rule name policy_ipsec_4
    source-zone untrust
    destination-zone local
    source-address 1.1.3.1 32
    destination-address 1.1.5.1 32
    action permit

标签：zone,点到点,rule,NGFW,密钥,policy,security,IPSec,ipsec
来源： https://blog.51cto.com/15047489/2560399