在Device A和Device B之间建立一条IPsec隧道,对Host A所在的子网(10.1.1.0/24)与Host B所在的子网(10.1.2.0/24)之间的数据流进行安全保护。具体要求如下:
· 封装形式为隧道模式。
· 安全协议采用ESP协议。
· 加密算法采用128比特的AES,认证算法采用HMAC-SHA1。
· IKE协商方式建立IPsec SA。
图1-11 保护IPv4报文的IPsec配置组网图
(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) 配置静态路由
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
(3) 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] quit
(4) 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
(5) 定义需要保护的数据流
# 配置一个IPv4高级ACL,定义要保护由子网10.1.1.0/24去往子网10.1.2.0/24的数据流。
[DeviceA] acl advanced 3101
[DeviceA-acl-ipv4-adv-3101] rule permit ip source 10.1.1.0 0.0.0.255 destination 10.1.2.0 0.0.0.255
[DeviceA-acl-ipv4-adv-3101] quit
(6) 配置IPsec安全提议,协商封装报文使用的各种安全协议
# 创建IPsec安全提议,两端配置的安全提议参数需要完全相同,具体配置步骤如下。
[DeviceA] ipsec transform-set tran1
[DeviceA-ipsec-transform-set-tran1] encapsulation-mode tunnel
[DeviceA-ipsec-transform-set-tran1] protocol esp
[DeviceA-ipsec-transform-set-tran1] esp encryption-algorithm aes-cbc-128
[DeviceA-ipsec-transform-set-tran1] esp authentication-algorithm sha1
[DeviceA-ipsec-transform-set-tran1] quit
(7) 配置IKE keychain,约定通信双方使用的密钥信息
# 创建并配置IKE keychain,协商双方配置的预共享密钥必须完全相同,具体配置步骤如下。
[DeviceA] ike keychain keychain1
[DeviceA-ike-keychain-keychain1] pre-shared-key address 2.2.3.1 255.255.255.0 key simple 123456TESTplat&!
[DeviceA-ike-keychain-keychain1] quit
(8) 配置IKE profile,约定建立IKE SA所需的安全参数
[DeviceA] ike profile profile1
[DeviceA-ike-profile-profile1] keychain keychain1
[DeviceA-ike-profile-profile1] match remote identity address 2.2.3.1 255.255.255.0
[DeviceA-ike-profile-profile1] quit
(9) 配置IPsec安全策略,建立IPsec隧道,保护需要防护的数据流
# 创建一条IKE协商方式的IPsec安全策略,引用需要保护数据流的ACL和所需的IPsec安全提议,指定本端和对端的IP地址,引用IKE profile,具体配置步骤如下。
[DeviceA] ipsec policy map1 10 isakmp
[DeviceA-ipsec-policy-isakmp-map1-10] security acl 3101
[DeviceA-ipsec-policy-isakmp-map1-10] transform-set tran1
[DeviceA-ipsec-policy-isakmp-map1-10] local-address 2.2.2.1
[DeviceA-ipsec-policy-isakmp-map1-10] remote-address 2.2.3.1
[DeviceA-ipsec-policy-isakmp-map1-10] ike-profile profile1
[DeviceA-ipsec-policy-isakmp-map1-10] quit
(10) 在接口上应用IPsec安全策略,对接口上的流量进行保护
# 在接口GigabitEthernet1/0/2上应用安全策略,具体配置步骤如下。
[DeviceA] interface gigabitethernet 1/0/2
[DeviceA-GigabitEthernet1/0/2] ipsec apply policy map1
[DeviceA-GigabitEthernet1/0/2] quit
(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) 配置静态路由
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
(3) 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
[DeviceB-security-zone-Untrust] quit
(4) 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
(5) 定义数据流需要保护的数据流
# 配置一个IPv4高级ACL,定义要保护由子网10.1.2.0/24去往子网10.1.1.0/24的数据流。
[DeviceB] acl advanced 3101
[DeviceB-acl-ipv4-adv-3101] rule permit ip source 10.1.2.0 0.0.0.255 destination 10.1.1.0 0.0.0.255
[DeviceB-acl-ipv4-adv-3101] quit
(6) 配置IPsec安全提议,协商封装报文使用的各种安全协议
# 创建IPsec安全提议,两端配置的安全提议参数需要完全相同,具体配置步骤如下。
[DeviceB] ipsec transform-set tran1
[DeviceB-ipsec-transform-set-tran1] encapsulation-mode tunnel
[DeviceB-ipsec-transform-set-tran1] protocol esp
[DeviceB-ipsec-transform-set-tran1] esp encryption-algorithm aes-cbc-128
[DeviceB-ipsec-transform-set-tran1] esp authentication-algorithm sha1
[DeviceB-ipsec-transform-set-tran1] quit
(7) 配置IKE keychain,约定通信双方使用的密钥信息
# 创建并配置IKE keychain,协商双方配置的预共享密钥必须完全相同,具体配置步骤如下。
[DeviceB] ike keychain keychain1
[DeviceB-ike-keychain-keychain1] pre-shared-key address 2.2.2.1 255.255.255.0 key simple 123456TESTplat&!
[DeviceB-ike-keychain-keychain1] quit
(8) 配置IKE profile,约定建立IKE SA所需的安全参数
[DeviceB] ike profile profile1
[DeviceB-ike-profile-profile1] keychain keychain1
[DeviceB-ike-profile-profile1] match remote identity address 2.2.2.1 255.255.255.0
[DeviceB-ike-profile-profile1] quit
(9) 配置IPsec安全策略,建立IPsec隧道,保护需要防护的数据流
# 创建一条IKE协商方式的安全策略,引用需要保护数据流的ACL和所需的IPsec安全提议,指定本端和对端的IP地址,引用IKE profile,具体配置步骤如下。
[DeviceB] ipsec policy use1 10 isakmp
[DeviceB-ipsec-policy-isakmp-use1-10] security acl 3101
[DeviceB-ipsec-policy-isakmp-use1-10] transform-set tran1
[DeviceB-ipsec-policy-isakmp-use1-10] local-address 2.2.3.1
[DeviceB-ipsec-policy-isakmp-use1-10] remote-address 2.2.2.1
[DeviceB-ipsec-policy-isakmp-use1-10] ike-profile profile1
[DeviceB-ipsec-policy-isakmp-use1-10] quit
(10) 在接口上应用IPsec安全策略,对接口上的流量进行保护
# 在接口GigabitEthernet1/0/2上应用IPsec安全策略,具体配置步骤如下。
[DeviceB] interface gigabitethernet 1/0/2
[DeviceB-GigabitEthernet1/0/2] ipsec apply policy use1
[DeviceB-GigabitEthernet1/0/2] quit
# 以上配置完成后,Device A和Device B之间如果有子网10.1.1.0/24与子网10.1.2.0/24之间的报文通过,将触发IKE进行IPsec SA的协商。IKE成功协商出IPsec SA后,子网10.1.1.0/24与子网10.1.2.0/24之间数据流的传输将受到IPsec SA的保护。可通过以下显示查看到协商生成的IPsec SA。
[DeviceA] display ipsec sa
-------------------------------
Interface: GigabitEthernet1/0/2
-------------------------------
-----------------------------
IPsec policy: map1
Sequence number: 10
Mode: ISAKMP
-----------------------------
Tunnel id: 0
Encapsulation mode: tunnel
Perfect Forward Secrecy:
Inside VPN:
Extended Sequence Numbers enable: N
Traffic Flow Confidentiality enable: N
Transmitting entity: Initiator
Path MTU: 1443
Tunnel:
local address: 2.2.3.1
remote address: 2.2.2.1
Flow:
sour addr: 2.2.3.1/0.0.0.0 port: 0 protocol: ip
dest addr: 2.2.2.1/0.0.0.0 port: 0 protocol: ip
[Inbound ESP SAs]
SPI: 3769702703 (0xe0b1192f)
Connection ID: 90194313219
Transform set: ESP-ENCRYPT-AES-CBC-128 ESP-AUTH-SHA1
SA duration (kilobytes/sec): 3000/28800
SA remaining duration (kilobytes/sec): 2300/797
Max received sequence-number: 1
Anti-replay check enable: N
Anti-replay window size:
UDP encapsulation used for NAT traversal: N
Status: Active
[Outbound ESP SAs]
SPI: 3840956402 (0xe4f057f2)
Connection ID: 64424509441
Transform set: ESP-ENCRYPT-AES-CBC-128 ESP-AUTH-SHA1
SA duration (kilobytes/sec): 3000/28800
SA remaining duration (kilobytes/sec): 2312/797
Max sent sequence-number: 1
UDP encapsulation used for NAT traversal: N
Status: Active
# Device B上也会产生相应的IPsec SA来保护IPv4报文,查看方式与Device A同,此处略。
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