ipsec简介

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IPSec（InternetProtocolSecurity）是安全联网的长期方向。它通过端对端的安全性来提供主动的保护以防止专用网络与 Internet 的***。在通信中，只有发送方和接收方才是唯一必须了解 IPSec 保护的计算机。在 Windows 2000、Windows XP 和 Windows Server 2003 家族中，IPSec 提供了一种能力，以保护工作组、局域网计算机、域客户端和服务器、分支机构（物理上为远程机构）、Extranet 以及漫游客户端之间的通信。

下面我们就用一台三层交换机和三台防火墙来模拟一下ipsec

拓扑图

设置三层交换机

sys

[Quidway]sys isp

[isp]vlan 10

[isp-vlan10]port e0/1

[isp-vlan10]vlan 20

[isp-vlan20]port e0/9

[isp-vlan20]vlan 30

[isp-vlan30]port e0/17

[isp-vlan30]int vlan10

[isp-Vlan-interface10]ip add 67.130.130.1 255.255.255.252

[isp-Vlan-interface10]int vlan 20

[isp-Vlan-interface20]ip add 67.130.130.5 255.255.255.252

[isp-Vlan-interface20]int vlan 30

[isp-Vlan-interface30]ip add 67.130.130.9 255.255.255.252

设置fw1

sys

[H3C]sys fw1

[fw1]int eth0/0

[fw1-Ethernet0/0]ip add 192.168.3.1 24

[fw1-Ethernet0/0]loopback

[fw1-Ethernet0/0]int eth0/4

[fw1-Ethernet0/4]ip add 67.130.130.2 30

取消端口隔离

[fw1]undo insulate

添加eth0/4到untrust

[fw1]firewall zone untrust

[fw1-zone-untrust]add int eth0/4

添加eth0/0到trust

[fw1]firewall zone trust

[fw1-zone-trust]add int eth0/0

用访问控制列表筛选

[fw1]acl number 3000 match-order auto

[fw1-acl-adv-3000]rule 10 permit ip source 192.168.3.0 0.0.0.255 destination 192.168.4.0 0.0.0.255

[fw1-acl-adv-3000]rule 20 deny ip source any destination any

创建安全提议tran1

[fw1]ipsec proposal tran1

选择管道方式

[fw1-ipsec-proposal-tran1]encapsulation-mode tunnel

选择安全协议sep

[fw1-ipsec-proposal-tran1]transform esp

完整性校验选md5

[fw1-ipsec-proposal-tran1]esp authentication-algorithm md5

加密算法选des

[fw1-ipsec-proposal-tran1]esp encryption-algorithm des

设置ike peer

[fw1]ike peer fw2

设置来源ip

[fw1-ike-peer-fw2]local-address 67.130.130.2

设置目标ip

[fw1-ike-peer-fw2]remote-address 67.130.130.6

设置密钥

[fw1-ike-peer-fw2]pre-shared-key 123456

注意，这个密钥一定要记住，下面还要用到

isa和筛选流相结合

选择动态isa

[fw1]ipsec policy policy1 10 isakmp

筛选符合3000表的流

[fw1-ipsec-policy-isakmp-policy1-10]security acl 3000

选择符合提议tran1的

[fw1-ipsec-policy-isakmp-policy1-10]proposal tran1

选择ike 对等体为fw2

[fw1-ipsec-policy-isakmp-policy1-10]ike-peer fw2

进入端口eth0/4应用策略

[fw1]int eth0/4

[fw1-Ethernet0/4]ipsec policy policy1

第一条隧道已经设置好了，接着该去设置这条隧道的另一端，进入防火墙fw2

下面是第二条隧道的设置

[fw1]acl number 3001 match-order auto

[fw1-acl-adv-3001]rule permit ip source 192.168.3.0 0.0.0.255 destination 192.168.5.0 0.0.0.255

[fw1-acl-adv-3001]rule deny ip source any destination any

[fw1]ipsec proposal tran2

[fw1-ipsec-proposal-tran2]encapsulation-mode tunnel

[fw1-ipsec-proposal-tran2]transform esp

[fw1-ipsec-proposal-tran2]esp authentication-algorithm md5

[fw1-ipsec-proposal-tran2]esp encryption-algorithm des

[fw1]ike peer fw3

[fw1-ike-peer-fw3]local-address 67.130.130.2

[fw1-ike-peer-fw3]remote-address 67.130.130.10

[fw1-ike-peer-fw3]pre-shared-key 654321

[fw1]acl number 3001 match-order auto

[fw1-acl-adv-3000]undo rule 20

设置fw2

sys

[H3C]sys fw2

[fw2]int eth0/0

[fw2-Ethernet0/0]ip add 192.168.4.1 24

[fw2-Ethernet0/0]loopback

[fw2-Ethernet0/0]int eth0/4

[fw2-Ethernet0/4]ip add 67.130.130.6 30

[fw2]undo insulate

[fw2]firewall packet-filter default permit

[fw2]firewall zone trust

[fw2-zone-trust]add interface eth0/0

[fw2]firewall zone untrust

[fw2-zone-untrust]add int eth0/4

[fw2]ip route-static 0.0.0.0 0 67.130.130.5

[fw2]acl number 3000 match-order auto

[fw2-acl-adv-3000]rule 10 permit ip source 192.168.4.0 0.0.0.255 destination 192.168.3.0 0.0.0.255

[fw2-acl-adv-3000]rule 20 deny ip source any destination any

[fw2]ipsec proposal tran1

[fw2-ipsec-proposal-tran1]encapsulation-mode tunnel

[fw2-ipsec-proposal-tran1]esp authentication-algorithm md5

[fw2-ipsec-proposal-tran1]esp encryption-algorithm des

[fw2]ike peer fw1

[fw2-ike-peer-fw1]local-address 67.130.130.6

[fw2-ike-peer-fw1]remote-address 67.130.130.2

[fw2-ike-peer-fw1]pre-shared-key 123456

这个密钥要和另外一端的一样

[fw2]ipsec policy policy1 10 isakmp

[fw2-ipsec-policy-isakmp-policy1-10]security acl 3000

[fw2-ipsec-policy-isakmp-policy1-10]proposal tran1

[fw2-ipsec-policy-isakmp-policy1-10]ike-peer fw1

[fw2]int eth0/4

[fw2-Ethernet0/4]ipsec policy policy1

配置fw3

sys

[H3C]sys fw3

[fw3]int eth0/0

[fw3-Ethernet0/0]ip add 192.168.5.1 24

[fw3-Ethernet0/0]loopback

[fw3-Ethernet0/0]int eth0/4

[fw3-Ethernet0/4]ip add 67.130.130.10 30

[fw3]undo insulate

[fw3]firewall zone untrust

[fw3-zone-untrust]add int eth0/4

[fw3]firewall zone trust

[fw3-zone-trust]add int eth0/0

[fw3]ip route-static 0.0.0.0 0 67.130.130.9

[fw3]acl number 3001 match-order auto

[fw3-acl-adv-3001]rule 10 permit ip source 192.168.5.0 0.0.0.255 destination 192.168.3.0 0.0.0.255

[fw3-acl-adv-3001]rule 20 deny ip source any destination any

[fw3]ipsec proposal tran2

[fw3-ipsec-proposal-tran2]encapsulation-mode tunnel

[fw3-ipsec-proposal-tran2]transform esp

[fw3-ipsec-proposal-tran2]esp authentication-algorithm md5

[fw3-ipsec-proposal-tran2]esp encryption-algorithm des

[fw3]ike peer fw1

[fw3-ike-peer-fw1]local-address 67.130.130.10

[fw3-ike-peer-fw1]remote-address 67.130.130.2

[fw3-ike-peer-fw1]pre-shared-key 654321

[fw3]ipsec policy policy1 10 isakmp

[fw3-ipsec-policy-isakmp-policy1-10]security acl 3001

[fw3-ipsec-policy-isakmp-policy1-10]tracert tran2

[fw3-ipsec-policy-isakmp-policy1-10]ike-peer fw1

[fw3]int eth0/4

[fw3-Ethernet0/4]ipsec policy policy1

好了ipsec

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