用户需求背景
榆林总部和西安分支现申请了两个公网IP，现在需要搭建IPsecPN实现私网互通，即192.168.1.0 访问192.168.2.0；
总部和分支192.168.1.0-192.168.2.0需要访问公网，用于测试12.12.12.12；
网络拓补图
配置思路
在总部和分支分别配置IP地址，打通内网，并设置去公网的默认路由；
内网用户上网需求实现，使用NAT转换；
两端分别创建IPsec，调用，最后实现访问分支；
实验代码过程
公网代码过于简单，不予展示，只需按图示配置IP地址即可
YL总部
sy [Huawei]undoinfo-centerenable [Huawei]sysnameYL [YL]dhcpenable Info:Theoperationmaytakeafewseconds.Pleasewaitforamoment.done. [YL]interfaceGigabitEthernet0/0/1 [YL-GigabitEthernet0/0/1]ipaddress192.168.1.124 [YL-GigabitEthernet0/0/1]dhcpselectinterface [YL-GigabitEthernet0/0/1]quit [YL]interfaceGigabitEthernet0/0/0 [YL-GigabitEthernet0/0/0]ipad [YL-GigabitEthernet0/0/0]ipaddress1.1.1.124 [YL-GigabitEthernet0/0/0]quit [YL] [YL] [YL] [YL-acl-adv-3000]ruledenyipdestination192.168.2.00.0.0.255 [YL-acl-adv-3000]rulepermitipsource192.168.1.00.0.0.255 [YL-acl-adv-3000]quit [YL] [YL] [YL]int [YL]interfaceg [YL]interfaceGigabitEthernet0/0/0 [YL-GigabitEthernet0/0/0]natoutbound3000 [YL-GigabitEthernet0/0/0]quit [YL] [YL]iproute-static0.0.0.001.1.1.2 [YL]acl3001 [YL-acl-adv-3001]rulepermitipsource192.168.1.00.0.0.255destination192.168.2.00.0.0.255 [YL]ipsecproposalyl [YL-ipsec-proposal-yl]espauthentication-algorithmsha2-256 [YL-ipsec-proposal-yl]espencryption-algorithmaes-128 [YL-ipsec-proposal-yl]quit [YL]ipsecpolicyyl10manual [YL-ipsec-policy-manual-yl-10]securityacl3001 [YL-ipsec-policy-manual-yl-10]proposalyl [YL-ipsec-policy-manual-yl-10]tunnellocal1.1.1.1 [YL-ipsec-policy-manual-yl-10]tunnelremote2.2.2.1 [YL-ipsec-policy-manual-yl-10]saspiinboundesp12345 [YL-ipsec-policy-manual-yl-10]saspioutboundesp54321 [YL-ipsec-policy-manual-yl-10]sastring-keyinboundespcipherhuawei.com [YL-ipsec-policy-manual-yl-10]sastring-keyoutboundespcipherhuawei.com [YL-ipsec-policy-manual-yl-10]quit [YL]interfaceGigabitEthernet0/0/0 [YL-GigabitEthernet0/0/0]ipsecpolicyyl [YL-GigabitEthernet0/0/0]quit
XIAN分支
sy Entersystemview,returnuserviewwithCtrl+Z. [Huawei]sysnameXIAN [XIAN]dhcenable//开启DHCP Info:Theoperationmaytakeafewseconds.Pleasewaitforamoment.done. [XIAN]un [XIAN]undoinen Info:Informationcenterisdisabled. [XIAN]interfaceGigabitEthernet0/0/0 [XIAN-GigabitEthernet0/0/0]ipad [XIAN-GigabitEthernet0/0/0]ipaddress2.2.2.124 [XIAN-GigabitEthernet0/0/0]quit [XIAN]interfaceGigabitEthernet0/0/1 [XIAN-GigabitEthernet0/0/1]ipaddress192.168.2.124 [XIAN-GigabitEthernet0/0/1]dhcpselectinterface [XIAN-GigabitEthernet0/0/1]quit [XIAN] [XIAN]acl3000//为私网用户开启NAT转换，使其可以访问公网，也就是图中loopback地址，12.12.12.12 [XIAN-acl-adv-3000]ruledenyipdestination192.168.1.00.0.0.255//访问私网192.168.1.0不进行NAT转换 [XIAN-acl-adv-3000]rulepermitipsource192.168.2.00.0.0.255//允许192.168.1.0私网访问互联网 [XIAN-acl-adv-3000]quit [XIAN]interfaceGigabitEthernet0/0/0 [XIAN-GigabitEthernet0/0/0]natoutbound3000//出口调用策略 [XIAN-GigabitEthernet0/0/0]quit [XIAN]iproute-static0.0.0.002.2.2.2//默认路由到公网 [XIAN] [XIAN] [XIAN] [XIAN]acl3001 [XIAN-acl-adv-3001]rulepermitipsource192.168.2.00.0.0.255destination192.168.1.00.0.0.255//定义需要保护的数据 [XIAN-acl-adv-3001]quit [XIAN]ipsecproposalxian//创建安全提议，名称“xian” [XIAN-ipsec-proposal-xian]espencryption-algorithmaes-128 [XIAN-ipsec-proposal-xian]espauthentication-algorithmsha2-256 [XIAN-ipsec-proposal-xian]quit [XIAN]ipsecpolicyxian10manual//创建IPsec策略，名称xian,编号10 [XIAN-ipsec-policy-manual-xian-10]securityacl3001//调用安全策略 [XIAN-ipsec-policy-manual-xian-10]proposalxian//调用安全提议 [XIAN-ipsec-policy-manual-xian-10]tunnelremote1.1.1.1//设置隧道终点IP [XIAN-ipsec-policy-manual-xian-10]tunnellocal2.2.2.1//设置隧道起点IP [XIAN-ipsec-policy-manual-xian-10]saspiinboundesp54321//SPI密钥，和总部密钥相反 [XIAN-ipsec-policy-manual-xian-10]saspioutboundesp12345//SPI密钥，和总部密钥相反 [XIAN-ipsec-policy-manual-xian-10]sastring-keyinboundespcipherhuawei.com [XIAN-ipsec-policy-manual-xian-10]sastring-keyoutboundespcipherhuawei.com [XIAN-ipsec-policy-manual-xian-10]quit [XIAN]interfaceGigabitEthernet0/0/0//出口下调用IPsec策略 [XIAN-GigabitEthernet0/0/0]ipsecpolicyxian [XIAN-GigabitEthernet0/0/0]quit [XIAN]
测试
抓包测试
审核编辑：刘清