防火墙

1.配置需求

配置需求及实现的效果

总部和分部各有一台防火墙部署在互联网出口，因业务需要两端内网业务需要通过GRE VPN相互访问。IP地址及接口规划如下表所示：



2网络拓扑图



3.配置步骤

3.1  总部侧防火墙基本网络配置

3.1.1  设置总部侧外网接口地址

#输入命令“system-view”进入系统视图后为1/0/3接口配置101.88.26.34/30的地址，并配置nat地址转换。

<H3C>system-view

[H3C]interface GigabitEthernet 1/0/3

[H3C-GigabitEthernet1/0/3]ip address 101.88.26.34 255.255.255.252

[H3C-GigabitEthernet1/0/3]nat outbound

[H3C-GigabitEthernet1/0/3]quit

3.1.2  设置总部侧内网接口地址

#在1/0/4接口配置连接内网地址192.168.10.1/24。

[H3C]interface GigabitEthernet 1/0/4

[H3C-GigabitEthernet1/0/4]ip address 192.168.10.1  255.255.255.0

[H3C-GigabitEthernet1/0/4]quit

3.1.3  设置总部侧到公网路由

#配置默认路由目的地址及掩码为0.0.0.0、下一跳（网关）地址为101.88.26.33。

[H3C]ip route-static 0.0.0.0 0 101.88.26.33

3.2  总部侧GRE VPN配置

3.2.1  新建Tunnel 0隧道接口

#新建Tunnel 0隧道接口，并配置IP地址为1.1.1.1/24，指定Tunnel 0接口源地址与目的地址分别对应总部分支侧的公网地址。

[H3C]interface Tunnel 0 mode gre

[H3C-Tunnel0]ip address 1.1.1.1 255.255.255.0

[H3C-Tunnel0]source 101.88.26.34

[H3C-Tunnel0]destination 198.76.26.90

[H3C-Tunnel0]quit

3.2.2  新建到tunnel接口的明细路由

#新建一条目的地址为192.168.20.0/24，下一跳（网关）地址为tunnel0接口的路由，用于匹配去往192.168.20.0/24网段的路由客户通过隧道转发。

[H3C]ip route-static 192.168.20.0 24 Tunnel 0

3.3  总部侧安全策略配置

3.3.1  将外网、内网、tunnel接口加入对应安全

#外网接口加untrust区域、内网接口、tunnel接口加入trust区域。

[H3C]security-zone name Untrust

[H3C-security-zone-Untrust]import interface GigabitEthernet
1/0/3

[H3C-security-zone-Untrust]quit

[H3C]security-zone name Trust

[H3C-security-zone-Trust]import interface GigabitEthernet
1/0/4

[H3C-security-zone-Trust]import interface Tunnel 0

[H3C-security-zone-Trust]quit

3.3.2  放通安全策略使数据通信正常

1. 放通trust到untrust、local的安全策略，使内网用户访问网络的同时能管理防火墙设备。

[H3C]security-policy ip

[H3C-security-policy-ip]rule 5 name trust-untrust、local

[H3C-security-policy-ip-5-trust-untrust、local]action pass

[H3C-security-policy-ip-5-trust-untrust、local]source-zone trust
[H3C-security-policy-ip-5-trust-untrust、local]destination-zone untrust

[H3C-security-policy-ip-5-trust-untrust、local]destination-zone local

[H3C-security-policy-ip-5-trust-untrust、local]quit

[H3C-security-policy-ip]quit

2. 放通untrust到trust目的地址为192.168.20.0/24网段到192.168.10.0/24网段的数据

#新建IPV4地址对象组分部网段与总部网段分别对应192.168.20.0/24与192.168.10.0/24网段。

[H3C]object-group ip address 分部网段

[H3C-obj-grp-ip-分部网段]0 network subnet 192.168.20.0 255.255.255.0

[H3C-obj-grp-ip-分部网段]quit

[H3C]object-group ip address 总部网段

[H3C-obj-grp-ip-总部网段]0 network subnet 192.168.10.0 255.255.255.0

[H3C-obj-grp-ip-总部网段]quit

#新建IPV4地址对象组

[H3C]security-policy ip

[H3C-security-policy-ip]rule 10 name untrust-trust

[H3C-security-policy-ip-10-untrust-trust]action pass

[H3C-security-policy-ip-10-untrust-trust]source-zone untrust

[H3C-security-policy-ip-10-untrust-trust]destination-zone trust

[H3C-security-policy-ip-10-untrust-trust]source-ip分部网段

[H3C-security-policy-ip-10-untrust-trust]destination-ip总部网段

[H3C-security-policy-ip-10-untrust-trust]quit

[H3C-security-policy-ip]quit

#放通同安全域间的安全策略

[H3C]security-zone intra-zone default permit

3.4  分部侧防火墙GRE配置

分部防火墙与总部侧防火墙配置方法一致。

3.5  结果测试

#使用总部侧PC机PING测试分部侧PC机测试：

可以看到在总部侧访问分部数据可达，并且通过“display interface Tunnel 0”可以看到收发包数量。

<H3C>display interface Tunnel 0

​Tunnel0

Current
state: UP

Line
protocol state: UP

Description: Tunnel0 Interf​ace

Bandwidth: 64 kbps

Maximum
transmission unit: 1476

Internet
address: 1.1.1.1/24 (primary)

Tunnel
source 101.88.26.34, destination 198.76.26.90

Tunnel
keepalive disabled

Tunnel
TTL 255

Tunnel
protocol/transport GRE/IP

    GRE key disabled

    Checksumming of GRE packets
disabled

Last
clearing of counters: Never

Last 300
seconds input rate: 0 bytes/sec, 0 bits/sec, 0 packets/sec

Last 300
seconds output rate: 0 bytes/sec, 0 bits/sec, 0 packets/sec

Input:
5 packets, 420 bytes, 0 drops

Output:
5 packets, 420 bytes, 0 drops

3.6  保存配置

[H3C]save f