6、中小企业网络架构-防火墙基本配置

网络拓扑：

配置思路：

配置下联接口；配置上联接口；配置端口区域；配置域间策略；配置静态路由；配置NAT

操作步骤：

一、防火墙

1、配置下联接口

<usg>system-view
[usg]sysname FW1
[FW1]interface  GigabitEthernet  0/0/1
[FW1-GigabitEthernet0/0/1]ip address 192.168.7.254 255.255.255.0
[FW1-GigabitEthernet0/0/1]description connecct to SW1
[FW1-GigabitEthernet0/0/1]quit

[FW1]interface  GigabitEthernet  0/0/2
[FW1-GigabitEthernet0/0/2]ip address 192.168.6.254 255.255.255.0
[FW1-GigabitEthernet0/0/2]description connecct to SW2
[FW1-GigabitEthernet0/0/2]quit

2、配置上联接口

[FW1]interface  GigabitEthernet  0/0/0
[FW1-GigabitEthernet0/0/0]ip address 100.1.1.1 255.255.255.248
[FW1-GigabitEthernet0/0/0]description connect to ISP1
[FW1-GigabitEthernet0/0/0]quit

3、配置端口区域

trust区域
[FW1]firewall zone  trust
[FW1-zone-trust]set priority 85
[FW1-zone-trust]add interface GigabitEthernet 0/0/1
[FW1-zone-trust]add interface GigabitEthernet 0/0/2
[FW1-zone-trust]quit

untrust区域
[FW1]firewall zone  untrust
[FW1-zone-untrust]set priority 5
[FW1-zone-untrust]add interface GigabitEthernet 0/0/0
[FW1-zone-untrust]quit

4、配置域间策略（生产环境根据实际情况选择）

[FW1]firewall packet-filter default permit all 

5、配置静态路由

[FW1]ip route-static 192.168.0.0 255.255.0.0 192.168.7.253
[FW1]ip route-static 192.168.0.0 255.255.0.0 192.168.6.253
[FW1]ip route-static 0.0.0.0 0.0.0.0 100.1.1.5

6、配置NAT

[FW1]nat-policy interzone trust  untrust  outbound
[FW1-nat-policy-interzone-trust-untrust-outbound]policy 1
[FW1-nat-policy-interzone-trust-untrust-outbound]action source-nat
[FW1-nat-policy-interzone-trust-untrust-outbound]policy source 192.168.0.0 mask 16
[FW1-nat-policy-interzone-trust-untrust-outbound]easy-ip GigabitEthernet0/0/0
[FW1-nat-policy-interzone-trust-untrust-outbound-1]quit
[FW1-nat-policy-interzone-trust-untrust-outbound]quit

二、客户端测试

1、PC端口设置自动获取IP

2、相互ping测试

3、内网访问ISP，查看防火墙NAT转发记录