6、中小企業網絡架構-防火牆基本配置

網絡拓撲：

配置思路：

配置下聯接口；配置上聯接口；配置端口區域；配置域間策略；配置靜態路由；配置NAT

操作步驟：

一、防火牆

1、配置下聯接口

<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、配置上聯接口

[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、配置端口區域

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

4、配置域間策略（生產環境根據實際情況選擇）

[FW1]firewall packet-filter default permit all 

5、配置靜態路由

[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、客戶端測試

1、PC端口設置自動獲取IP

2、相互ping測試

3、內網訪問ISP，查看防火牆NAT轉發記錄