内网：
配置GigabitEthernet 0/0/1加入Trust区域
[USG5300] firewall zone trust
[USG5300-zone-untrust] add interface GigabitEthernet 0/0/1
外网：
配置GigabitEthernet 0/0/2加入Untrust区域
[USG5300] firewall zone untrust
[USG5300-zone-untrust] add interface GigabitEthernet 0/0/2
DMZ：
[USG5300] firewall zone dmz
[USG5300-zone-untrust] add interface GigabitEthernet 0/0/3
[USG5300-zone-untrust] quit
Trust和Untrust域间：允许内网用户访问公网
policy 1：
[USG5300] policy interzone trust untrust outbound
[USG5300-policy-interzone-trust-untrust-outbound] policy 1
[USG5300-policy-interzone-trust-untrust-outbound-1] policy source
[USG5300-policy-interzone-trust-untrust-outbound-1] action permit
[USG5300-policy-interzone-trust-untrust-outbound-1] quit
如果是允许所有的内网地址上公网可以用以下命令：
[USG2100]firewall packet-filter default permit interzone trust untrust direction outbound //必须
DMZ和Untrust域间：从公网访问内部服务器
policy 2：，目的端口为21的报文通过
policy 3：，目的端口为8080的报文通过
[USG5300] policy interzone untrust dmz inbound
[USG5300-policy-interzone-dmz-untrust-inbound] policy 2
[USG5300-policy-interzone-dmz-untrust-inbound-2] policy destination 0
[USG5300-policy-interzone-dmz-untrust-inbound-2] policy service service-set ftp
[USG5300-policy-interzone-dmz-untrust-inbound-2] action permit
[USG5300-policy-interzone-dmz-untrust-i
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