7 .3 Access Control List (ACL) 过滤规则（ACL）

Access Control List – (ACL)

过滤规则（ACL）

Function Explanation: It is used to control the movement of data packets in and out of ports and can filter traffic in the network. It is a network technology that controls access.After configuration, it can restrict network traffic, allow access to specific devices, specify the forwarding of certain port packets, etc.
功能解释：用来控制端口进出的数据包，可以过滤网络中的流量，是控制访问的一种网络技术手段。配置后，可以限制网络流量，允许特定设备访问，指定转发特定端口数据包等。

Configuration Method: Supports single addition and batch import addition.
配置方法：支持单个添加， 也支持批量导入添加。

Case 1
案例
All Intranet access to 192.168.88.12 is blocked.
阻断内网中对 192.168.88.12 的全部访问

This configuration only blocks access to 192.168.88.12 that does not belong to this LAN port. Not valid under the same network segment.
该配置只阻断不属于 192.168.88.12 这个 LAN 口对 192.168.88.12 的访问。同一网段下的不生效。

Case 2
案例 2
IP address 192.168.88.99 is blocked from accessing the Internet.
阻止 IP 192.168.88.99 上网

It can also block a certain IP segment from accessing the external network.Individual IP access the external network, while others cannot access it.
还可以阻断某个 IP 段访问外网；个别 IP 访问外网，其他的不能访问。