TP-Link T2600G-18TSTL-SG3216 T2600G-18TSUN V1 Configuration Guide - Page 700

Configuring ACL 1 Overview Overview 1.1 Introduction The rapid growth of network size and traffic brings challenges to network security and bandwidth allocation. Packet filtering can help prevent unauthorized access behaviors, limit network traffic and improve bandwidth use. ACL (Access Control List) filters traffic as it passes through a switch, and permits or denies packets crossing specified interfaces or VLANs. It accurately identifies and processes the packets based on the ACL rules. In this way, ACL helps to limit network traffic, manage network access behaviors, forward packets to specified ports and more. It is usually applied in the following situations:  To prevent various network attacks, such as attacks on IP (Internet Protocol), TCP (Transmission Control Protocol), and ICMP (Internet Control Message Protocol) packets.  To manage network access behaviors, such as controlling access to a network or to specific resources on your network.  To limit network traffic and improve network performance by, for example, controlling the uploading and downloading bandwidth. 1.2 Supported Features »» ACL Binding To"permit" or "deny" received packets, bind the ACL to a port or a VLAN so that the ACL takes effect on the port or VLAN. The packets that match a permit rule or deny rule will be forwarded or dropped. »» Policy Binding Configure Policy if you need to further process the matched packets, through operations such as mirroring, rate-limiting, redirecting, or changing priority. The Policy takes effect after it is bound to a port or a VLAN. Configuration Guide 670