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Configuration Guide - Security

S9300, S9300E, and S9300X V200R011C10

This document describes the configurations of Security, including ACL, reflective ACL, local attack defense, MFF, attack defense, traffic suppression and storm control, ARP security, port security, DHCP snooping, ND snooping, PPPoE+, IPSG, SAVI, URPF, keychain, separating the management plane from the service plane, security risks.
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Applying an Advanced ACL

Applying an Advanced ACL

Context

After an ACL is configured, it must be applied to a service module so that the ACL rules can be delivered and take effect.

Usually, an ACL is applied to a traffic policy or simplified traffic policy. This enables the device to deliver ACL rules globally, in a VLAN, or on an interface to filter packets to be forwarded. In addition, an ACL can be applied to the service modules such as FTP and multicast.

Procedure

  1. Apply an advanced ACL

    Table 1-22 describes the application of an advanced ACL.

    Table 1-22  Applying an advanced ACL
    Service Category Usage Scenario How ACLs Are Used

    Filtering packets to be forwarded

    The device filters received packets globally, on an interface, or in a VLAN, and then discards, modifies priorities of, or redirects the filtered packets.

    For example, you can use ACL to reduce the service level for the bandwidth-consuming services, such as P2P downloading and online video. When network congestion occurs, these packets are discarded first.

    • Simplified traffic policy: See ACL-based Simplified Traffic Policy Configuration in the S9300, S9300E, and S9300X V200R011C10 Configuration Guide - QoS.

    • Traffic policy: See MQC Configuration in the S9300, S9300E, and S9300X V200R011C10 Configuration Guide - QoS.

    Filtering packets to be sent to the CPU

    If too many protocol packets are sent to the CPU, the CPU usage increases and CPU performance degrades. The device restricts the packets to be sent to the CPU.

    For example, when a user sends a large number of ARP attack packets to the device, the CPU is busy and service is interrupted. You can apply an ACL to the local attack defense service, and add the user to the blacklist so that the CPU discards the packets from this user.

    Blacklist: See Configuring a Blacklist in Local Attack Defense Configuration.

    Login control

    The device controls access permission of users. Only authorized users can log in to the device, and other users cannot log in without permission. This ensures network security.

    • Telnet: See Enabling the Telnet Server Function in "CLI Login Configuration" in the S9300, S9300E, and S9300X V200R011C10 Configuration Guide - Basic Configuration.

    • FTP: See Managing Files When the Device Functions as an FTP Server in "File Management" in the S9300, S9300E, and S9300X V200R011C10 Configuration Guide - Basic Configuration.

    • SFTP: See Managing Files When the Device Functions as an SFTP Server in "File Management" in the S9300, S9300E, and S9300X V200R011C10 Configuration Guide - Basic Configuration.

    • HTTP: See Configuring Access Control on Web Users in "Web System Login Configuration" in the S9300, S9300E, and S9300X V200R011C10 Configuration Guide - Basic Configuration.

    Route filtering

    An ACL can be applied to the multicast protocol to filter multicast groups.

    For example, the ACL and IGMP snooping functions can be used together to prevent hosts in a VLAN from joining a multicast group.

    Multicast: See Configuring a Multicast Group Policy in "IGMP Snooping Configuration" and (Optional) Configuring the Range of Multicast Groups That an Interface Can Join in "IGMP Configuration" in the S9300, S9300E, and S9300X V200R011C10 Configuration Guide - IP Multicast.

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Updated: 2019-04-01

Document ID: EDOC1000178410

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