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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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Summary of IPSG Configuration Tasks

Summary of IPSG Configuration Tasks

Table 12-6 lists IPSG configuration tasks. The tasks are independent of each other. You can select one task or a combination of tasks according to service requirements.

Table 12-6  IPSG configuration tasks
Task

Description

Reference

Configure IPSG based on a static binding table.

If a LAN has a small number of hosts and the hosts use static IP addresses, you can configure IPSG based on a static binding table. Then, IPSG can filter the IP packets received by untrusted interfaces, and effectively prevent malicious hosts from stealing authorized hosts' IP addresses to access the network without permission.

Configuring IPSG Based on a Static Binding Table

Configure IPSG based on a dynamic binding table.

If a LAN has a large number of hosts or the hosts obtain IP addresses through DHCP, you can configure IPSG based on a dynamic binding table. Then, IPSG can filter the IP packets received by untrusted interfaces, and effectively prevent malicious hosts from stealing authorized hosts' IP addresses to access the network without permission.

Configuring IPSG Based on a Dynamic Binding Table

Configure the switch to generate snooping MAC entries based on the binding table.

IPSG based on a static or dynamic binding table can prevent hosts with unauthorized MAC addresses from accessing the network. However, the switch may learn or update MAC entries incorrectly, causing MAC address flapping.

After this task is performed on an interface, the interface does not learn MAC entries, and the switch generates snooping MAC entries based on the binding table.

Configuring the Generation of Snooping MAC Entries Based on the Binding Table

Configure the switch to discard IP packets with identical source and destination IP addresses.

IP packets with identical source and destination IP addresses may be attack packets (for example, if the traffic volume is high, a LAND attack may be occurring). After confirming that such packets are attack packets, perform this task to discard them.

Discarding IP Packets with Identical Source and Destination IP Addresses

Configure IP Source Trail.

When a host is attacked, you can configure IP Source Trail on the switch to which the host connects to count the number of packets sent to the host, and then determine the attack source.

Configuring IP Source Trail
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Updated: 2019-04-01

Document ID: EDOC1000178410

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