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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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Discarding IP Packets with Identical Source and Destination IP Addresses

Discarding IP Packets with Identical Source and Destination IP Addresses

Context

In specific scenarios, IP packets with identical source and destination IP addresses may be valid. For example, a network administrator may construct these packets for internal tests. By default, the device forwards such packets.

If you detect an abnormal volume of these packets and suspect a LAND attack may occur, configure this function to discard the suspect packets.

Procedure

  1. Run the system-view command to enter the system view.
  2. Run the ip anti-attack source-ip equals destination-ip drop { all | slot slot-id } command to discard the IP packets with identical source and destination IP addresses.

    By default, a switch forwards the IP packets with identical source and destination IP addresses.

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Updated: 2019-04-01

Document ID: EDOC1000178410

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