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Configuration Guide - Security

S7700 and S9700 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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Overview of DHCP Snooping

Overview of DHCP Snooping

Definition

The Dynamic Host Configuration Protocol (DHCP) snooping feature ensures that DHCP clients obtain IP addresses only from authorized DHCP servers and a DHCP snooping-enabled device records mappings between IP addresses and MAC addresses of DHCP clients, preventing DHCP attacks on the network.

Purpose

DHCP defined in RFC 2131 is susceptible to certain attacks, such as a bogus DHCP server attack, DHCP server DoS attack, and bogus DHCP message attack.

DHCP snooping functions as a firewall between DHCP clients and the DHCP server to prevent DHCP attacks on the network, facilitating security for communication services.

Benefits

  • A DHCP snooping-enabled device can defend against DHCP attacks on the network. This enhances device reliability and network stability.
  • Service stability and network security are improved.
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Updated: 2019-04-01

Document ID: EDOC1000178319

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