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CLI-based Configuration Guide - Security

AR500, AR510, and AR530 V200R007

This document describes the configurations of Security, including AAA, DAA,NAC, BRAS Access, ACL, Firewall, Deep Security Defense, Local Attack Defense;Attack Defense, Traffic Suppression, ARP Security, Port Security, DHCP Snooping, IPSG, URPF, PKI, SSL, HTTPS, Keychain, separating the management plane from the service plane, security risks.
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This section provides the definition, purpose, and benefits of DHCP snooping.


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


Some attacks are launched on DHCP (RFC 2131). These attacks include the bogus DHCP server attack, DHCP server DoS attack, and bogus DHCP message attack.

DHCP snooping is equivalent to a firewall between DHCP clients and the DHCP server to prevent DHCP attacks on the network, ensuring security for communication services.


  • The device can defend against DHCP attacks on the network. The DHCP attack defense capability enhances device reliability and ensures stable network operating.
  • Users are provided with more stable services on a more secure network.
Updated: 2019-05-25

Document ID: EDOC1000097287

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