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CLI-based Configuration Guide - Security

AR500, AR510, AR531, AR550, AR1500, and AR2500 V200R010

This document provides the basic concepts, configuration procedures, and configuration examples in different application scenarios of the network management feature supported by the device.
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Configuring Defense Against Bogus DHCP Server Attacks

Configuring Defense Against Bogus DHCP Server Attacks

Context

After DHCP snooping is enabled and a trusted interface is configured, the device ensures DHCP clients obtain IP addresses from the authorized DHCP server, preventing attacks from bogus DHCP servers. However, the location of the bogus DHCP server cannot be detected, meaning the network security is still at risk.

After DHCP server detection is enabled, the DHCP snooping-enabled device checks information about the DHCP server, such as its IP address and connecting port number, in the DHCP Reply messages and records the information in the log. You can refer to these logs to check whether bogus DHCP servers exist on the network.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run dhcp server detect

    DHCP server detection is enabled.

    By default, detection of DHCP servers is disabled.

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Updated: 2019-05-20

Document ID: EDOC1100034236

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