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Configuration Guide - Security

CloudEngine 8800, 7800, 6800, and 5800 V200R005C10

This document describes the configurations of Security, including ACL, local attack defense, MFF, attack defense, traffic suppression and storm control, ARP security, Port security, DHCP snooping, ND snooping, PPPoE+, IPSG, SAVI, separating the management plane from the service plane, security risks.
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Packet Fragmentation Supported by ACLs

Packet Fragmentation Supported by ACLs

The device can filter fragmented packets by matching fragmented packets with Layer 3 filtering rules.

  • If fragment is not specified in an ACL rule, the device matches non-initial fragmented packets in addition to non-fragmented packets and initial-fragmented packets (they are processed using the same method).

  • If fragment is specified in the ACL rule, the device only matches non-initial fragmented packets.

When attackers construct fragmented packets to attack the network, you can specify fragment in an ACL rule to enable the device to filter non-initial fragmented packets only. This prevents the device from filtering other non-fragmented packets, ensuring normal service transmission.

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Updated: 2019-04-20

Document ID: EDOC1100074765

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