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Overview of Packet Filtering
Modular QoS Command-Line Interface (MQC) implements packet filtering.
There are many untrusted packets on networks. An untrusted packet is a packet with potential security risks or a packet that users do not want to receive. The packet filtering function allows a device to directly discard untrusted packets to improve network security.
With MQC, a device is configured to identify untrusted packets and discard them, as well as identify trusted packets and permit them to pass through.
MQC-based packet filtering classifies packets in a more precise manner than a blacklist, and is more flexible to deploy.