STANDARD Revision 1.0
C4® CMTS Release 8.3 User Guide
© 2016 ARRIS Enterprises LLC. All Rights Reserved.
560
Chapter 17
IP Packet Filters, Subscriber Management
Overview .......................................................................................... 560
IP Packet Filtering ............................................................................. 560
Upstream Drop Classifiers ................................................................ 583
Overview
Filtering out packets destined for infrastructure components allows an MSO to reduce the risk of outside break-ins, such as
denial-of-service attacks. Separate configuration files referencing different filter groups could be used as part of a multiple
Internet Service Provider (ISP) application.
IP Packet Filtering
IP packet filtering provides a way for the network administrator to precisely define how incoming IP traffic is managed. IP
packet filtering is an important element in maintaining the integrity of C4/c CMTS traffic. The IP Packet Filtering feature is
based on DOCSIS Subscriber Management Filtering.
Note: Downstream traffic cannot be filtered by matching on IP destinations for the host address 255.255.255.255
(broadcast) or the 224.0.0.0/4 range (multicast).
