Chapter 17: IP Packet Filters, Subscriber Management
STANDARD Revision 1.0
C4® CMTS Release 8.3 User Guide
© 2016 ARRIS Enterprises LLC. All Rights Reserved.
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The value range for IP protocols is 0-257.
Common Protocol Values
Some common protocol values are provided in the table below.
Table 75.
Common Protocol Values
IP Protocol
Description
1
ICMP
6
TCP
17
UDP
256
Any protocol
257
UDP and TCP (See note)
All protocols
Listed in /etc/protocols on any UNIX system
Note: If the operation mode is set to enbudptcpfltr (see
UDP and TCP Filtering in Same Filter
(page 572)), and the ip-
proto value is set to 257, then combined UDP and TCP filtering is enabled. If the operation mode enbudptcpfltr is reset,
then the ip-proto value cannot be set to 257 and combined UDP and TCP filtering is disabled.
IP Protocol Filter Command Examples
These commands provide drop examples pertaining to IP protocol Filter commands.
The following command example filter drops all ICMP packets:
configure cable filter group 20 index 1 ip-proto 1 match-action drop
The following command example filter drops all TCP packets originating at a specific source port and meant for a specific
destination port:
configure cable filter group 20 index 2 ip-proto 6 src-port mmm dest-port nnn action drop
Where: mmm and nnn are the numbers of the ports.