Administrator Guide

Related
Commands
deny tcp — assigns a filter to deny TCP packets.
deny udp — assigns a filter to deny UDP packets.
ip access-list extended — creates an extended ACL.
deny icmp
To drop all or specific internet control message protocol (ICMP) messages, configure a filter.
C9000 Series
Syntax
deny icmp {source–ip—address mask | any | host ip-address} {destination mask |
any | host ip-address} [log] [dscp] [[count [bytes]] [order] [monitor]
[fragments]
To remove this filter, you have two choices:
• Use the no seq sequence-number command if you know the filter’s sequence number.
• Use the no deny icmp {source–ip—address mask | any | host ip-address}
{destination mask | any | host ip-address} command.
Parameters
source-ip-address Enter the IP address of the network or host from which the packets were sent.
mask Enter a network mask in /prefix format (/x) or A.B.C.D. The mask, when specified in
A.B.C.D format, may be either contiguous or non-contiguous.
any Enter the keyword any to specify that all routes are subject to the filter.
host ip-address Enter the keyword host then the IP address to specify a host IP address.
destination Enter the IP address of the network or host to which the packets are sent.
log (OPTIONAL) Enter the keyword log to include ACL matches in the log.
dscp Enter this keyword dscp to deny a packet based on the DSCP value. The range is from 0
to 63.
count (OPTIONAL) Enter the keyword count to count packets processed by the filter.
bytes (OPTIONAL) Enter the keyword bytes to count bytes processed by the filter.
order (OPTIONAL) Enter the keyword order to specify the QoS priority for the ACL entry.
The range is from 0 to 254 (where 0 is the highest priority and 254 is the lowest; lower
order numbers have a higher priority) If you did not use the keyword order, the ACLs
have the lowest order by default (255).
monitor (OPTIONAL) Enter the keyword monitor when the rule is describing the traffic that you
want to monitor and the ACL in which you are creating the rule is applied to the
monitored interface. For more information, refer to the “Flow-based Monitoring” section
in the Port Monitoring chapter of the Dell Networking OS Configuration Guide.
fragments Enter the keyword fragments to use ACLs to control packet fragments.
Defaults Not configured.
Command Modes CONFIGURATION-EXTENDED-ACCESS-LIST
Command History
This guide is platform-specific. For command information about other platforms, refer to the relevant Dell
Networking OS Command Line Reference Guide.
The following is a list of the Dell Networking OS version history for this command.
Version Description
9.9(0.0) Introduced on the C9010.
9.2(1.0) Introduced on the Z9500.
8.3.19.0 Introduced on the S4820T.
224 Access Control Lists (ACL)