Reference Guide

Version 8.3.1.0 Added the keyword dscp.
Version 8.2.1.0 Allows ACL control of fragmented packets for IP (Layer 3)
ACLs.
Version 8.1.1.0 Introduced on the E-Series ExaScale.
Version 7.4.1.0 Added support for non-contiguous mask and added the
monitor option.
Version 6.5.1.0 Expanded to include the optional QoS order priority for the
ACL entry.
Usage
Information
The order option is relevant in the context of the Policy QoS feature only. For
more information, refer to the Quality of Service chapter of the Dell Networking OS
Configuration Guide.
The monitor option is relevant in the context of flow-based monitoring only. For
more information, refer to the Port Monitoring chapter.
When you use the log option, the CP processor logs details the packets that
match. Depending on how many packets match the log entry and at what rate, the
CP may become busy as it has to log these packets’ details.
deny tcp
Configure a filter that drops transmission control protocol (TCP) packets meeting the filter criteria.
S4820T
Syntax
deny tcp {source mask | any | host ip-address} [bit] [operator
port [port]] {destination mask | any | host ip-address} [dscp]
[bit] [operator port [port]] [count [byte] | log] [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 tcp {source mask | any | host ip-address}
{destination mask | any | host ip-address} command.
Parameters
source Enter the IP address of the network or host from which the
packets are 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.
Access Control Lists (ACL)
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