Reference Guide

126 | Access Control Lists (ACL)
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Usage
Information
The order option is relevant in the context of the Policy QoS feature only. See the “Quality of
Service” chapter of the FTOS Configuration Guide for more information.
deny tcp
s z
Configure a filter that drops TCP packets meeting the filter criteria.
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]] [order] [fragments]
To remove this filter, you have two choices:
• Use the no seq sequence-number command syntax if you know the filter’s sequence number or
• Use the no deny tcp {source mask | any | host ip-address} {destination mask | any | host
ip-address} command.
Parameters
Version 8.3.1.0
Added
dscp keyword.
Version 8.2.1.0 Allows ACL control of fragmented packets for IP (Layer 3) ACLs.
Version 6.5.10
Expanded to include the optional QoS
order priority for the ACL entry.
S6000
source
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 followed by the IP address to specify a host IP
address.
dscp
Enter this keyword to deny a packet based on DSCP value.
Range: 0-63
bit
Enter a flag or combination of bits:
ack: acknowledgement field
fin: finish (no more data from the user)
psh: push function
rst: reset the connection
syn: synchronize sequence numbers
urg: urgent field
operator
(OPTIONAL) Enter one of the following logical operand:
•
eq = equal to
•
neq = not equal to
•
gt = greater than
•
lt = less than
•
range = inclusive range of ports (you must specify two ports for the port
command parameter.