Command Line Reference Guide

232 | Access Control Lists (ACL)
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The monitor option is relevant in the context of the flow-based monitoring feature only. See
Chapter 45, Port Monitoring.
permit tcp
c e s
Configure a filter to pass TCP packets meeting the filter criteria.
Syntax
permit tcp {source mask | any | host ip-address} [bit] [operator port [port]] {destination mask
| any | host ip-address} [bit] [dscp] [operator port [port]] [count [byte] | log] [order] [monitor]
[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 permit tcp {source mask | any | host ip-address} {destination mask | any |
host ip-address} command.
Parameters
Note: When ACL logging and byte counters are configured simultaneously, byte counters
may display an incorrect value. Configure packet counters with logging instead.
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.
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
dscp
Enter this keyword to deny a packet based on DSCP value.
Range: 0-63
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 port for the port
parameter.)