Reference Guide

Security | 1381
permit tcp
e
Configure a filter to pass TCP packets meeting the filter criteria.
Syntax
permit
tcp {source mask | any | host ip-address} [operator port [port]] {destination mask |
any | host ip-address} [operator port [port]] [count [byte]] | log] [order number]
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
Defaults
Not configured.
Command Modes
TRACE LIST
source
Enter the IP address of the network or host from which the packets were
sent.
mask
(OPTIONAL) Enter a network mask in /prefix format (/x).
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.
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.)
port port Enter the application layer port number. Enter two port numbers if
using the range logical operand.
Range: 0 to 65535.
The following list includes some common TCP port numbers:
23 = Telnet
20 and 21 = FTP
25 = SMTP
169 = SNMP
destination
Enter the IP address of the network or host to which the packets are
sent.
count
(OPTIONAL) Enter the keyword count to count packets processed by
the filter.
byte
(OPTIONAL) Enter the keyword byte to count only bytes processed by
the filter.
log
(OPTIONAL) Enter the keyword log to have the information kept in a
Trace-list log file.
order number
(OPTIONAL) Enter the keyword order followed by a number from 0 to
7 as the order number.