Reference Guide

1342 | Security
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Syntax
seq
sequence-number {deny | permit} {ip-protocol-number | ip | tcp | udp} {source mask | any | host
ip-address} {destination mask | any | host ip-address} [operator port [port]] [precedence precedence]
[
tos tos-value] [count [byte] | log]
To delete a filter, use the
no seq sequence-number command.
Parameters
sequence-number
Enter a number from 0 to 65535.
deny
Enter the keyword deny to configure a filter to drop packets
meeting this condition.
permit
Enter the keyword permit to configure a filter to forward packets
meeting this criteria.
ip-protocol-number
Enter a number from 0 to 255 to filter based on the protocol
identified in the IP protocol header.
ip
Enter the keyword ip to configure a generic IP access list. The
keyword ip specifies that the access list will permit all IP
protocols.
tcp
Enter the keyword tcp to configure a TCP access list filter.
udp
Enter the keyword udp to configure a UDP access list filter.
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 operands:
• 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 parameter.)
port port (OPTIONAL) 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.
precedence precedence Enter the keyword precedence followed by a number from 0 to 7
as the precedence value.
tos tos-value Enter the keyword tos followed by a number from 0 to 15 as the
TOS value.