Reference Guide

1330 | Security
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seq
e
Assign a sequence number to a deny or permit filter in a trace list while creating the filter.
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.
count (OPTIONAL) Enter the keyword count to count packets processed by
the filter.