Filter
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ip-protocol-
number
Enter a number from 0 to 255 to filter based on the protocol
identified in the IP protocol header.
icmp Enter the keyword icmp to configure an ICMP access list
filter.
ip Enter the keyword ip to configure a generic IP access list.
The keyword
ip specifies that the access list permits 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 an IP address in dotted decimal format of the network
from which the packet was received.
mask (OPTIONAL) 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 and then enter the IP address to
specify a host IP address or hostname.
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 you are using the range logical operand.
The range is from 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 the
filter processes.
byte (OPTIONAL) Enter the keyword byte to count bytes the filter
processes.
Access Control Lists (ACL)
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