Users Guide

address} [operator [portnumber ]] [ttl operator] [count [byte] | log] [dscp
value] [ecn value] [fragments] [monitor [session-ID]] [no-drop] [order]
Parameters
sequence-number Enter a number from 0 to 4294967290.
deny Enter the keyword deny to congure a lter to drop packets meeting this condition.
permit Enter the keyword permit to congure a lter to forward packets meeting this criteria.
ip-protocol-number Enter a number from 0 to 255 to lter based on the protocol identied in the IP protocol
header.
icmp Enter the keyword icmp to congure an ICMP access list lter.
ip Enter the keyword ip to congure a generic IP access list. The keyword ip species that
the access list permits all IP protocols.
tcp Enter the keyword tcp to congure a TCP access list lter.
udp Enter the keyword udp to congure a UDP access list lter.
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 /prex format (/x) or A.B.C.D. The mask, when
specied 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 lter.
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.)
portnumber (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-DATA and FTP
• 25 = SMTP
• 169 = SNMP
destination Enter the IP address of the network or host to which the packets are sent.
ttl Enter the keyword ttl to permit or deny a packet based on the time to live value. The
range is from 1 to 255.
operator Enter one of the following logical operand:
• eq(equal to) — matches packets that contain a ttl value that is equal to the specied
ttl value.
246 Access Control Lists (ACL)