Administrator Guide

psh: push function
rst: reset the connection
syn: synchronize sequence numbers
urg: urgent eld
ttl Enter the keyword ttl to permit 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.
neq(not equal to) — matches packets that contain a ttl value that is not equal to the
specied ttl value.
gt(greater than) — matches packets that contain a ttl value that is greater than the
specied ttl value.
lt (less than) — matches packets that contain a ttl value that is less than the
specied ttl value.
range(inclusive range of values) — matches packets that contain a ttl value that
falls between the specied range of ttl values.
dscp Enter the keyword dscp to permit a packet based on the DSCP value. The range is from
0 to 63.
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 ports for the port parameter)
port port 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.
mask 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.
count (OPTIONAL) Enter the keyword count to count packets the lter processes.
byte (OPTIONAL) Enter the keyword byte to count bytes the lter processes.
order (OPTIONAL) Enter the keyword order to specify the QoS priority for the ACL entry.
The range is from 0 to 254 (where 0 is the highest priority and 254 is the lowest; lower-
order numbers have a higher priority). If you do not use the keyword order, the ACLs
have the lowest order by default (255).
fragments Enter the keyword fragments to use ACLs to control packet fragments.
214 Access Control Lists (ACL)