Reference Guide

mask 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 then the IP address to specify a host IP
address.
dscp Enter this keyword dscp to deny a packet based on the DSCP value.
The range is from 0 to 63.
bit Enter a flag or combination of bits:
• ack: acknowledgement field
• fin: finish (no more data from the user)
• psh: push function
• rst: reset the connection
• syn: synchronize sequence numbers
• urg: urgent field
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 command)
port port
Enter the application layer port number. Enter two port numbers if
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 /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.
count (OPTIONAL) Enter the keyword count to count packets the filter
processes.
byte (OPTIONAL) Enter the keyword byte to count bytes the filter
processes.
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