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mask
any
host ip-address
bit
dscp
operator
port port
destination
mask
count
Access Control Lists (ACL)
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.
Enter the keyword any to specify that all routes are subject
to the filter.
Enter the keyword host then the IP address to specify a host
IP address.
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
Enter the keyword dscp to deny a packet based on the
DSCP value. The range is from 0 to 63.
(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)
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
Enter the IP address of the network or host to which the
packets are sent.
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.
(OPTIONAL) Enter the keyword count to count packets the
filter processes.
171
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