Common Classifiers
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•
The “
from
” keyword in TCP and UDP protocols refer to the source port.
•
The keyword “
type
” is used to access the ALGs.
•
There is no ordering of rules inside a match-list. All the rules are of same priority.
The rule numbers are used only for reference.
•
The ordering of keywords after the initial protocol and source/destination fields is
not defined, and can be in any order. Some keywords are mutually exclusive, and/
or dependant on other keywords e.g the service specification is only applicable for
TCP or UDP packets, and is mutually exclusive with the fragment keyword.
•
The usage of the AH and ESP keywords are similar to IP protocol. Their
applications are usually in the security domains.
•
The protocol keyword is used to assign a number to the protocol types in use. The
protocol name to number mapping can be found at http://www.iana.org/
assignments/protocol-numbers.
T
O
C
ONFIGURE
A
R
ULE
E
XAMPLE
ALU(config-match-list-test)# 10 tcp host 1.1.1.1/32 any from
6050 to 80
The above concept can be made clear by referring to the following examples:
E
XAMPLE
E
X
1:
To classify traffic coming from network 192.168.10.0/24 and going to
192.168.11.0/24, the match-list would look as shown below.
ALU(config)# match-list m1
ALU(config-match-list-m1)# tcp prefix 192.168.10.0/24 prefix
192.168.11.0/24 service ssh
Command (in Match-list CM)
Description
[<
1-65535>
] [<
protocol>
]
[
<source>
] [
<destination>
]
[
from
<
port number>
] [
to
<
port
number>
]] [
<fields to be
matched>
]
This command is used to configure a
rule for protocols like IP, TCP, UDP,
etc.
Содержание OmniAccess 700
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