ZyXEL Communications Prestige 128IMH, User Manual, Page: 99 / 142

Prestige 128IMH User’s Guide ZyXEL
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Page 12-7
filter. The address is usually written in dotted decimal notation such
as a.b.c.d where a, b, c and d are numbers between 0 and 255.
Source: IP Mask In this field, enter in the IP mask that is used to mask the bits of the
IP Address given in Source: IP Addr.
Source: Port # Enter the source port of the packets that you wish to filter. The range
of this field is 0 to 65535.
Source: Port #
Comp In this field, you can select what comparison quantifier you wish to
use to compare to the value given in Source: Port #. There are five
choices for this field. None, Less, Greater, Equal, Not Equal.
TCP Estab This field is dependent upon the IP Protocol field. This field is
inactive (N/A) unless the value in that field is 6 (TCP protocol). In
this field, you determine what type of TCP packets to filter. There are
two choices:Yes filter match only established TCP connections.No
filter match both initial and established TCP connections.
More
If More is Yes, then Action Matched and Action Not Matched will
be N/A.
Log In this field, you can determine if you wish to log the results of
packets attempting to pass the filter rule. These results are displayed
on the System Log (see Chapter 15). There are 4 choices for this
field: None, Action Matched, Action Not Matched, and Both
.
Action Matched If the conditions for the filter rule are met, you can specify what to do
with the packet. There are three choices for this field: Check Next
Rule, Forward and Drop.
Action Not Matched If the conditions for the filter rule are not met, you can specify what
to do with the packet. There are three choices for this field: Check
Next Rule, Forward and Drop.
Table 12-1 Menu 21.1.1 - TCP/IP Filter Rule Fields
Once you have completed filling in Menu 21.1.1 - TCP/IP Filter Rule, press ENTER at
the message: ‘Press ENTER to Confirm...’ to save your configuration or press ESC at any
time to cancel. This data will now be displayed on Menu 21.1 - Filter Rules Summary.
12.4.2. Generic Filter Rule
This section shows you how to configure the protocol-independent parameters for a Generic
filter rule for your Prestige. For information on the protocol-dependent fields, refer to the
previous section, ‘TCP/IP Filter Rule’.