Figure 9, The zgate filtering list – Zilog EZ80F91GA User Manual
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ZGATE Embedded Security Development Kit
User Manual
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discarded. If the filtering mode is Blacklist, ZGATE will route the packet to ZTP if a spe-
cific field in that packet does not match any of the entries in the corresponding filtering
list. For example, in the context of TCP Port numbers, ZGATE will only forward the
received TCP packets to ZTP if the destination TCP Port number does not match any of
the values displayed in the list.
It is not possible to change the filtering mode of any of the ZGATE static filtering lists.
This setting is determined by the persistent configuration information ZGATE reads dur-
ing system startup; these settings can be viewed using the Startup Settings navigation link.
To learn more, refer to the
Altering the ZGATE Static Configuration Settings
Maximum List Size indicates the maximum number of entries that the corresponding fil-
tering list can hold. After the size of a list reaches its maximum, it is no longer possible to
add new entries to the list unless one of the existing entries is first removed. If the filtering
mode is disabled, the list size will be shown as 0.
The middle of the page displays text that describes how ZGATE uses the filtering list. If
the filtering mode is Disabled, nothing else is displayed on the page. Otherwise, another
paragraph will be displayed, containing instructions about how to use the Add/Update and
Cancel buttons. These buttons are not displayed when the filtering mode is set to Disabled.
Following the text is the filtering list. Each entry in the filtering list (displayed within the
input field) is numbered, starting at 1 and incrementing to Maximum List Size. When
ZGATE searches the filtering list, it will first look at Item 1 for a match, then Item 2 and so
forth, until a match is found or the end of the list is reached.
To add an entry to the list, click the
Add
button. As a result, a new (empty) input field will
be displayed at the bottom of the page, as indicated in Figure 9.
Figure 9. The ZGATE Filtering List