ZyXEL Communications P-1100 - Manual (Page 85)

Prestige 1100 Internet Access Router
Filter Configuration 8-13
Field Description Option
Source Socket # Enter the source socket number (2-byte in hexadecimal)
of the packets that you wish to filter. e.g.,7777
Source Socket # Comp Select the comparison you wish to apply to the source
socket in the packet against that specified above. [None]/[Equal]/
[Not
Equal]/[Less]/[
Greater]
Operation This field is applicable only if one of the Socket # fields is
0452 or 0453 indicating SAP and RIP packets. There are
seven options for this field that specify the type of the
packet. [None]
[RIP Request]
[RIP
Response]
[SAP Request]
[SAP
Response]
[SAP Get
Nearest Server
Request]
[SAP Get
Nearest Server
Response]
Once you have completed filling in Menu 21.1.1 - IPX Filter Rule, press [Enter] at the message [Press
Enter to Confirm] to save your configuration, or press [Esc] to cancel. This data will now be displayed on
Menu 21.1 - Filter Rules Summary.
8.4.4 Device Filter Rule
This section shows you how to configure a device filter rule. The purpose of device rules is to allow you to
filter non-IP/IPX packets. For IP and IPX, it is generally easier to use the protocol rules directly.
For Device rules, the Prestige treats a packet as a byte stream as opposed to an IP or IPX packet. You
specify the portion of the packet to check with the Offset (from 0) and the Length fields, both in bytes. The
Prestige applies the Mask (bit-wise ANDing) to the data portion before comparing the result against the
Value to determine a match. The Mask and Value are specified in hexadecimal numbers. Note that it takes
two hexadecimal digits to represent a byte, so if the length is 4, the value in either field will take 8 digits,
e.g., FFFFFFFF.
To configure a device rule, select Device Filter Rule in the Filter Type field and press [ENTER] to open
Menu 21.1.1 - Device Filter Rule, as shown below.