ZyXEL Communications P-1100 manual Device Filter Rule, Sap

Prestige 1100 Internet Access Router

Field	Description	Option
Source Socket #	Enter the source socket number (2-byte in hexadecimal)	e.g.,7777
	of the packets that you wish to filter.
Source Socket # Comp	Select the comparison you wish to apply to the source	[None]/[Equal]/
	socket in the packet against that specified above.	[Not
		Equal]/[Less]/[
		Greater]
Operation	This field is applicable only if one of the Socket # fields is	[None]
	0452 or 0453 indicating SAP and RIP packets. There are	[RIP Request]
	seven options for this field that specify the type of the
	packet.	[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.

8.4.4Device 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.

Filter Configuration 8-13