User manual

8-6 Packet Filter

Generic Filters

Generic filters are protocol-independent and are specified by

byte and offset values in a packet. Packets are filtered by

comparing the packet’s offset value and byte information with

the values that you define in the filter. The NETServer will

accept or reject the packet based on the result.

Note: Creating generic filters can be a complex task. Only

experienced users should employ generic filters, and strictly in

cases where data and advertising filters cannot provide the

filtering capabilities that you require.

Creating Filters

The NETServer performs packet filtering based on packet filters

that you create. This section describes how to create the packet

filters used by the NETServer, and includes the following topics:

• Filter File Components

• Creating Filter Files

Filter File Components

You define the filtering rules used by the NETServer within

filter files. Filter files are text files that are stored in the

NETServer FLASH memory. You can create and modify filter

files using:

• Windows-based Access Router Manager application

(recommended)

• An off-line text editor

Note: For information about using the Access Router Manager

application to create, configure, and manage NETServer filters,

refer to the Access Router Manager documentation.