Remote Access Router User's Guide

DI-1162 Remote Access Router
70 Configuration and Management
after the preamble. The range of the Offset parameter is from 0 to
255 octets. The first byte in a packet has an offset 0.
•
Length – this is the number of bytes (octets) from the offset value
(the
Offset
reference byte).
• Value – this is a 16 digit, hexadecimal field, defining the actual bit
values used to compare with the frame data, at the specified
(
Offset
+
Length
) position.
•
Mask – this is a 16 digit, hexadecimal bit mask, used as an
operand in the bit-wise AND operation that will be applied to the
Value
parameter.
IP Filter
The
IP Filter
is specifically an IP protocols filter, allowing you to,
among other things, firewall your LAN, prohibiting specific packets
from entering your LAN. It is necessary to have good knowledge of IP
protocol before effectively configuring this filter.
The IP Filter parameters are described below: