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Chapter 11 Filter configuration
N0115791
Configuring a Generic Filter Rule
This section shows you how to configure a generic filter rule. With generic rules
you can filter non-IP packets. For IP packets, it is generally easier to use the IP
rules directly.
For generic rules, the BCM50a Integrated Router 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 BCM50a
Integrated Router applies the Mask (using the bit-wise-AND action) 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, for example,
FFFFFFFF
.
To configure a generic rule, select
Generic Filter Rule
in the
Filter Type
field
in menu 21.1.1.1 and press
[ENTER]
to open
Generic Filter Rule
, as shown in
Figure 59
.
Summary of Contents for BCM50a
Page 18: ...18 Figures N0115791 ...
Page 22: ...22 Tables N0115791 ...
Page 28: ...28 Preface N0115791 ...
Page 44: ...44 Chapter 2 Introducing the SMT N0115791 SMT menus at a glance Figure 6 SMT overview ...
Page 52: ...52 Chapter 2 SMT menu 1 general setup N0115791 ...
Page 64: ...64 Chapter 4 LAN setup N0115791 ...
Page 68: ...68 Chapter 5 Internet access N0115791 ...
Page 82: ...82 Chapter 6 Remote Node setup N0115791 ...
Page 114: ...114 Chapter 9 Network Address Translation NAT N0115791 ...
Page 140: ...140 Chapter 12 SNMP Configuration N0115791 ...
Page 144: ...144 Chapter 13 System security N0115791 ...
Page 160: ...160 Chapter 14 System information and diagnosis N0115791 ...
Page 174: ...174 Chapter 15 Firmware and configuration file maintenance N0115791 ...
Page 188: ...188 Chapter 17 Remote Management N0115791 ...
Page 208: ...208 Appendix B Triangle Route N0115791 ...
Page 228: ...228 Appendix D PPPoE N0115791 ...
Page 230: ...230 Appendix E Hardware specifications N0115791 ...
Page 240: ...240 Appendix F IP subnetting N0115791 ...
Page 278: ...278 Appendix G Command Interpreter N0115791 ...
Page 308: ...308 Appendix J Log descriptions N0115791 ...
Page 310: ...310 Appendix K Brute force password guessing protection N0115791 ...