User`s guide

Contents
ix
CHAPTER 5 FILTERS
5.1 FILTERING AND PERFORMANCE CONSIDERATIONS ...............5-2
5.2 USING FILTERS FOR SECURITY PURPOSES....................................5-2
5.3 USING FILTERS TO IMPROVE PERFORMANCE.............................5-3
5.4 ADDRESS TABLE FILTERS....................................................................5-4
5.4.1 Destination Address Filter............................................................5-5
5.4.2 Source Address Filter ....................................................................5-5
5.4.3 Combination Address Filters .......................................................5-6
5.4.4 Source Address Multicast Filter...................................................5-6
5.5 COMBINATION PORT FILTERS..........................................................5-7
5.5.1 Configurable Fields .......................................................................5-8
Type ....................................................................................................5-9
Source Range.....................................................................................5-9
Source Range Start............................................................................5-9
Source Range End.............................................................................5-9
Source Range Mask ........................................................................5-10
Destination Range ..........................................................................5-10
Destination Range Start .................................................................5-10
Destination Range End ..................................................................5-10
Destination Range Mask................................................................5-10
Port/Group Match .........................................................................5-10
Port/Group # ..................................................................................5-10
Protocol Match ................................................................................5-11
Protocol Type...................................................................................5-11
Field Match......................................................................................5-11
Field Origin......................................................................................5-12
Field Offset.......................................................................................5-12
Field Value .......................................................................................5-12
Field Mask .......................................................................................5-12
Threshold Time ...............................................................................5-12
Threshold.........................................................................................5-13
Filter Index.......................................................................................5-13
Combination Port Filter Options..................................................5-13
Pseudo Filter Option ......................................................................5-13
Linking Combination Port Filters ................................................5-14
5.6 ADDING A FILTER...............................................................................5-14
5.7 MODIFYING A FILTER........................................................................5-18
5.8 DELETING A FILTER ...........................................................................5-18
5.9 DISPLAYING A FILTER.......................................................................5-19
5.10 FILTERING APPLICATION EXAMPLES........................................5-19