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Contents v
G
Statistics & Logs ......................................................... 7-51
General Statistics .............................................. 7-51
Event histories ............................................................ 7-52
System Information...................................................... 7-55
SNMP ......................................................................... 7-55
The SNMP Setup screen..................................... 7-56
SNMP traps ....................................................... 7-57
Chapter 8 — Security .............................................................8-59
Suggested security measures....................................... 8-59
User accounts ............................................................. 8-59
Telnet access .............................................................. 8-61
About filters and filter sets ........................................... 8-62
What’s a filter and what’s a filter set?.................. 8-62
How filter sets work............................................ 8-62
How individual filters work................................... 8-64
Design guidelines............................................... 8-68
Filtering tutorial ........................................................... 8-69
General filtering terms........................................ 8-69
Basic IP packet components............................... 8-69
Basic protocol types........................................... 8-70
Filter basics....................................................... 8-72
Example IP filters ............................................... 8-73
Working with Filters and filter sets................................. 8-75
Adding a filter set............................................... 8-76
Adding filters to a filter set.................................. 8-78
Viewing filter sets............................................... 8-82
Modifying filter sets............................................ 8-83
Deleting a filter set............................................. 8-83
Generic filters.............................................................. 8-84
About generic filters ........................................... 8-85