Netopia D3232 IDSL Manuale Utente Scaricare il pdf (Pagina 5)

Contents v

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

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Netopia D3232 IDSL Manuale Utente Pagina 5