D-Link NetDefend DFL-1660, User Manual

Page: 4 / 595

Table of Contents
Preface ...............................................................................................................15
1. NetDefendOS Overview ....................................................................................17
1.1. Features ................................................................................................17
1.2. NetDefendOS Architecture ......................................................................20
1.2.1. State-based Architecture ...............................................................20
1.2.2. NetDefendOS Building Blocks .......................................................20
1.2.3. Basic Packet Flow ........................................................................21
1.3. NetDefendOS State Engine Packet Flow .....................................................24
2. Management and Maintenance ............................................................................29
2.1. Managing NetDefendOS ..........................................................................29
2.1.1. Overview ...................................................................................29
2.1.2. The Default Administrator Account .................................................30
2.1.3. The Web Interface .......................................................................30
2.1.4. The CLI .....................................................................................36
2.1.5. CLI Scripts .................................................................................45
2.1.6. Secure Copy ...............................................................................49
2.1.7. The Console Boot Menu ...............................................................51
2.1.8. Management Advanced Settings .....................................................53
2.1.9. Working with Configurations .........................................................54
2.2. Events and Logging ................................................................................60
2.2.1. Overview ...................................................................................60
2.2.2. Log Messages .............................................................................60
2.2.3. Creating Log Receivers .................................................................61
2.2.4. Logging to MemoryLogReceiver ....................................................61
2.2.5. Logging to Syslog Hosts ...............................................................61
2.2.6. Severity Filter and Message Exceptions ...........................................63
2.2.7. SNMP Traps ...............................................................................63
2.2.8. Advanced Log Settings .................................................................65
2.3. RADIUS Accounting ..............................................................................66
2.3.1. Overview ...................................................................................66
2.3.2. RADIUS Accounting Messages ......................................................66
2.3.3. Interim Accounting Messages ........................................................68
2.3.4. Configuring RADIUS Accounting ..................................................68
2.3.5. RADIUS Accounting Security ........................................................69
2.3.6. RADIUS Accounting and High Availability ......................................69
2.3.7. Handling Unresponsive RADIUS Servers .........................................70
2.3.8. Accounting and System Shutdowns .................................................70
2.3.9. Limitations with NAT ...................................................................70
2.3.10. Advanced RADIUS Settings ........................................................71
2.4. Monitoring ............................................................................................72
2.4.1. The Link Monitor ........................................................................72
2.4.2. SNMP Monitoring .......................................................................74
2.4.3. Hardware Monitoring ...................................................................77
2.4.4. Memory Monitoring Settings .........................................................79
2.5. The pcapdump Command ........................................................................81
2.6. Maintenance ..........................................................................................84
2.6.1. Auto-Update Mechanism ...............................................................84
2.6.2. Backing Up Configurations ...........................................................84
2.6.3. Restore to Factory Defaults ............................................................86
3. Fundamentals ...................................................................................................89
3.1. The Address Book ..................................................................................89
3.1.1. Overview ...................................................................................89
3.1.2. IP Addresses ...............................................................................89
3.1.3. Ethernet Addresses .......................................................................91
3.1.4. Address Groups ...........................................................................92
3.1.5. Auto-Generated Address Objects ....................................................93
3.1.6. Address Book Folders ...................................................................93
4