Contents
ix
Remote Management
.....................................................................................................
9-9
Chapter 10
Troubleshooting
Basic Functioning
.........................................................................................................
10-1
Power LED Not On
.................................................................................................
10-2
Test LED Never Turns On or Test LED Stays On
...................................................
10-2
Local or Internet Port Link LEDs Not On
................................................................
10-2
Troubleshooting the Web Configuration Interface
........................................................
10-4
Troubleshooting the ISP Connection
............................................................................
10-5
Troubleshooting a TCP/IP Network Using a Ping Utility
...............................................
10-6
Testing the LAN Path to Your Firewall
....................................................................
10-6
Testing the Path from Your PC to a Remote Device
..............................................
10-7
Restoring the Default Configuration and Password
......................................................
10-8
Using the Default Reset button
..............................................................................
10-8
Problems with Date and Time
.......................................................................................
10-8
Appendix A
Technical Specifications
Appendix B
Networks, Routing, and Firewall Basics
Basic Router Concepts
..................................................................................................
B-1
What is a Router?
...................................................................................................
B-1
Routing Information Protocol
...................................................................................
B-2
IP Addresses and the Internet
.................................................................................
B-2
Netmask
..................................................................................................................
B-4
Subnet Addressing
..................................................................................................
B-5
Private IP Addresses
...............................................................................................
B-7
Single IP Address Operation Using NAT
.................................................................
B-8
MAC Addresses and Address Resolution Protocol
.................................................
B-9
Domain Name Server
..............................................................................................
B-9
IP Configuration by DHCP
....................................................................................
B-10
Internet Security and Firewalls
....................................................................................
B-10
What is a Firewall?
................................................................................................
B-10
Stateful Packet Inspection
......................................................................................
B-11
Denial of Service Attack
.........................................................................................
B-11
Wireless Networking
....................................................................................................
B-12