User's Manual

Contents vii
Troubleshooting the Web Configuration Interface ..........................................................6-3
Troubleshooting the ISP Connection ..............................................................................6-4
Troubleshooting a TCP/IP Network Using a Ping Utility .................................................6-4
Testing the LAN Path to Your Gateway ....................................................................6-4
Testing the Path from Your PC to a Remote Device ................................................6-5
Appendix A
Technical Specifications .................................................................................................... A-1
Appendix B
Networks, Routing, and Firewall Basics........................................................................... B-1
Related Publications ...................................................................................................... B-1
Basic Router Concepts .................................................................................................. B-1
What is a Router? ................................................................................................... B-2
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
Related Documents ................................................................................................. B-9
Domain Name Server ............................................................................................ B-10
IP Configuration by DHCP .................................................................................... B-10
Internet Security and Firewalls .................................................................................... B-10
What is a Firewall? .................................................................................................B-11
Stateful Packet Inspection ......................................................................................B-11
Denial of Service Attack .........................................................................................B-11
Wireless Networking Overview .................................................................................... B-12
Infrastructure Mode ............................................................................................... B-12
Ad Hoc Mode (Peer-to-Peer Workgroup) .............................................................. B-12
Network Name: Extended Service Set Identification (ESSID) .............................. B-13
Authentication and WEP .............................................................................................. B-13
802.11b Authentication .......................................................................................... B-13
Open System Authentication ................................................................................. B-14
Shared Key Authentication .................................................................................... B-15
Overview of WEP Parameters .............................................................................. B-16