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Reference Manual for the ME103 802.11b ProSafe Wireless Access Point
Wireless Networking Basics B-5
August 2003
Figure 6-2: 802.11 shared key authentication
Overview of WEP Parameters
Wired Equivalent Privacy (WEP) data encryption is used when the wireless devices are configured
to operate in Shared Key authentication mode. There are two shared key methods implemented in
most commercially available products, 64-bit and 128-bit WEP data encryption.
Before enabling WEP on an 802.11 network, you must first consider what type of encryption you
require and the key size you want to use. Typically, there are three WEP Encryption options
available for 802.11 products:
1. Do Not Use WEP: The 802.11 network does not encrypt data. For authentication purposes, the
network uses Open System Authentication.
2. Use WEP for Encryption: A transmitting 802.11 device encrypts the data portion of every
packet it sends using a configured WEP Key. The receiving 802.11b device decrypts the data using
the same WEP Key. For authentication purposes, the 802.11b network uses Open System
Authentication.
3. Use WEP for Authentication and Encryption: A transmitting 802.11 device encrypts the data
portion of every packet it sends using a configured WEP Key. The receiving 802.11 device
decrypts the data using the same WEP Key. For authentication purposes, the 802.11 network uses
Shared Key Authentication.
INTERNET LO CA L
ACT
12345678
LNK
LNK/ACT
100
Cable/DSL
ProSafeWirelessVPN SecurityFirewall
MODEL
FVM318
PWR TEST
WLAN
Enable
Access Point1) Authentication
request sent to AP
2) AP sends challenge text
3) Client encrypts
challenge text and
sends it back to AP
4) AP decrypts, and if correct,
authenticates client
5) Client connects to network
802.11b Authentication
Shared Key Steps
Cable or
DLS modem
Client
attempting
to connect
- Reference Manual for the 1
- ME103 802.11b ProSafe 1
- Wireless Access Point 1
- Technical Support 2
- Radio Frequency Notice 3
- CE Declaration of Conformity 5
- Contents 7
- About This Manual 11
- Chapter 1 11
- Typographical Conventions 12
- Special Message Formats 12
- About This Manual 1-vii 13
- How to Print this Manual 14
- Chapter 2 15
- Introduction 15
- Key Features 16
- Introduction 2-3 17
- System Requirements 18
- What’s In the Box? 19
- Hardware Description 19
- 2-6 Introduction 20
- Figure 2-1: ME103 front panel 20
- Introduction 2-7 21
- Figure 2-2: ME103 rear panel 21
- Chapter 3 22
- Cabling Requirements 23
- Default Factory Settings 24
- Wireless Data 25
- Security Options 25
- Range: Up to 500 Feet 25
- ETHERNET 26
- 5-12V DC 26
- EPLOY THE ME103 ACCESS POINT 27
- 4VERIFY WIRELESS CONNECTIVITY 28
- How to Configure WEP 38
- Chapter 4 41
- Maintenance 41
- 4-2 Maintenance 42
- Statistics 43
- 4-4 Maintenance 44
- Table 4-1. Statistics Fields 44
- Activity Log 45
- 4-6 Maintenance 46
- Configuration File Management 48
- 4-10 Maintenance 50
- Chapter 5 51
- Advanced Configuration 51
- Advanced Configuration 5-7 57
- 5-8 Advanced Configuration 58
- Advanced Configuration 5-9 59
- 192.168.0.1 60
- Hub or Switch 60
- 5-12 Advanced Configuration 62
- Antenna Installation 63
- Blank Configuration Worksheet 64
- Chapter 6 65
- Troubleshooting 65
- The LAN light is not lit 66
- Troubleshooting 6-3 67
- Appendix A 69
- Specifications 69
- A-2 Specifications 70
- Appendix B 71
- Wireless Networking Basics 71
- Authentication, WEP, and WPA 72
- 802.11 Authentication 73
- Open System Authentication 73
- Shared Key Authentication 74
- Overview of WEP Parameters 75
- Key Size 76
- Wireless Channels 77
- Appendix C 83
- IP Addresses and the Internet 84
- Subnet Addressing 86
- Network Subnet Node 87
- Table 6-2. Netmask Formats 88
- Private IP Addresses 89
- IP Configuration by DHCP 90
- Domain Name Server 91
- Routing Protocols 91
- What is a Firewall? 93
- Stateful Packet Inspection 93
- Denial of Service Attack 93
- Ethernet Cabling 94
- Cable Quality 95
- Appendix D 97
- August 2003 100
- Verifying TCP/IP Properties 101
- 3. Type ipconfig /all 107
- 4. Type exit 107
- Glossary 109
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