Netgear 108 MBPS WIRELESS WGT624 V3 User Manual Page 125
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Reference Manual for the 108 Mbps Wireless Firewall Router WGT624 v3
Wireless Networking Basics D-9
202-10090-02 v 1.4, July 2005
WPA and WPA2 offer the following benefits:
• Enhanced data privacy
• Robust key management
• Data origin authentication
• Data integrity protection
The Wi-Fi Alliance is now performing interoperability certification testing on Wi-Fi Protected
Access products. Starting August of 2003, all new Wi-Fi certified products have to support WPA.
NETGEAR is implementing WPA and WPA2 on client and access point products. The 802.11i
standard was ratified in 2004.
How Does WPA Compare to WEP?
WEP is a data encryption method and is not intended as a user authentication mechanism. WPA
user authentication is implemented using 802.1x and the Extensible Authentication Protocol
(EAP). Support for 802.1x authentication is required in WPA. In the 802.11 standard, 802.1x
authentication was optional. For details on EAP specifically, refer to IETF's RFC 2284.
With 802.11 WEP, all access points and client wireless adapters on a particular wireless LAN must
use the same encryption key. A major problem with the 802.11 standard is that the keys are
cumbersome to change. If you do not update the WEP keys often, an unauthorized person with a
sniffing tool can monitor your network for less than a day and decode the encrypted messages.
Products based on the 802.11 standard alone offer system administrators no effective method to
update the keys.
For 802.11, WEP encryption is optional. For WPA, encryption using Temporal Key Integrity
Protocol (TKIP) is required. TKIP replaces WEP with a new encryption algorithm that is stronger
than the WEP algorithm, but that uses the calculation facilities present on existing wireless devices
to perform encryption operations. TKIP provides important data encryption enhancements
including a per-packet key mixing function, a message integrity check (MIC) named Michael, an
extended initialization vector (IV) with sequencing rules, and a re-keying mechanism. Through
these enhancements, TKIP addresses all of known WEP vulnerabilities.
- Reference Manual for the 1
- 108 Mbps Wireless 1
- Firewall Router 1
- Contents 5
- 202-10090-02 v 1.4, July 2005 10
- Chapter 1 11
- About This Manual 11
- How to Use This Manual 12
- How to Print this Manual 13
- 1-4 About This Manual 14
- Chapter 2 15
- Introduction 15
- 802.11g Wireless Networking 16
- Security 17
- Extensive Protocol Support 17
- 2-4 Introduction 18
- Package Contents 19
- The Router’s Front Panel 20
- The Router’s Rear Panel 21
- 2-8 Introduction 22
- Chapter 3 23
- Initial Configuration 24
- Logging Into Your Router 25
- Figure 3-4: Login result 26
- Changing Your Configuration 28
- Wireless Settings 32
- Chapter 4 35
- Content Filtering 35
- 4-2 Content Filtering 36
- Content Filtering 4-3 37
- 4-4 Content Filtering 38
- Figure 4-4: Schedule menu 38
- Content Filtering 4-5 39
- Figure 4-5: Email menu 39
- 4-6 Content Filtering 40
- Content Filtering 4-7 41
- Figure 4-6: Logs menu 41
- 4-8 Content Filtering 42
- Table 4-2. Log action buttons 42
- Chapter 5 43
- Maintenance 43
- 5-2 Maintenance 44
- 5-4 Maintenance 46
- Upgrading the Router Software 47
- Configuration File Management 49
- Erasing the Configuration 50
- Chapter 6 51
- Advanced Configuration 51
- Using Port Triggering 54
- Port Triggering Rules Menu 55
- 6-6 Advanced Configuration 56
- Configuring WAN Setup Options 57
- Using a Dynamic DNS Service 59
- Using LAN IP Setup Options 61
- 6-12 Advanced Configuration 62
- Using Address Reservation 63
- Advanced Configuration 6-19 69
- Figure 6-10. UPnP Menu 69
- 6-20 Advanced Configuration 70
- Chapter 7 71
- Troubleshooting 71
- LEDs Never Turn Off 72
- Troubleshooting 7-3 73
- 7-6 Troubleshooting 76
- Problems with Date and Time 77
- 7-8 Troubleshooting 78
- Appendix A 79
- Technical Specifications 79
- A-2 Technical Specifications 80
- Electromagnetic Emissions 80
- Interface Specifications 80
- Appendix B 81
- IP Addresses and the Internet 82
- Subnet Addressing 84
- Table 7-2. Netmask Formats 86
- Private IP Addresses 87
- Related Documents 89
- Domain Name Server 89
- IP Configuration by DHCP 90
- Ethernet Cabling 91
- Category 5 Cable Quality 92
- Inside Twisted Pair Cables 92
- Appendix C 95
- Preparing Your Network 95
- C-2 Preparing Your Network 96
- Preparing Your Network C-5 99
- Verifying TCP/IP Properties 100
- C-8 Preparing Your Network 102
- Preparing Your Network C-9 103
- C-10 Preparing Your Network 104
- Preparing Your Network C-11 105
- C-12 Preparing Your Network 106
- Preparing Your Network C-13 107
- Properties button 108
- MacOS 8.6 or 9.x 110
- Are Login Protocols Used? 112
- Computers 114
- Restarting the Network 115
- C-22 Preparing Your Network 116
- Appendix D 117
- Wireless Networking Basics 117
- 802.11 Authentication 119
- Open System Authentication 119
- Shared Key Authentication 120
- Overview of WEP Parameters 121
- Key Size 122
- Wireless Channels 123
- How Does WPA Compare to WEP? 125
- Wired Network with Optional 128
- 802.1x Port Based Network 128
- Access Control 128
- Wireless LAN 128
- Is WPA/WPA2 Perfect? 132
- Product Support for WPA/WPA2 132
- Glossary 135
- ISO Network Model 141
- MAC (Media Access Control) 141
- Mesh Networks 141
- War Driving 146
- Wi-Fi (Wireless Fidelity) 146
- Wi-Fi Protected Access (WPA) 146
- Wireless Multimedia (WMM) 148
- Wireless Networking 148
- WLAN (Wireless LAN) 148
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