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ZyXEL NWD-370N User’s Guide
Appendix C 71
APPENDIX C
Wireless Security
Types of EAP Authentication
This section discusses some popular authentication types: EAP-MD5, EAP-TLS, EAP-TTLS,
PEAP and LEAP. Your wireless LAN device may not support all authentication types.
EAP (Extensible Authentication Protocol) is an authentication protocol that runs on top of the
IEEE 802.1x transport mechanism in order to support multiple types of user authentication. By
using EAP to interact with an EAP-compatible RADIUS server, an access point helps a
wireless station and a RADIUS server perform authentication.
The type of authentication you use depends on the RADIUS server and an intermediary AP(s)
that supports IEEE 802.1x.
For EAP-TLS authentication type, you must first have a wired connection to the network and
obtain the certificate(s) from a certificate authority (CA). A certificate (also called digital IDs)
can be used to authenticate users and a CA issues certificates and guarantees the identity of
each certificate owner.
EAP-MD5 (Message-Digest Algorithm 5)
MD5 authentication is the simplest one-way authentication method. The authentication server
sends a challenge to the wireless station. The wireless station ‘proves’ that it knows the
password by encrypting the password with the challenge and sends back the information.
Password is not sent in plain text.
However, MD5 authentication has some weaknesses. Since the authentication server needs to
get the plaintext passwords, the passwords must be stored. Thus someone other than the
authentication server may access the password file. In addition, it is possible to impersonate an
authentication server as MD5 authentication method does not perform mutual authentication.
Finally, MD5 authentication method does not support data encryption with dynamic session
key. You must configure WEP encryption keys for data encryption.
- NWD-370N 1
- Copyright 3
- Certifications 4
- Notices 5
- Viewing Certifications 5
- Safety Warnings 6
- ZyXEL Limited Warranty 7
- Customer Support 8
- Customer Support 9 9
- ZyXEL NWD-370N User’s Guide 10
- 10 Customer Support 10
- Table of Contents 11
- List of Figures 13
- List of Tables 15
- 16 List of Tables 16
- User Guide Feedback 17
- Syntax Conventions 17
- About This User's Guide 17
- Related Documentation 17
- Graphics Icons Key 18
- CHAPTER 1 19
- 1.2 Application Overview 20
- 1.2.0.2 Ad-Hoc 21
- 1.4 Configuration Methods 22
- Chapter 1 Getting Started 23 23
- Figure 5 Enable WZC 23
- 24 Chapter 1 Getting Started 24
- CHAPTER 2 25
- 26 Chapter 2 Tutorial 26
- Chapter 2 Tutorial 27 27
- 28 Chapter 2 Tutorial 28
- Chapter 2 Tutorial 29 29
- 30 Chapter 2 Tutorial 30
- CHAPTER 3 31
- 3.2 Wireless LAN Security 32
- 3.2.1.2 IEEE 802.1x 33
- 3.2.1.3 WPA and WPA2 33
- CHAPTER 4 35
- Figure 19 Link Info 36
- Table 5 Link Info 36
- 4.3 The Site Survey Screen 37
- Figure 21 Site Survey 38
- Table 7 Site Survey 38
- 4.3.1 Security Settings 39
- 4.3.1.2 WPA-PSK/WPA2-PSK 40
- 4.3.1.3 WPA/WPA2 41
- 4.3.1.4 IEEE 802.1x 42
- 4.3.2 Confirm Save Screen 43
- 4.4 The Profile Screen 44
- Figure 27 Profile 45
- Table 13 Profile 45
- 4.4.1 Adding a New Profile 46
- 4.5 The Adapter Screen 50
- CHAPTER 5 53
- 54 Chapter 5 Maintenance 54
- CHAPTER 6 55
- 56 Chapter 6 Troubleshooting 56
- APPENDIX A 57
- 58 Appendix A 58
- APPENDIX B 59
- 60 Appendix B 60
- Appendix B 61 61
- 62 Appendix B 62
- Security Settings 63
- 64 Appendix B 64
- Authentication 65
- Authentication Properties 66
- 68 Appendix B 68
- Appendix B 69 69
- 70 Appendix B 70
- APPENDIX C 71
- Dynamic WEP Key Exchange 72
- WPA and WPA2 73
- User Authentication 74
- Appendix C 75 75
- Security Parameters Summary 76
- APPENDIX D 77
- Installing Components 78
- Configuring 79
- Windows 2000/XP 80
- Dial-up Connections 81
- 82 Appendix D 82
- Appendix D 83 83
- Verifying Settings 84
- Index 85 85
- 86 Index 86
- Index 87 87
- 88 Index 88
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