ZyAIR G-3000 User’s Guide
Appendix L Types of EAP Authentication
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Appendix L
Types of EAP Authentication
This appendix discusses the five popular EAP authentication types:
EAP-MD5
,
EAP-TLS
,
EAP-TTLS
,
PEAP
and
LEAP
.
The type of authentication you use depends on the RADIUS server or the AP. Consult your
network administrator for more information.
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.
EAP-TLS (Transport Layer Security)
With EAP-TLS, digital certifications are needed by both the server and the wireless stations
for mutual authentication. The server presents a certificate to the client. After validating the
identity of the server, the client sends a different certificate to the server. The exchange of
certificates is done in the open before a secured tunnel is created. This makes user identity
vulnerable to passive attacks. A digital certificate is an electronic ID card that authenticates the
sender’s identity. However, to implement EAP-TLS, you need a Certificate Authority (CA) to
handle certificates, which imposes a management overhead.
EAP-TTLS (Tunneled Transport Layer Service)
EAP-TTLS is an extension of the EAP-TLS authentication that uses certificates for only the
server-side authentications to establish a secure connection. Client authentication is then done
by sending username and password through the secure connection, thus client identity is
protected. For client authentication, EAP-TTLS supports EAP methods and legacy
authentication methods such as PAP, CHAP, MS-CHAP and MS-CHAP v2.
Summary of Contents for ZyAIR G-3000
Page 14: ...ZyAIR G 3000 User s Guide 15 Table of Contents...
Page 22: ...ZyAIR G 3000 User s Guide 23 List of Tables...
Page 26: ...ZyAIR G 3000 User s Guide 27 Preface...
Page 40: ...ZyAIR G 3000 User s Guide 41 Chapter 2 Introducing the Web Configurator...
Page 48: ...ZyAIR G 3000 User s Guide 49 Chapter 3 Wizard Setup...
Page 54: ...ZyAIR G 3000 User s Guide 55 Chapter 4 System Screens...
Page 100: ...ZyAIR G 3000 User s Guide 101 Chapter 8 IP Screen...
Page 116: ...ZyAIR G 3000 User s Guide 117 Chapter 10 Maintenance Figure 59 Restart Screen...
Page 122: ...ZyAIR G 3000 User s Guide 123 Chapter 11 Introducing the SMT...
Page 132: ...ZyAIR G 3000 User s Guide 133 Chapter 13 LAN Setup...
Page 174: ...ZyAIR G 3000 User s Guide 175 Appendix C Power over Ethernet Specifications...
Page 176: ...ZyAIR G 3000 User s Guide 177 Appendix D Brute Force Password Guessing Protection...
Page 188: ...ZyAIR G 3000 User s Guide 189 Appendix E Setting up Your Computer s IP Address...
Page 192: ...ZyAIR G 3000 User s Guide 193 Appendix F IP Address Assignment Conflicts...
Page 200: ...ZyAIR G 3000 User s Guide 201 Appendix G IP Subnetting...
Page 202: ...ZyAIR G 3000 User s Guide 203 Appendix H Command Interpreter...
Page 206: ...ZyAIR G 3000 User s Guide 207 Appendix I Log Descriptions...
Page 210: ...ZyAIR G 3000 User s Guide 211 Appendix J Wireless LAN and IEEE 802 11...
