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Configuring the RADIUS Server for Authentication

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D-Link Unified Access Point Administrator's Guide information. The certificate is automatically sent to the RADIUS server for authentication and authorization. Configuring the RADIUS Server for Authentication An external RADIUS server running on the network can support of EAP-TLS smart card/ certificate distribution to clients in a Public Key Infrastructure (PKI) as well as EAP-PEAP user account setup and authentication. This section provides an example of configuring an external RADIUS server for the purposes of authenticating and authorizing TLS-EAP certificates from wireless clients of a particular Unified Access Point configured for either "WPA/WPA2 Enterprise (RADIUS)" or "IEEE 802.1X" security modes. The intention of this section is to provide some idea of what this process will look like; procedures will vary depending on the RADIUS server you use and how you configure it. This example uses the Internet Authentication Service that comes with Microsoft Windows 2003 server. NOTE: This appendix does not describe how to set up Administrative users on the RADIUS server. This example assumes you have already configured RADIUS server user accounts. You need a RADIUS server user name and password for both this procedure and the following one that describes how to obtain and install a certificate on the wireless client. Please consult the documentation for your RADIUS server for information about setting up user accounts. The purpose of this procedure is to identify your Unified Access Point as a "client" to the RADIUS server. The RADIUS server can then handle authentication and authorization of wireless clients for the AP. This procedure is required per access point. If you have more than one access point with which you plan to use an external RADIUS server, you need to follow these steps for each of those APs. The information you need to provide to the RADIUS server about the access point corresponds to settings on the access point (Security) and vice versa. You should have already provided the RADIUS server IP Address to the AP; in the steps that follow you will provide the access point IP address to the RADIUS server. The RADIUS Key provided on the AP is the "shared secret" you will provide to the RADIUS server. NOTE: The RADIUS server is identified by its IP address and UDP port numbers for the different services it provides. On the current release of the Unified Access Point software, the RADIUS server User Datagram Protocol (UDP) ports used by the access point are not configurable. (The Unified Access Point is hard-coded to use RADIUS server UDP port 1812 for authentication and port 1813 for accounting.) 116 © 2001-2008 D-Link Corporation. All Rights Reserved.

Section	Page
Unified Access Point (AP) Administrator’s Guide	1
Table of Contents	3
List of Figures	7
List of Tables	9
About This Document	11
Document Organization	11
Audience	11
Document Conventions	11
Online Help, Supported Browsers, and Limitations	12
Overview of the D-Link Access Point	15
Features and Benefits	16
IEEE Standards Support	16
Wireless Features	16
Security Features	17
Networking	17
Maintainability	17
Access Point Hardware	18
Preparing to Install the Access Point	19
Default Settings for the Unified Access Points	19
Administrator’s Computer Requirements	21
Wireless Client Requirements	22
Dynamic and Static IP Addressing on the AP	23
Recovering an IP Address	23
Discovering a Dynamically Assigned IP Address	23
Using the Reset Button	23
Installing the Access Point	25
Installing the Unified Access Point	25
Viewing Basic Settings	29
Using the CLI to View the IP Address	30
Configuring the Ethernet Interface	31
Using the Web UI to configure Ethernet Settings	31
Using the CLI to Configure Ethernet Settings	33
Configuring IEEE 802.1X Authentication	34
Using the Web UI to Configure 802.1X Authentication Information	35
Using the CLI to Configure 802.1X Authentication Information	36
Verifying the Installation	36
Configuring Access Point Security	39
Understanding Security on Wireless Networks	39
Choosing a Security Mode	39
Comparing Security Modes	40
When to Use Unencrypted (No Security)	40
When to Use Static WEP	40
When to Use IEEE 802.1X	41
When to Use WPA Personal	42
When to Use WPA Enterprise	42
Enabling Station Isolation	43
Configuring Virtual Access Point Security	43
None (Plain-text)	45
Static WEP	45
Static WEP Rules	48
Example of Using Static WEP	48
IEEE 802.1X	49
WPA Personal	50
WPA Enterprise	52
Prohibiting the SSID Broadcast	53
Managing the Access Point	55
Setting the Wireless Interface	55
Using the 802.11h Wireless Mode	57
Configuring Radio Settings	58
Configuring Virtual Access Points	62
Controlling Access by MAC Authentication	66
Configuring a MAC Filter List on the AP	66
Configuring MAC Authentication on the RADIUS Server	67
Configuring Load Balancing	68
Configuring Access Point Services	69
Configuring Quality of Service (QoS)	69
Understanding QoS	69
QoS and Load Balancing	69
802.11e and WMM Standards Support	70
QoS Queues and Parameters to Coordinate Traffic Flow	70
QoS Queues and Diff-Serve Code Points (DSCP) on Packets	70
EDCF Control of Data Frames and Arbitration Interframe Spaces	71
Random Backoff and Minimum / Maximum Contention Windows	72
Packet Bursting for Better Performance	73
Transmission Opportunity (TXOP) Interval for Client Stations	73
802.1p and DSCP tags	73
Configuring QoS Settings	75
Enabling the Network Time Protocol Server	79
Enabling or Disabling a Network Time Protocol (NTP) Server	80
Maintaining the Access Point	81
Managing the Configuration File	81
Resetting the Factory Default Configuration	82
Saving the Current Configuration to a Backup File	83
Restoring the Configuration from a Previously Saved File	83
Rebooting the Access Point	85
Upgrading the Firmware	85
Configuring the Access Point for Managed Mode	87
Transitioning Between Modes	87
Configuring Managed Access Point Settings	88
Viewing Managed AP DHCP Information	89
Viewing Access Point Status	91
Viewing Interface Status	91
Ethernet (Wired) Settings	92
Wireless Settings	92
Viewing Events Logs	92
Configuring Persistent Logging Options	93
Configuring the Log Relay Host for Kernel Messages	94
Example of Using Linux syslogd	94
Enabling or Disabling the Log Relay Host on the Events Page	95
Viewing Transmit and Receive Statistics	95
Viewing Client Association Information	97
Link Integrity Monitoring	98
Viewing Neighboring Access Points	98
Wireless Client Settings and RADIUS Server Setup	101
Accessing Wireless Client Security Settings	102
Configuring a Client to Access an Unsecure Network	104
Configuring Static WEP Security on a Client	104
Configuring WPA/WPA2 Personal on a Client	106
Using an External Authentication Server	108
Configuring IEEE 802.1X Security on a Client	108
IEEE 802.1X Client Using EAP/TLS Certificate	108
Configuring WPA/WPA2 Enterprise (RADIUS)	111
WPA/WPA2 Enterprise (RADIUS) Client Using EAP/PEAP	111
WPA/WPA2 Enterprise (RADIUS) Client Using EAP-TLS Certificate	113
Configuring the RADIUS Server for Authentication	116
Obtaining a TLS-EAP Certificate for a Client	119
Configuring the RADIUS Server for VLAN Tags	122
CLI for AP Configuration	125
How to Access the Access Point CLI	125
Telnet Connection to the AP	125
SSH Connection to the AP	126
Commands and Syntax	127
Using the get Command	128
Using the set Command	128
Using the add Command	129
Using the remove Command	129
Additional CLI Commands	130
Getting Help on Commands at the CLI	130
Tab Completion	130
Keyboard Shortcuts	131
Interface Naming Conventions	132
Saving Configuration Changes	133
Access Point CLI Commands	134
Configuring Basic Settings	134
Status	135
Ethernet Settings	136
Wireless Interface	137
Radio Settings	138
Virtual Access Points	139
Set Security to Static WEP	140
Set Security to IEEE 802.1X	142
Set Security to WPA/WPA2 Personal (PSK)	143
Set Security to WPA/WPA2 Enterprise (RADIUS)	144
Managed Access Point	146
IEEE 802.1X Supplicant Authentication	147
Quality of Service	147
Time	149
System Management	150
CLI Classes and Properties Reference	150

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116

D-Link Unified Access Point Administrator’s Guide

information. The certificate is automatically sent to the RADIUS server for authentication and

authorization.

Configuring the RADIUS Server for Authentication

An external RADIUS server running on the network can support of EAP-TLS smart card/

certificate distribution to clients in a Public Key Infrastructure (PKI) as well as EAP-PEAP

user account setup and authentication.

This section provides an example of configuring an external RADIUS server for the purposes

of authenticating and authorizing TLS-EAP certificates from wireless clients of a particular

Unified Access Point configured for either “WPA/WPA2 Enterprise (RADIUS)” or “IEEE

802.1X” security modes. The intention of this section is to provide some idea of what this

process will look like; procedures will vary depending on the RADIUS server you use and

how you configure it. This example uses the Internet Authentication Service that comes with

Microsoft Windows 2003 server.

NOTE:

This appendix does not describe how to set up Administrative users on the

RADIUS server. This example assumes you have already configured

RADIUS server user accounts. You need a RADIUS server user name and

password for both this procedure and the following one that describes how to

obtain and install a certificate on the wireless client. Please consult the

documentation for your RADIUS server for information about setting up user

accounts.

The purpose of this procedure is to identify your Unified Access Point as a “client” to the

RADIUS server. The RADIUS server can then handle authentication and authorization of

wireless clients for the AP. This procedure is required

per access point

. If you have more than

one access point with which you plan to use an external RADIUS server, you need to follow

these steps for each of those APs.

The information you need to provide to the RADIUS server about the access point

corresponds to settings on the access point (Security) and vice versa. You should have already

provided the RADIUS server IP Address to the AP; in the steps that follow you will provide

the access point IP address to the RADIUS server. The RADIUS Key provided on the AP is

the “shared secret” you will provide to the RADIUS server.

NOTE:

The RADIUS server is identified by its IP address and UDP port numbers for

the different services it provides. On the current release of the Unified

Access Point software, the RADIUS server User Datagram Protocol (UDP)

ports used by the access point are not configurable. (The Unified Access

Point is hard-coded to use RADIUS server UDP port 1812 for authentication

and port 1813 for accounting.)