ZyXEL Communications ZyXEL ZyAIR AG-225H User Manual
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ZyXEL Communications ZyXEL ZyAIR AG-225H User Manual

ZyXEL Communications ZyXEL ZyAIR AG-225H User Manual

802.11a/b/g wi-fi finder & usb adapter
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ZyXEL AG-225H User's Guide
ZyXEL AG-225H
802.11a/b/ g Wi-Fi Finder & USB Adapter
User's Guide
Version 2.1
September 2005

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Summary of Contents for ZyXEL Communications ZyXEL ZyAIR AG-225H

  • Page 1 ZyXEL AG-225H User’s Guide ZyXEL AG-225H 802.11a/b/ g Wi-Fi Finder & USB Adapter User's Guide Version 2.1 September 2005...

  • Page 2: Copyright

    ZyXEL Communications Corporation. Published by ZyXEL Communications Corporation. All rights reserved. Disclaimer ZyXEL does not assume any liability arising out of the application or use of any products, or software described herein.

  • Page 3: Zyxel Limited Warranty

    ZyXEL Limited Warranty ZyXEL warrants to the original end user (purchaser) that this product is free from any defects in materials or workmanship for a period of up to one (2) years from the date of purchase. During the warranty period and upon proof of purchase, should the product have indications of failure due to faulty workmanship and/or materials, ZyXEL will, at its discretion, repair or replace the defective products or components without charge for either parts or labor and to whatever extent it shall deem necessary to restore the product...

  • Page 4: Federal Communications Commission (Fcc) Interference Statement

    ZyXEL AG-225H User’s Guide Federal Communications Commission (FCC) This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.

  • Page 5: Warranty Information

    Science Park Hsinchu 300 Taiwan ZyXEL Communications Inc. 1130 N. Miller St. Anaheim CA 92806-2001 U.S.A. ZyXEL Communications Czech s.r.o. Modranská 621 143 01 Praha 4 – Modrany Ceská Republika ZyXEL Communications A/S Columbusvej 5 2860 Soeborg Denmark ZyXEL Communications Oy...

  • Page 6: Fcc Statement

    Nils Hansens vei 13 0667 Oslo Norway ZyXEL Communications Alejandro Villegas 33 1º, 28043 Madrid Spain ZyXEL Communications A/S Sjöporten 4, 41764 Göteborg Sweden ZyXEL Communications UK Ltd., 11, The Courtyard, Eastern Road, Bracknell, Berkshire, RG12 2XB, United Kingdom (UK) FCC Statement...

  • Page 7: Table Of Contents

    ZyXEL AG-225H User’s Guide Table of Contents Copyright...ii ZyXEL Limited Warranty ...iii Federal Communications Commission (FCC) Interference Statement...iv Customer Support... v Preface... x Chapter 1 Getting Started...1-1 About Your ZyXEL AG-225H...1-1 ZyXEL AG-225H Wi-Fi Finder User Interface...1-1 LCM Description...1-2 Basic Operation ...1-2 ZyXEL AG-225H Adapter Hardware and Utility Installation...1-2 Using the ZyXEL Utility to Configure Your Network...1-2 1.6.1...
  • Page 8 ZyXEL AG-225H User’s Guide 2.2.1 Data Encryption with WEP... 2-5 2.2.2 IEEE 802.1x... 2-5 2.2.3 WPA/WPA2... 2-6 2.2.4 WPA-PSK/WPA2-PSK Application Example ... 2-7 2.2.5 WPA/WPA2 with RADIUS Application Example... 2-7 Fragmentation Threshold ... 2-8 RTS/CTS Threshold... 2-8 Authentication Type ... 2-9 Chapter 3 Access Point Mode Configuration ...
  • Page 9 Problem Connecting to an Access Point ...6-2 Table Of Contents...

  • Page 10: Preface

    User Guide Feedback Help us help you. E-mail all User’s Guide-related comments, questions or suggestions for improvement to techwriters@zyxel.com.tw or send regular mail to The Technical Writing Team, ZyXEL Communications Corp., 6 Innovation Road II, Science Part, Hsin-Chu, Taiwan. Thank you.
  • Page 11 Graphics Icons Key Notebook computer Computer Wireless Access Point Modem Wireless Signal Server Switch Router Telephone Preface...

  • Page 13: Chapter 1 Getting Started

    This chapter introduces the ZyXEL AG-225H and prepares you to use the ZyXEL Utility. About Your ZyXEL AG-225H The ZyXEL AG-225H is an IEEE 802.11a, 802.11b, and 802.11g compliant wireless LAN adapter. With the ZyXEL AG-225H, you can enjoy wireless mobility within almost any wireless networking environment. The following lists the main features of your ZyXEL AG-225H.

  • Page 14: Lcm Description

    ZyXEL AG-225H User’s Guide LCM Description Detect Mode Display up to 15 detected networks in the order of the signal strength Display the detected networks without any security setting (free hot spot). Display the dedicated network you choose to use Entry Display the current entry of the detected...
  • Page 15 After completing the installation procedure, a Z icon as shown below will automatically appear in the lower right tray bar. Double-clicking on the icon will display the following ZyXEL utility window. Each of the pages (Network, Profile, Site Survey, Options, Version) presented in the ZyXEL Utility are explained in the following sections.

  • Page 16: Network

    ZyXEL AG-225H User’s Guide 1.6.1 Network This page shows how the network is presently configured: network mode, information on the connected AP, TCP/IP, etc. This information cannot be modified in the Network screen. The “Link Information” (lower) window shows the signal quality, signal strength, channel, etc. between the client and AP.

  • Page 17: Profile

    1.6.2 Profile This page is used to manage connections with Access Points. You can create different configuration profiles for connections with different APs and SSIDs. The advantage of saving different profiles is the easiness of quickly changing connections without having to configure the PC with every single variable each time a connection change is made.
  • Page 18 ZyXEL AG-225H User’s Guide 1) Click on [Add] and the following screen will appear. 2) On this screen you will insert some basic settings for your wireless network. [Profile Name] Enter in a descriptive name for this profile. b. [Network Mode] If connecting to an access point or wireless router, choose “Infrastructure”...
  • Page 19 then click on [Add to Profile]. If the access point you choose has encryption enabled, a window will pop up reminding you to enter the encryption information on the next page. If your access point is not listed, close the [Site Survey] window, and type the name of the SSID into the [SSID] field.
  • Page 20 ZyXEL AG-225H User’s Guide Remove To remove a profile from the “Profile List” select it and then click on [Remove]. Apply If you want to change the current profile with another profile from the “Profile List”, select the desired profile and click on [Apply]. The new profile will immediately become the current profile and you will be connected with its SSID.
  • Page 21 Basic Settings: In this page, you can verify the name of the current profile. [Profile Name] Allows you to change the name of the current profile. [Network Mode] Allows you to change between Infrastructure and Ad-Hoc networking modes. [SSID] Allows you to change the SSID that this profile will associate with. Use the [Browse] button to perform a site survey and select the SSID from a list of available SSIDs.
  • Page 22 ZyXEL AG-225H User’s Guide Advanced Settings: This screen allows you to make changes to the default ways the adapter operates including advanced 802.11 settings. Unless you are an advanced user and have deep knowledge about each property on this page, it is recommended that you leave them at the default settings. 1-10 Getting Started...
  • Page 23 WLAN Security: This screen allows you to configure the security settings of your wireless LAN. Security Mode 1) Disabled All data sent between the AP and the client is left unencrypted and may be viewed by other wireless devices. 2) WEP Wired Equivalent Privacy –...
  • Page 24 ZyXEL AG-225H User’s Guide We recommend you use WPA-PSK or WPA2-PSK whenever possible. TCP/IP: This allows you to change your TCP/IP settings. [Use IP Changer] By putting a checkmark in the box, you will overwrite your existing WLAN TCP/IP configuration and use the IP Changer software built-into the ZyXEL Utility. This allows you to configure TCP/IP settings for each profile.

  • Page 25: Site Survey

    1.6.3 Site Survey This page shows a list of SSIDs in your vicinity. Information regarding each SSID is also shown: SSID, mode, signal strength, channel, BSSID (MAC address), data rate, and WEP, WPA, WPA-PSK, etc status. Refresh [Refresh] will scan the vicinity for a certain amount of time and display the scan results. Getting Started 1-13...
  • Page 26 ZyXEL AG-225H User’s Guide Selecting a network from the [Available Networks] list will enable the [Detail Info], [Connect] and [Add to profile] buttons. Detail Info [Detail info] will display the following screen showing the selected device's configuration information. An alternative to clicking on [Detail info] is double-clicking on the SSID of choice. 1-14 Getting Started...
  • Page 27 Connect [Connect] will immediately connect you with the selected network. Add to profile [Add to profile] will have the same effect as clicking on [Add] in the [Profile] page Getting Started 1-15...

  • Page 28: Options

    ZyXEL AG-225H User’s Guide 1.6.4 Options In this page you can configure the behavior of the ZyXEL utility. Let Windows manage this wireless adapter – Windows Zero configuration Allows you to use Windows to configure your wireless network settings. Check this box to configure.

  • Page 29: Version

    1.6.5 Version Software and Hardware information of the current client device. ZyAIR Modes You can set your ZyAIR to operate in either wireless station or access point (AP) modes. In wireless station mode, your ZyAIR must connect to a peer wireless station or an AP to take part in your wireless network.

  • Page 30: Change Zyair Modes

    ZyXEL AG-225H User’s Guide 1.7.1 Change ZyAIR Modes You may change between the modes; select either the Station Mode or AP Mode option in the ZyXEL Utility screen. 1-18 Getting Started...

  • Page 31: Chapter 2 Wireless Lan Networking

    Chapter 2 Wireless LAN Networking This chapter provides background information on general wireless LAN networking technology and terminology. Overview This section describes the wireless LAN network terms and applications. 2.1.1 SSID The SSID (Service Set Identity) is a unique name shared among all wireless devices in a wireless network. Wireless devices must have the same SSID to communicate with each other.
  • Page 32 ZyXEL AG-225H User’s Guide Ad-Hoc (IBSS) Ad-hoc mode does not require an AP or a wired network. Two or more wireless stations communicate directly to each other. An ad-hoc network may sometimes be referred to as an Independent Basic Service Set (IBSS).

  • Page 33: Roaming

    Figure 2-3 Infrastructure Network Example Access Point Mode The following figure depicts a network example in which you set the ZyAIR in access point mode. Figure 2-4 ZyAIR as an Access Point Example In the example, the ZyAIR is installed on computer A and set to operate in access point mode. Computer A shares Internet connection to the wireless LAN, so wireless stations B and C can access the Internet.

  • Page 34: Wireless Lan Security

    ZyXEL AG-225H User’s Guide The following figure depicts a roaming example. When wireless station B moves to position X, the ZyXEL AG-225H in wireless station B automatically switches the channel to the one used by access point 2 in order to stay connected to the network. Figure 2-5 Roaming Example Wireless LAN Security Wireless LAN security is vital to your network to protect wireless communication between wireless...

  • Page 35: Data Encryption With Wep

    Figure 2-6 Wireless LAN Security Levels Configure the wireless LAN security using the Profile Security Settings screen. If you do not enable any wireless security on your ZyXEL AG-225H, the ZyXEL AG-225H’s wireless communications are accessible to any wireless networking device that is in the coverage area. 2.2.1 Data Encryption with WEP WEP (Wired Equivalent Privacy) encryption scrambles all data packets transmitted between the ZyXEL AG-225H and the AP or other wireless stations to keep network communications private.

  • Page 36: Wpa/Wpa2

    ZyXEL AG-225H User’s Guide 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 IEEE802.1x. The ZyXEL AG-225H supports EAP-TLS, EAP-TTLS and EAP-PEAP. 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).

  • Page 37: Wpa-Psk/Wpa2-Psk Application Example

    password approach makes WPA-PSK susceptible to brute-force password-guessing attacks but it’s still an improvement over WEP as it employs an easier-to-use, consistent, single, alphanumeric password. 2.2.4 WPA-PSK/WPA2-PSK Application Example A WPA-PSK application looks as follows. Step 1. First enter identical passwords into the AP and all wireless clients. The Pre-Shared Key (PSK) must consist of between 8 and 63 ASCII characters (including spaces and symbols).

  • Page 38: Fragmentation Threshold

    ZyXEL AG-225H User’s Guide data encryption keys to encrypt every data packet that is wirelessly communicated between the AP and the wireless clients. Figure 2-8 WPA/WPA2 with RADIUS Application Example Fragmentation Threshold The Fragmentation Threshold is the maximum data fragment size (between 256 and 2432 bytes) that can be sent in the wireless network before the ZyXEL AG-225H will fragment the packet into smaller data frames.

  • Page 39: Authentication Type

    they do not know if the channel is currently being used. Therefore, they are considered hidden from each other. Figure 2-9 RTS Threshold When station A sends data to the AP, it might not know that the station B is already using the channel. If these two stations send data at the same time, collisions may occur when both sets of data arrive at the AP at the same time, resulting in a loss of messages for both stations.
  • Page 40 ZyXEL AG-225H User’s Guide Open authentication mode is implemented for ease-of-use and when security is not an issue. The wireless station and the AP do not share a secret key. Thus the wireless stations can associate with any AP and listen to any data transmitted plaintext.

  • Page 41: Chapter 3 Access Point Mode Configuration

    Access Point Mode Configuration This chapter shows you how to configure your ZyAIR in access point mode. Introduction In access point mode, your ZyAIR functions as an access point. This allows you to set up your wireless networks without using a dedicated AP device. Up to 15 wireless stations can associate to the ZyAIR. 3.1.1 Additional Setup Requirements To bridge your wired and wireless network using the ZyAIR, the following requirements must be met: 1.
  • Page 42 ZyXEL AG-225H User’s Guide LABEL Status SSID This field displays the name that identifies your ZyAIR in the wireless LAN network. Channel This field displays the radio channel the ZyAIR is currently using. Security This field displays the authentication type of the ZyAIR. Authentication Select an authentication method.

  • Page 43: How To Configure In Access Point Mode

    LABEL RX Frame This field shows the number of frame when receiving MAC Address This field displays the MAC addresses of up to 15 wireless stations that are currently connected to the ZyAIR. How to configure in Access Point Mode 3.3.1 Profile This page is used to manage connections in the Access Point Mode.
  • Page 44 ZyXEL AG-225H User’s Guide Explanation of each button in this page is shown below. Clicking on this button enables you to create a new profile. The following steps show how this can be done. 1) Click on [Add] and the following screen will appear. 2) On this screen you will insert some basic settings for your wireless network.
  • Page 45 d. [Wireless Mode]: Set the operating frequency depending on your geographical region. [Channel]: Set the operating channel depending on your geographical region. Click [Next]. The following screen will appear. This screen will vary in appearance depending on whether any encryption was detected with your access point.
  • Page 46 ZyXEL AG-225H User’s Guide b. See 3.3.2 MAC Filter Screen Click [Next]. The following screen will appear. WLAN Networking...
  • Page 47 4) Final Step Uncheck the box [Apply this profile now] if you do not want to activate this profile at this time. b. Click [Save] to complete the wizard and save the profile you have just created. Remove To remove a profile from the “Profile List” select it and then click on [Remove]. Apply If you want to change the current profile with another profile from the “Profile List”, select the desired profile and click on [Apply].

  • Page 48: The Mac Filter

    ZyXEL AG-225H User’s Guide 3.3.2 The MAC Filter The MAC Filter screen allows you to configure the ZyAIR to give exclusive access to (Accept) devices or exclude devices from (Reject) connecting to the ZyAIR. Every Ethernet device has a unique MAC (Media Access Control) address.
  • Page 49 Filter MAC Address 1-15 Specify the MAC address(es) of the wireless station(s) that is allowed or denied association to the ZyAIR. Enter six pairs of hexadecimal digits (separated by colons) in the range of “A-F”, “a-f” and “0-9” (for example, 00:A0:C5:00:00:02). If you enter an invalid MAC address, once you click Save to save the values, a warning screen will be displayed.

  • Page 50: Version

    ZyXEL AG-225H User’s Guide 3.3.3 Version Software, Hardware and Status information of the current Access Point Mode. 3-10 WLAN Networking...

  • Page 51: Chapter 4 Maintenance

    Chapter 4 Maintenance This chapter describes how to uninstall or upgrade the ZyXEL Utility. The Version Screen The Version screen displays related version numbers of the ZyXEL AG-225H. The following table describes the read-only fields in this screen. Maintenance...

  • Page 52: Uninstalling The Zyxel Utility

    ZyXEL AG-225H User’s Guide LABEL Package Version This field displays the version number of the combination driver/utility package. Driver Version This field displays the version number of the ZyXEL driver. Utility Version This field displays the version number of the ZyXEL utility. Uninstalling the ZyXEL Utility Follow the steps below to remove (or uninstall) the ZyXEL Utility from your computer.

  • Page 53: Upgrading The Zyxel Utility

    Upgrading the ZyXEL Utility Before you uninstall the ZyXEL Utility, take note of the current network To perform the upgrade, follow the steps below. Step 1. Download the latest version of the utility from the ZyXEL web site and save the file on your computer.

  • Page 55: Chapter 5 Configuring Wireless Security

    Chapter 5 Configuring Wireless Security This chapter covers the configuration of security options in the ZyXEL Utility. Configuring Security You can configure your security settings at any time. Simply select the profile you wish to edit under the [Profile] tab, select [Properties] and then choose [WLAN Security]. You are also presented with the option to configure security during the profile creation process.
  • Page 56 ZyXEL AG-225H User’s Guide 2. Put a check mark next to [Using Static WEP] 3. Click [Config]. You will then see the screen below. 4. [WEP Method] Select the correct encryption level to match your access point. Either 64, 128, or 256-bit. The encryption level set her must match the encryption level used by your access point.

  • Page 57: Configuring Wpa-Psk

    Manual Input (Hexadecimal): You generate your own WEP Key using hexadecimal characters (10 characters for 64-bit, 26 characters for 128-bit, 58 characters for 256-bit). 5. Click [OK] to save your settings and return to the previous screen. Configuring WPA-PSK 1. Select [WPA-PSK] under [Security Mode]. 2.

  • Page 58: Configuring Wpa2-Psk

    ZyXEL AG-225H User’s Guide Configuring WPA2-PSK 1. Select [WPA2-PSK] under [Security Mode]. 2. Select [Encryption method]. You can choose between TKIP or AES. Most access points use AES for WPA2-PSK. 3. Under [PSK Pass Phrase] enter the same pass phrase used to configure WPA2-PSK on your access point.

  • Page 59: Chapter 6 Troubleshooting

    This chapter covers potential problems and possible remedies. After each problem description, some instructions are provided to help you diagnose and solve the problem. Problems Starting the ZyXEL Utility Program Table 6-1 Troubleshooting Starting ZyXEL Utility Program PROBLEM Cannot start the ZyXEL Make sure the ZyXEL AG-225H is properly plugged in your USB port and the Wireless LAN Utility LED(s) is on.

  • Page 60: Problems Communicating With Other Computers

    ZyXEL AG-225H User’s Guide Problems Communicating With Other Computers Table 6-3 Troubleshooting Communication Problems PROBLEM The ZyXEL AG-225H Make sure you are connected to the network. computer cannot communicate with the other computer. Infrastructure Make sure that the AP and the associated computers are turned on and working properly.

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