Manual ZyXEL AG-225H v2 (page 34 of 102) (English)

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ZyXEL AG-225H v2 User’s Guide

34 Chapter 3 Wireless LAN Network

• Every device in the same wireless network must use security compatible with the AP or

peer computer.

Security stops unauthorized devices from using the wireless network. It can also protect

the information that is sent in the wireless network.

3.2 Wireless LAN Security

Wireless LAN security is vital to your network to protect wireless communications.

Configure the wireless LAN security using the Configuration or the Profile Security Setting

screen. If you do not enable any wireless security on your AG-225H v2, the AG-225H v2’s

wireless communications are accessible to any wireless networking device that is in the

coverage area.

Note: You can only use WEP encryption if you set the AG-225H v2 to Ad-hoc or AP

mode.

See the appendices for more detailed information about wireless security.

3.2.1 Hide SSID

Normally, the AG-225H v2 in AP mode acts like a beacon and regularly broadcasts the SSID

in the area. You can hide the SSID instead, in which case the AG-225H v2 in AP mode does

not broadcast the SSID. In addition, you should change the default SSID to something that is

difficult to guess.

This type of security is fairly weak, however, because there are ways for unauthorized wireless

devices to get the SSID. In addition, unauthorized wireless devices can still see the

information that is sent in the wireless network.

3.2.2 MAC Address Filter

Every device that can use a wireless network has a unique identification number, called a

MAC address.

A MAC address is usually written using twelve hexadecimal characters

; for

example, 00A0C5000002 or 00:A0:C5:00:00:02. To get the MAC address for each device in

the wireless network, see the device’s User’s Guide or other documentation.

You can use the MAC address filter to tell the AG-225H v2 in AP mode which devices are

allowed or not allowed to use the wireless network. If a device is allowed to use the wireless

network, it still has to have the correct information (SSID, channel, and security). If a device is

not allowed to use the wireless network, it does not matter if it has the correct information.

1. Some wireless devices, such as scanners, can detect wireless networks but cannot use wireless

networks. These kinds of wireless devices might not have MAC addresses.

2. Hexadecimal characters are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, and F.

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ZyXEL AG-225H v2 Manual

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