6 Configuring Frequently Used Functions
6-9
6.5 Improving the Security of a WLAN
The signals of a WLAN are transmitted in the air. Therefore, unauthorized persons can
receive the wireless signals easily. If the wireless signals are not encrypted, unauthorized
persons may use your WLAN or obtain the data transmitted on the WLAN. To ensure the
security of the data transmitted on the WLAN, the terminal provides multiple
security-related settings for the WLAN function. You can change these settings as
required to protect your WLAN from unauthorized access.
6.5.1 Hiding the Name of a WLAN
Function Overview
When accessing a WLAN, the user of a wireless client needs to enter the correct name of
the WLAN, that is, the service set identifier (SSID) of the WLAN. Generally, the
wireless signals transmitted from a wireless terminal carries the SSID. The wireless
adapter of a PC can find and display the SSID for selection and confirmation. Thus,
manual operations for selecting and
configuring the WLAN can be simplified. The
SSID, however, is not encrypted. Therefore, anyone can find the
WLAN, and then view
the SSID, and the security of the WLAN is reduced.
The terminal provides the function of hiding the SSID. After this function is enabled, the
wireless signals transmitted from the terminal do not carry the SSID. Thus, it is not
possible for unauthorized people to obtain the SSID from the wireless signals. In
addition, the user of a PC needs to enter the correct SSID manually to add the PC to the
WLAN. Thus, the security of the WLAN is increased.
The terminal also provides the multi-SSID function. You can configure 4 SSIDs, and
then enable one or multiple of them.
Through the multi-SSID function, multiple virtual access points of a WLAN can be
established. For a wireless client, each virtual access point can be used as a physical access
point. In addition, each virtual access point has its SSID
.
You can disable the SSIDs that are not required. After an SSID is disabled, a wireless
client cannot connect to the WLAN that is indicated by this SSID. Note that all the
external connection channels of a WLAN are closed if all the SSIDs of the WLAN are
disabled. To use the WLAN, you need to enable the WLAN function and at least one
SSID. In addition, to use the WPS function, you should enable
SSID1
.
Configuration Example
To use and hide
SSID1
and disable the other SSIDs (so that the WLAN cannot be found
by others), do as follows:
Step 1
Log in to the Web-based configuration utility.
Step 2
Choose
Wireless
>
Basic
in the navigation tree.
The WLAN configuration page is displayed.
Step 3
Enter
SSID1
in the
SSID
text box.
