Wireless Security Settings

For network experts, it is not difficult to perform some wireless security settings, but for most users, it is not very familiar with these settings, so let's start with the basics.
 
1. Pay attention to the AP Login Password
 
To ensure the security of your wireless LAN, you must change the default password of Your Wireless AP or Wireless Broadband Router.
 
As you know, the login usernames and passwords of many Wireless AP or wireless broadband routers are "admin" by default or the manufacturer's English names for short, such as "TP-LINK, SMC, and so on ", in this way, any user can easily enter Your Wireless AP or Wireless Broadband Router to set up and modify information. What's more interesting is that users who know more about broadband can also obtain your broadband password. Therefore, it is best to change the default login password to your own easy-to-remember password, so that illegal users can easily control Your Wireless AP or Wireless Broadband Router.
 
2. Pay attention to SSID settings
 
The full name of SSIDSSID is ServiceSetIdentifier. It is the domain name shared by a group of wireless regional network devices. The same SSID must be set for each node in the wireless network for mutual transmission. Therefore, the wireless workstation must display the correct SSID, which is the same as the SSID of the Wireless AP or Wireless Broadband Router to access the Wireless AP or Wireless Broadband Router; if the displayed SSID is different from that of the Wireless AP or Wireless Broadband Router, the Wireless AP or Wireless Broadband Router will reject the access through the service area.
 
Therefore, the SSID can provide a simple password authentication mechanism to ensure wireless network security. In addition, the SSID can be used to distinguish different networks and can contain up to 32 characters. The network adapter can access different networks with different SSID settings. The SSID is usually broadcast by a Wireless AP or a Wireless Broadband Router, you can automatically find the SSID in the current wireless area through the wireless network card or the scanning function provided by Windows XP.
 
As you know, to control the security of wireless networks, You can generally start with access control and data encryption. The access control ensures that only authorized users can access sensitive data, and the SSID is like this. In actual settings, most Wireless AP or wireless broadband routers are "Allowed to broadcast SSID" by default when leaving the factory, to make the wireless LAN more secure, you can go to the configuration page of the Wireless AP or Wireless Broadband Router and set the SSID to "do not broadcast SSID", so that other users want to automatically enter your wireless LAN, you must manually enter the correct "SSID" to enter the network, which ensures the security of the LAN.
 
Of course, SSID control is not omnipotent. for multi-user wireless systems, especially public wireless systems, its security is also difficult to completely guarantee, because users need to configure their own client systems, this allows many people to know the SSID, which is easy to share with malicious illegal users. Some wireless network adapters have strong functions and can query the SSID on the wireless network. At present, some manufacturers' products support the "ANY" Special login method, as long as the wireless network adapter on the computer is in the signal coverage of the Wireless AP or Wireless Broadband Router, it will automatically connect to the Wireless AP or Wireless Broadband Router, which is a test of the SSID security.
 
3. Set MAC Filtering
 
What is MAC? Different from the IP address, the MAC (MediaAccessControl) address is the physical address of the nic and the identifier used to identify the LAN computer. The length is 48-bit binary, from 12 00 ~ 0FFH consists of hexadecimal numbers. Each hexadecimal number is separated by a hyphen (-). The MAC address of a wired network card or a wireless network card is unique in the world, therefore, the MAC address and preset network ID are used to limit which NICs and access points can be connected to the network, ensuring network security. For illegal recipients, it is very difficult to intercept the signals from the wireless LAN, which can effectively prevent hacker and intruder attacks.