Today, many people like the wireless network because it is free and easy to use, but when we don't want to share the network with others and prevent others from smashing the network, then we can choose to use the wireless router. encryption. So how do you set it up? Let’s take a look! I. Setting the Network Key The Wireless Encryption Protocol (WEP) is a standard method for encrypting data transmitted over a wireless network. Most wireless devices now only have WEP encryption, and more secure WPA encryption has not been widely used. Currently, there are two types of key types for wireless routers or APs. For example, the wireless router used has 64-bit and 128-bit encryption types, and 10 or 26 strings are respectively input as encrypted passwords. Here to remind you, many wireless routers or APs are shipped from the factory, the data transmission encryption function is turned off, if you use it without further settings, then your wireless network has become a "no defense" device . Therefore, it is extremely important to encrypt your wireless network. Test results: 64-bit encryption was selected. In the actual test, the existence of the wireless network was discovered by software such as NetworkStumbler, but the wireless network could not be used because the password could not be obtained. Second, disable SSID broadcast In layman's terms, SSID is the name you give to your own wireless network. It should be noted that the same manufacturer's wireless router or AP uses the same SSID. Once an attacker attempting to connect illegally uses a common initialization string to connect to the wireless network, it is easy to establish an illegal connection. This poses a threat to our wireless network. Therefore, it is recommended that you name your SSID as a more personal name. Wireless routers generally provide the "Allow SSID Broadcast" feature. If you don't want your wireless network to be searched by someone else through the SSID name, then it's best to "disable SSID broadcasts." Your wireless network can still be used, but it won't appear in the list of available networks that others have searched for. Tip: After disabling the SSID broadcast setting, the efficiency of the wireless network will be affected to some extent, but in exchange for the improvement of security, it is considered worthwhile. Test results: Since there is no SSID broadcast, the wireless network is ignored by the wireless network card, especially when using Windows XP to manage the wireless network, it achieves the purpose of "shadowing". Third, disable DHCP DHCP function can automatically assign an IP address to each computer in the wireless LAN, without the user to set the IP address, subnet mask and other required TCP /IP parameters. If DHCP is enabled, others can easily use your wireless network. Therefore, disabling the DHCP function is necessary for wireless networks. Set the DHCP server to "Do not enable" under the "DHCP Server" setting of the wireless router. Test result: Since the IP address and DNB server information cannot be obtained, even if the wireless network signal can be found, the network cannot be used. 4. Enable Mac address and IP address filtering In the settings of the wireless router, when MAC address filtering is enabled, it should be noted that in the "Filtering Rules", you must select "Allow only the MAC address list has been valid." Mac address access to wireless network" options. In addition, if the DHCP function is disabled in the WLAN, it is recommended that you set a fixed IP address for each computer that uses the wireless service, and then enter these IP addresses into the IP address allow list. After the IP address filtering function of the wireless router is enabled, only users with IP addresses in the list can access the network normally, and others can only blink. Test results: After MAC address filtering and IP address filtering are set, even if someone barely invades the wireless network, the wireless network is still unavailable because the Mac address and IP address are disabled by the filtering function of the wireless router.