Wireless Security: SSID, MAC, WEP, and VPN ensure WLAN Security

Wireless Network security issues are becoming increasingly prominent. How can we deal with them? Here we introduce several basic network security technologies, including SSID, MAC, WEP, VPN, and WLAN.

At present, the wireless LAN products mainly adopt the IEEE802.11b international standard. The 802.11 standard mainly applies three security technologies to ensure the security of data transmission over the wireless LAN. The first is SSIDService Set Identifier. This technology divides a wireless LAN into several sub-networks that require different authentication. Each sub-network requires independent authentication, only authenticated users can Access the corresponding sub-network to prevent unauthorized users from accessing the network. The second is MACMedia Access Control, you can set a MAC address list for users with Access permission under each Access Point AP and Access Point of the wireless LAN. the MAC address is not included in the list, and the Access Point is) the access request will be rejected. The third item is WEPWired Equivalent Privacy. WEP Security Technology originated from the RSA Data Encryption technology named RC4 to meet users' high-level network security requirements.

Currently, these technologies have been developed and fully applied. For example, Intel's 11 Mbps wireless LAN product series last year fully supports WEP's password encoding function. After the data is encoded with a password key of up to bits, it communicates with the AP adapter, the password key length can be 40 bits or bits. MAC addresses and preset network IDs are used to restrict 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. In addition, VPNVirtual Private Networking, which has been widely used in local area networks and remote access, can also be used in wireless local area networks. It is different from the security technology adopted by IEEE802.11b, VPN mainly uses DES, 3DES and other technologies to ensure the security of data transmission. For users with higher security requirements, experts suggest combining the existing VPN security technology with the IEEE802.11b security technology to provide an ideal security solution for wireless local area networks.