Does network grade affect the security of WLAN

The problem of WLAN security has always been our most concerned. So today we are going to talk about this. Look at the network grade problem, will not affect the security of wireless LAN. Wireless connection to the community broadband network, and through the broadband network to share access to the Internet in the network environment, we often only first through the common twisted pair of low-end wireless router WAN port and community broadband network of the exchange port together, Then the reference instructions to the wireless router connection port parameters to the appropriate settings, you can access the Internet. Because in the default state, the low-end wireless router will automatically enable the DHCP service function, when we have the wireless network card device installed correctly on the normal computer, no need to make any parameter settings can automatically connect to the wireless LAN network. However, in the enjoyment of networking facilities at the same time, the low grade wireless router's signal coverage can reach up to 300 meters, if not to take precautions, then the 300 meters within the range of installed wireless network card equipment of the ordinary computer can automatically join the local wireless LAN network, That way, local wireless LANs are vulnerable to illegal attacks.

The security drawbacks of low grade network

1, Wireless LAN Security mechanism is not very sound

Low-grade wireless LAN most of the use of the security performance of the general WEP protocol to the wireless internet signal encryption transmission, but not the use of security can be high WAP protocol to protect the transmission of wireless signals. Ordinary Internet users even use the WEP encryption protocol, with WEP key settings, the illegal attacker can still easily decipher the encrypted signal through some professional attack tools, making it very easy to intercept information such as the client's Internet address, network identification name, wireless channel information, WEP key content, and so on, with this information in hand, Illegal attackers can easily steal privacy or other illegal intrusion operations on the local WLAN network.

In addition, low grade wireless LAN almost does not support the System log management, intrusion detection and other functions, it can be said that the low grade wireless LAN security mechanism is not very sound.

2. Physical isolation is not possible

Low-grade wireless LAN from the establishment of the success of the moment, directly exposed to the outside world, wireless network access can not be any effective physical isolation, a variety of intentional, unintentional illegal attacks at any time, then wireless LAN in a variety of privacy information will be secretly stolen, access.

3, the user security awareness is not enough

Low-grade wireless LANs tend to support simple address bindings, address filtering, and encrypted transmission functions, which have little protection against illegal attackers. However, some people who are not familiar with the wireless network knowledge in order to quickly realize mobile office, resource sharing and other purposes, often will not hesitate to choose the Low-cost Network, management and maintenance of a simple low grade wireless LAN, as to wireless LAN Security performance exactly, It is believed that these novice internet users will hardly take any consideration. Coupled with these novice users who are less familiar with the wireless network knowledge, less aware of the knowledge of the network security, these users in the process of using the wireless network is very little conscious of some security settings operations.

4, the ability to resist external interference is poor

Wireless LAN in the process of working, often choose a specific work frequency band, in the same working band too much wireless network, the signal coverage will overlap each other, this will seriously affect the strength of the effective signal, the end may affect the wireless LAN signal transmission stability; In addition, wireless internet signal in the transmission process, Particularly vulnerable to wall-like buildings such as blocking or interference, this will also have a certain impact on the stability of wireless LAN. For those low grade wireless LAN, its ability to resist external interference is even worse, obviously such wireless LAN is unable to meet the requirements of High-quality network access applications.

Wireless LAN Security Threats under the convenience of networking

Since low grade wireless LANs have some of these security drawbacks, if they suddenly attack or are exploited by an illegal attacker, they can pose a security threat:

1, causing privacy information leakage

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In some cases, many wireless LAN users in order to facilitate the work, often inadvertently will be the unit's important privacy information or core work information, or even some of the confidential category of information through mobile devices to hang up the wireless LAN network, so invisible in the vulnerable to the risk of important private information leakage, Serious time can cause huge economic losses to the unit or individual.

2. Reduce intranet security capability

Unit wireless local Area network Sometimes there will be some home wireless LAN or other units of wireless LAN, these wireless LANs are often used for mobile office or share access to Internet network, these wireless network users are not enough security awareness, And they do not have a high demand for wireless networks, and do not need to do some security for wireless internet access. In this case, any laptop that has a wireless network card installed in the unit may automatically connect to other units of the wireless LAN, so it is easy to occur this unit of wireless LAN and other units of the wireless LAN directly interconnected phenomenon, Even may appear the unit wireless local area network directly with the Internet interconnection phenomenon, these phenomena obviously can reduce the unit intranet security guard ability, easy to cause the unit to have the serious security consequence.

3. Endanger Information System security

Considering the low cost of lower grade wireless LAN network, do not need to carry out complex wiring, management and maintenance is also very convenient, if the security awareness is not in place, then some smaller units are likely for technology, cost and other factors, to choose some inexpensive, poor quality wireless network equipment for networking upgrades, information points of the extension, Networks built from these networks will naturally be exposed to the outside world, wireless network access can not be effective physical isolation, so that the unit's information systems security will be compromised at any time.

Resolving wireless network security threats

Although low grade wireless LAN is easy to bring us a variety of unexpected wireless LAN Security threats, will give the unit of the information system caused no small security risks, but for those who are not very high security requirements of small units, still can choose the low grade wireless LAN, after all, this type of networking cost is very low, More importantly, through the development of effective measures can completely reduce the low grade wireless LAN security threat to a minimum, so that the small unit users can enjoy the networking facilities.

1, to check to be safe

In order to understand the wireless LAN Security status at any time, we should regularly check the unit intranet, extranet usage and the working status of the core network equipment, and make a detailed inspection record. At the same time, we should also increase the intensity of the wireless network in the vicinity of the wireless LAN work environment for dynamic monitoring, a certain time also need to the unit of the Network system security assessment and audit; In addition, for organizations involved in the organization of core privacy information and the implementation of important network applications of the workplace, Electromagnetic shielding should be adopted in time to prevent illegal network intrusion or attack.

2, to the publicity to be safe

Because the low grade wireless LAN is very easy to affect the use of internal network security, for this unit responsible must be prepared rich network security information, in the unit, under the regular development of wireless internet Security knowledge publicity, training, in order to enhance the safety of every wireless Internet users awareness, At the same time, it is necessary to carry out special rectification work of network security, to ensure that all staff can attach importance to wireless LAN security work.

3, to the management to be safe

As the saying goes, "no rules, radius", in order to ensure the use of wireless LAN Security, we also have to make reasonable provisions for the use of wireless network equipment, wireless internet users to reasonably manage, standardize the work mode of wireless network equipment and security settings, clear access to the user's scope of use and access rights; , prohibit the preservation of important unit information notebook computer connected to the wireless local area network, prohibit random in the wireless local area network share access, prohibit the mobile devices to arbitrarily hang wireless LAN, for storage, processing the core information of the workplace must be shielded protection and so on.

I believe in a sober understanding of the existence of low-level wireless LAN security threats, as long as we take effective wireless LAN security measures to prevent, or can enjoy the convenience of wireless network, so that low grade wireless LAN can also be very good for us to provide "services."