The following four suggestions will help you to ensure your security while expanding your network coverage.
The coverage of a wireless network refers to the area it can effectively cover, and refers to the physical area that can effectively access it. In most cases, the expansion of the wireless network is a good thing, even if it is only used to brag. A larger scope means more flexible access to the network. From a certain perspective, you want your wireless network to be as wide as possible. Obviously, a larger range can cover more area and provide better usability.
On the other hand, an increase in coverage will also increase the risk of malicious attacks on the network. The coverage of a network is more or less affected by the configuration of the access point. For an intruder, the first entry into the WLAN is of course the access point (AP).
This is why managing network coverage often requires balancing security risks and coverage expansion. Simply put, the expansion of network coverage necessarily means increased security risks. So while you are expanding your network, you must remember to pay enough attention to security issues.
As your network expands, there are some things that must be standardized by the system:
Reduce informal network expansionWhen you need to add APs, you should add them as normal:
Request to increase coverage.
An assessment of the user load that the AP will handle.
Make an assessment of the risk of leakage and potential signal interference in the local environment.
Authorize someone to be responsible.
Detailed records on AP installation and testing.
Extending the wireless network through the AP is too simple, so this is a very powerful temptation. But the question is, what problems and risks will we bring if we expand our network coverage in an office building?
Control the coverage of local APsYour network has coverage, as does the AP. Here are some rules to help you prevent information leakage while providing better signal coverage:
Keep the AP as far as possible from the window as much as possible.
In the room, install the AP as high as possible.
Make sure the AP is not too close to another RF source. (The computer itself may cause interference, do not let the two APs next to each other.)
Carefully choose the antennaDifferent types of antennas are available in different environments. The principle is to keep the signal in your office area where high-quality network connections can be made, while on the outside, connections are prevented as much as possible. Here are some good suggestions:
For centralized APs, omnidirectional antennas are used.
Let the antenna straight up.
Consider using a directional antenna around the office area to prevent signal leakage. If you can't change the antenna of an AP near the perimeter of the office area, point it to the center of the office area.
Maintain an appropriate user/AP ratioAnother issue with network coverage control is the utility of individual APs. It is important to maintain the appropriate user/AP ratio. 20:1 is the upper limit of what I think. Keep in mind the effective range of the AP. Signal interference is unlikely to occur outside of 150 feet in a physical room. Calculate the number of APs needed based on this principle and design their distribution.
When you increase the AP signal strength to improve the efficiency of your wireless network, remember to consider security issues at the same time. The signal is enhanced, and in the office area, of course, a higher quality network connection can be provided, but at the same time, the enhanced signal may be leaked to the outside highway. Attention to these details can help you stop the invasion of malicious users.
It is important to remember that the coverage of a rogue AP is inherently unplanned and uncontrollable. One of the axioms of control system theory is that you can't control what you can't observe. Since illegal APs can slip into a wireless network that is designed to be perfect at any time, the solution is to constantly monitor. You can use a lot of free software to find illegal APs.
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