【 Weak current College 】 ignored wireless LAN fault interrogation

Wireless network failures can occur at any time, as a result of reasons may be many network administrators have a headache, how do they happen, is that each network management efforts, the most important thing is not neglected WLAN failed interrogation.

Standard based on IEEE802.11 WLAN gradually entering mainstream network that allows for wireless network troubleshooting and security has become just as important as the wired network. Support multiple patterns Analyzer can scan all 802.11 band, including 2.4GHz and the 5 GHz band in all channels and to graphically display, from the chart you can see the configuration is reasonable and what is the signal to noise ratio SNR, can take advantage of many of the bandwidth and other related issues. If an AP appear prominently flow, it may be because there are many client is Internet access via the AP; on the other hand, it is also possible that a particular application or protocol is bandwidth intensive. Technical staff to bring wireless Analyzer you can search for "send flow up to quickly determine whether" have MP3 download, download applications such as BT, which in a wireless network is prohibited.

RF signal failure

Unlike a wired network, wireless network performance will vary according to the AP and client location changes and environmental change. When a client roams to the RF signal is weak, can cause the wireless network's blind spot. These gaps will impact on some applications, such as those based on wireless network for VoIP applications.

Troubleshooting steps

When a user encounters a wireless connection failure, usually seek internal IT support staff will assist you. Technicians use the tester can successfully log on the client location, the problem of wireless networks in configuration of client devices or permissions. If tester cannot connect to the server, the problem may be wireless or wired network physical layer aspects. In addition, there is not enough bandwidth, request queue time-out, interference and other conflict may also be the root cause of the failure.

Network members use wireless Tester from fault location scan wireless network environment can measure signal strength and the performance of the AP. In passive mode, the detector signal wireless adapter receives only, do not send data. If the quality to meet the requirements of RF, administrators can use the client mode login wireless network for testing, for example login test, PING and throughput test.

Support for security testing

The previously mentioned, the wireless network is dynamic, deployment is completed, the sometimes due to human error, sometimes due to increased wireless network access coverage into some unauthorized devices. Very often, because the wireless network is to provide access service in three-dimensional space, so unauthorized AP may join in. In addition, it may also be due to design errors lead to this result.

Network review

From a security perspective, according to forecasts, in 2006, 70% of malicious attacks by AP or client error configuration of security vulnerabilities. Wireless testing tools can help enterprises regularly review AP and client configuration, see the configuration is in line with the company security policy.

Research institutions recommend Enterprise periodically check the device configuration, if you select WPA Enterprise network, PEAP is a valid authorization, the administrator needs to verify that all of the access point is configured to PEAP.

On the wireless network site surveys conducted periodically is necessary, network management, you can use a handheld tool for analysis of RF signal quality, view performance is decreased.