The objective cause of Windows XP wireless network security instability is still viruses and malicious users: service theft, data theft, data corruption, and the normal use of wireless networks. The following steps will be answered for the reader!
Or the above sentence: "Simple is synonymous with insecurity", the biggest factor of XP's wireless security risk is precisely the most easy-to-use function from XP - - "Wireless Zero Configuration" (WIRELESS? ZERO? CONFIGURATION), since the access point can automatically send and receive signals, once the XP client enters the coverage of the wireless network signal, it can automatically establish a connection if it enters multiple wireless The signal coverage of the network, the system can automatically contact the nearest access point, and automatically configure the network card to connect. After completion, the SSID of the established connection will appear in the "Available Network", because many manufacturers use half of the network card. The Mac address is named SSID by default, so the default name of the SSID can be inferred. After the attacker knows the default name, at least the network connected to the access point is a breeze. Windows Home www.Windowszj.com
There are three main measures:
1. Enable the non-broadcast function of wireless devices, and do not spread the SSID.
This function needs to be found in the options of the hardware device. When it is enabled, the network will be closed.
At this time, the person who wants to connect to the network must provide an accurate network name instead of the network name automatically provided by the XP system.
2, using irregular network name, prohibit the use of the default name.
If it is not broadcast, the attacker can still connect to the network by guessing the network name, so it is necessary to modify the default name.
The irregularities here can learn from password setting techniques and do not set the network name with sensitive information.
3, the Mac address of the client filter having only the specified set
Mac client can connect the access point may be connected to the person further checks.
The above three methods are only the primary settings of XP wireless security. Don't expect to be able to sit back and relax after setting these three steps. From the current security settings, although some wireless attacks can be guarded, It does not take any encryption measures on the data in transit. Therefore, as long as the attacker uses some specific wireless LAN tools, it can capture various data packets in the air, and through the content analysis of these data packets, various information can be obtained. This includes the SSID and Mac address, so the first three methods are ineffective for this kind of attack. Our next step is the encryption of wireless transmission ----WEP.
This is a very controversial topic. Therefore, in order to avoid getting into the misunderstanding, we will not explain the strengths and weaknesses of this issue in detail, but only one sentence: "WEP provides data security for wireless LAN. Sex, integrity, and data source authenticity is more comprehensive security, but the WEP key is easily obtained by attackers." Although the current manufacturers have strengthened this, Microsoft has released related upgrade packages (KB826942, support.microsoft.com/default.ASPx?scid=kb;zh-cn;826942), but this problem cannot be fundamentally solved. .
WEP runs on the access point. If we enable WEP on 2000, we must use the shared key provided by the client software. If it is XP, it will not be needed, and the system will access it for the first time. When WEP is enabled, prompt for the following configuration: After entering the key, continue with the following configuration:
1. Open “Network Connection” and click the properties of the wireless network card.
2, select "Preferred Network", select or add an entry, and then click Properties.
3, open the "wireless network properties" and do the following:
(1) modify the "network name"
(2) tick "data encryption (WEP)"
(3) will "Network Authentication" tick
(4) Select the "key format" (ASCII or hexadecimal) and "key length" (40 or 104) that match the access point.
(5) Need to enter the correct "network key"
(6) Do not select "automatically select the key".
4, save off.
OK, the settings for WEP under XP are basically completed, but for the wireless network is more stable
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