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Wlan security
| Added: 12-07-2007 Author: Igor Bartolic Category: Broadband Internet |
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Physical security is an important part of security. If you do not have physical access to the Internet, you can not use it. If you can not plug the network cable. This is the cable said.
A security problem in wireless networks, is the lack of physical security.
802.11 standards use Authentication as a substitute for physical security. The problem is that if prayer is to use WEP encryption.
WEP - Wired Equivalent Privacy We can not name. It doesn't take more than 2 minutes, with the tools Cracking, breaking WEP.
The first version had been using WEP 64-bit shared key . 40 bit is the secret together, and 24 bits for the IV (initialization vector). IV is that the receiver can be used to decrypt the frame.
Further improvement is the first WEP key 128-bit WEP shared . Although the version used 104 bit WEP in sharing and initialization vector 24.
IEEE 2004 is proposed in the new version of the WEP -- WEP2 . RC4 is the same algorithm and uses 128-bit initialization vector. No big WEP2 improve security. Only when Cracking increases.
The next step in wireless security WPA - Wi-Fi Protected Access .
What WPA encryption? Wi-Fi Alliance launched October 2003 Wi-Fi Protected Access - WPA , The next generation WLAN security. Wi-Fi Protected Access does not require the equipment to repair equipment 802.11.
Software and firmware upgrades only required is small and does not damage the network performance.
WPA was designed as an answer to all WEP weaknesses. Use Temporal Key Integrity Protocol (TKIP) with Message Integrity Check (MIC) . Also, each pre-shared (PSK) authentication scheme using 802.11X/EAP .
Wi-Fi Alliance launched WPA2 September 2004. This is the version of WPA certified operation. Instead WPA2 PSK 802.1 X / EAP authentication, using sophisticated encryption systems.
This new system Counter-Mode/CBC-MAC Protocol (CCMP) called Advanced Encryption Standard (Aep) .
WPA and WPA2 certification has 2 modes.
- Enterprise
- Personal
You have 4 different versions of Wi-Fi Certified devices : 1) WPA-Personal
2) WPA2-Personal
3) WPA-Enterprise
4) WPA2-Enterprise
Personal Mode designed for home office (SoHo) environment. You do not need authentication server (Radius or IAS).
He is entered manually using PSK (pre-shared key or pass-phrase). The level of your wireless network security under this PSK.
So, using a combination of letters, numbers and non-alphanumerical characters .
Personal mode uses an encryption method as the Enterprise-per-user, per-session, per-packet and TKIP encryption (WEP) or AES (WEP2).
Enterprise Mode works in managed mode and the authentication server (Radius or IAS). This mode can meet your business needs strict security.
Many wireless access point and router options MAC filtering . With MAC filtering, you can find the centers that MAC filtering you have entered the list.
The main key is the wireless security settings many obstacles as you can. If, while the use of WEP, WPA, MAC filtering, and if you use IP Security SSH Tunnel and then secure your wireless network if it's bugged.
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