ALL ABOUT THE PRECAUTIONS AND SECURITY MEASURES NEED TO BE TAKEN IN ORDER TO PREVENT UNAUTHORIZED ACCESS TO UR WIRELESS NETWORK

1. Securing a Wireless Network

2. Wireless Network Security Presented by : Aurobindo Nayak Regd.No.>0701288307

3. AGENDA: Wireless network overview IEEE Specifications Security considerations Security vulnerabilities Solutions and precautions Questions and comments

4. Wi-Fi is an abbreviation for Wireless Fidelity and a catch all phrase for the several different standards and recommendations that comprise wireless networking. Wi-Fi enables the user to deploy a computer network without needing to run cable throughout the facility. What is Wi-Fi:

5. Standards: IEEE 802.11.b –2.4GHz – 11Mbps IEEE 802.11.a – 5GHz – 54 Mbps IEEE 802.11g – 2.4Ghz – Hybrid 11/54Mbps

6. IEEE 802.11.a 5GHz – 54Mbps International standard for wireless networking that operates in the 5 GHz frequency range (5.725 GHz to 5.850 GHz) with a maximum 54 Mbps data transfer rate. The 5 GHz frequency band is not as crowded as the 2.4 GHz frequency, because the 802.11a specification offers more radio channels than the 802.11b. These additional channels can help avoid radio and microwave interference. Cost of 802.11a equipment is approximately twice that of 802.11b and current deployment is limited.

7. IEEE 802.11.b 2.4GHz – 11Mbps International standard for wireless networking that operates in the 2.4 GHz frequency range (2.4 GHz to 2.4835 GHz) and provides a throughput of up to 11 Mbps with a range of just over 300 feet indoors. This is a very commonly used frequency. Microwave ovens, cordless phones, medical and scientific equipment, as well as Bluetooth devices, all work within the 2.4 GHz frequency band. 802.11b enables transfers of up to 11 Mbps. Comparable to 10BaseT in speeds, 802.11b is the most common wireless standard deployed today. In comparison T1 speeds are 1.54Mbps and DSL is normally in the 640Kbps range.

8. Securing a Wireless Network: Most wireless networks today use the 802.11 standard for communication. 802.11b became the standard wireless ethernet networking technology for both business and home in 2000. The IEEE 802.11 Standard is an interoperability standard for wireless LAN devices, that identifies three major distribution systems for wireless data communication: Direct Sequence Spread Spectrum (DSSS) Radio Technology Frequency Hopping Spread Spectrum (FHSS) Radio Technology Infrared Technology

9. Independent Basic Service Set (IBSS)

10. [Basic Service Set (BSS)] Network

11. Extended Service Set (ESS) Network

15. War driver mapping

16. Antenna on the Cheap (er, Chip) - Pringle's can’s antenna

17. traffic redirection - modifying ARP tables

18. resource stealing - using a valid station's MAC address

19. rogue networks and station redirection [network administrators also rely on manufacturers' default Service Set IDentifiers (SSIDs)

21. If an attacker flips a bit in the cipher text, then upon decryption, the corresponding bit in the plaintext will be flipped. Also, if an eavesdropper intercepts two cipher texts encrypted with the same key stream, it is possible to obtain the XOR of the two plaintexts. Once one of the plaintexts becomes known, it is trivial to recover all of the others.

23. "Key-hopping" technology that can change the encryption key as often as every few seconds.

24. EAP-TTLS (Extensible Authentication Protocol (EAP) -Tunneled Transport Layer Security)

25. Enhanced Security Network (ESN) - Extended Service Set with : enhanced authentication mechanism for both STAs and APs based on 802.11x enhanced data encapsulation using AES dynamic, association-specific cryptographic keys key management

27. log attempts to gain unauthorized access to the network

28. filter access attempts based on the type of network card

29. conduct site survey of traffic usage

31. Questions? Comments?