Securing Wireless Technology
Another professional and intellectual presentation of Phillip Speagle
Contents
Sample Network
Infrastructure
Wireless Standards
Accessing Wireless
Router GUI
Wireless Security
Setup
•Service Set
Identifier (SSID)
•Password (GUI
Interface)
•MAC Filtering
•Encryption
Network Infrastructure
What You Need
Hi-speed
Internet
Access
•At&t, Charter,
Embark, Time Warner
Wireless
Device
•Computer, Ipad,
Game system, etc
Cable/DSL
Modem
•Motorola, Belkin,
Dlink, Linksys
Wireless
Router
•Linksys, Dlink, Belkin,
Netgear
Money
•U.S. Curreny, Pesos,
Yen, or Deblumes
Wireless Standards
802.11a
•5ghz, 54Mbps, 50ft
Range
802.11b
•2.4ghz, 11Mbps, 90100ft. Range
802.11g
•2.4ghz, 54Mbps, 90100ft. Range
802.11n
•2.4 or 5ghz, 144Mps,
150ft Range
Accessing Web Based Utility
Linksys Routers
(192.168.1.1)
•Username: <blank>
Password: admin
D-Link Routers
(192.168.0.1)
•Username: admin
Password: <blank>
Netgear Routers
(192.168.0.1)
Belkin Routers
(192.168.2.1)
Be sure to always
check your
documentation
•Username: admin
Password: password
•Username: admin
Password: <blank>
Linksys Simulation
Wireless Security Setup (SSID)
Establish a
new SSID
• Name of your wireless network
Turn off
broadcast
• Routers default by broadcasting
the SSID to devices
Wireless Security Setup (Default
Password)
Change the default web utility password
Choose an alpha-numeric password
For example: Hellokitty80, or H3ll0k1tty80!
Wireless Security Setup (MAC
Filtering)
Each network card has a special 10-digit identifier, sometimes
referred to as Physical Address. For example: 00-12-5E-8A-99
WEP
• Wired Equivalent Privacy
• Introduced in 1997
• Old insecure encryption
TKIP
• Temporal Key Integrity Protocol
• Dynamically changes the key as the system is used
• Replaced WEP as a more secure encryption
CCMP
• 128-bit encryption
• Data Confidentiality, ensures only authorized
parties can access the information
Replace standard antenna with a hi-gain antenna
Make sure Signal-to-Noise Ratio is 25dB or higher. Optimum is
>40dB
Centralize your wireless router
Use equipment from the same company. (For ex. Linksys router
with Linksys wireless cards)
Add a wireless repeater
Reduce interference from cordless phones and other 2.4ghz
devices such as microwaves
Update router firmware and wireless cards
http://www.microsoft.com/athome/setup/wirelesstips.asp
http://www.wirelessnets.com/resources/tutorials/define_SNR_values.html