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Wireless 101. Brian Heil Consultant, Ezrasoft Consulting & Design. Overview. Why Wireless? Security Bandwidth Cost. Why Wireless?. ‘Fixed’ wireless network Dubuque County Library Epworth Branch Wireless ‘HotSpot’ What are you providing? What are the risks? What is the cost?.

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Presentation Transcript
wireless 101

Wireless 101

Brian Heil

Consultant, Ezrasoft Consulting & Design

overview
Overview
  • Why Wireless?
  • Security
  • Bandwidth
  • Cost
why wireless
Why Wireless?
  • ‘Fixed’ wireless network
    • Dubuque County Library Epworth Branch
  • Wireless ‘HotSpot’
    • What are you providing?
    • What are the risks?
    • What is the cost?
security
Security
  • Wireless networks are basically insecure
  • What can we do to fix it?
    • Throw money at the problem
    • Take steps to mitigate the risks
securely configured wlan translation
Securely Configured WLAN(translation $$$)

- from Internet Security Systems Wireless LAN Security Technical Whitepaper

security risk mitigation
SecurityRisk Mitigation
  • Do not use default configuration options on Access Points (wireless routers) – the bad guys know all of these!
  • Use as much security provided by the Access Point as possible
    • WEP
    • WPA
    • Hide AP as much as possible
security risk mitigation1
SecurityRisk Mitigation
  • Cover only areas you want to have access. Leakage and maximum transmit power widen the attack surface.
  • Client protection
    • Personal firewalls
    • Up to date virus scanners
bandwidth
Bandwidth
  • 802.11b bandwidth is 11 Mbps
  • 802.11g bandwidth is 54 Mbps
  • What is your bandwidth out of the building?
    • all LAN and WLAN nodes share this pipe
bandwidth1
Bandwidth
  • Access points provide limited connectivity
  • How many connected clients will you allow = how many Access Points you will purchase.
  • More potential problems with configuration of APs
slide10
Cost
  • SOHO vs Enterprise equipment
  • Number of clients
  • Security costs money
    • Hardware costs
    • Staff costs
policies
Policies
  • In lieu of money your WLAN policy is the key
policies1
Policies
  • Before you implement WLAN consider
    • What you are offering and why
    • Security risks to your LAN
    • Cost of installation as well as cost of maintaining security
    • Impact on current infrastructure
questions
Questions?
  • http://www.ezrasoft.com/ila
    • Slideshow
    • Links to resources
    • See especially the article from WebJunction entitled: Ten Steps to Wireless Internet Access in Your Library
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