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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


Wireless 101
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