Configuring your home wireless network
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Configuring your Home Wireless Network. Presented by Lou Koch March 14, 2006. Adapted from Presentation at APCUG By Jay Ferron ADMT, CISM, CISSP, MCDBA, MCSE, MCT, NSA-IAM. Questions. How many of you have more than one computer at home?

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Configuring your home wireless network l.jpg

Configuring your Home Wireless Network

Presented by Lou Koch

March 14, 2006

Adapted from Presentation at APCUG

By Jay Ferron


Questions l.jpg

  • How many of you have more than one computer at home?

  • How many of you connect to the Internet using broadband (Cable or DSL)

  • How many already have a home router?

  • Already have a wireless router?

    For those who have not already done so, we will show you how to install a WLAN tonight.

    More critically we will discuss ways to secure your wireless network

Agenda l.jpg

  • Connecting things together

  • Home network - terminology

  • Security – Firewalls, Filtering, etc

  • Setting up a home router

  • Setting up Print and File Sharing

  • Questions

Home network l.jpg
Home Network

  • Internet – ISP

    • Wire to home

  • Modem

    • Translates electronic data

  • Router

    • Disperses electronic data

  • Network Adaptor

    • Required for each Computer

    • Wired

      • NIC (network interface card) or ethernet card

    • Wireless

      • Wireless Adaptor

Network one or more devices connected together l.jpg
NetworkOne or more devices connected together

  • To the Internet with a router

  • To each other in order to share Resources:

    • Internet Connections

    • Sharing Files

    • Sharing Printers


    • WAN – Wide Area Network … many computers, locations

    • LAN – Local Area Network … few computers, 1 location

    • PAN – Personal Area Network … home network

    • WLAN – Wireless Local Area Network

  • Wireless l.jpg

    • Wireless Networking Standards

      • 802.11 a, b, and g

        • configuration specifications to insure compatibility

        • Different speed/range capabilities

      • Equipment conforming to “g” is most popular/available

        • Good for 100-400 feet … in a house

      • General rule – don’t mix equipment made to different standards

    • Bluetooth

      • Standard which is often used for peripheral devices

        • Printers, scanners, cell phones, etc

        • Short range (10 ft), high speed

    What is a cable dsl modem l.jpg
    What is a Cable/DSL Modem

    • Modem (modulator/demodulator)

      • encodes/decodes information transmitted to the internet

    • Usually provided and controlled by your ISP

    • Connects your home to the Internet.

    • This is the device that gets your public IP (internet protocol) address

    • Normally has no firewall protection

    What is a router l.jpg
    What is a Router

    • Connects one network to another … Sometimes called a “Gateway”

    • Connects your computer to the internet (cable modem or DSL Line) – keeps LAN traffic local

    • Routers keep track of IP addresses and physical (MAC) addresses of hosts

      • IP (Internet Protocol) address … your computers internet address

      • MAC (Media Access Control) … id for each physical communication device

    What is an access point l.jpg
    What is an Access Point

    • A point where computers access a network

      • Device which links wireless users to network

      • Transmits and receives data (Transceiver)

      • Bridge between wireless and wired networks

    • Can be linked together to cover broad area

    • No security or firewall implemented

    What is a firewall l.jpg
    What is a Firewall

    • A device that filters packets of data or traffic

    • Its job is to be a traffic cop

    • You configure the firewall:

      • What will allow to pass

      • What will it block

    • Hides your home network from the outside world

    • Can be either in hardware or software

    • Most popular routers for home have built in firewall protection

    What does a firewall do l.jpg
    What Does a Firewall do?


    • Protect your home computer from the bad guys

    • Keep your information private

    • Make you less of a target


    • Stopping viruses

    • Hiding your computer from the world

    • Making the bad guys work harder to get your info

    Firewall protection l.jpg



    Home Network

    Firewall Protection

    • Checks incoming traffic from the network before it gets to your home network …. default – Blocks all Incoming connections

    • Traffic leaving your home network … default - Allow all outbound connections

    • Hardware firewalls protect you home network by stop all traffic before it get to your computers

    • Personal software firewall on your computer blocks incoming and outgoing (lets you know what is leaving your computer)

    Hardware firewall routers l.jpg
    HardwareFirewall Routers

    The idea is layers of protection

    • Examples of home combo units include

      • Belkin(we will demo tonight)

      • Dlink

      • Linksys

      • Netgear

    Software firewalls l.jpg
    Software Firewalls

    • Adding a second level of protection

    • Controlling what leaves your computer

    • By being aware of application level attacks

    • By allow you to schedule

      • Usage of the internet by time (control access at night)

      • By location (block content for young children)

    Software firewalls for home use l.jpg
    Software Firewalls for Home Use

    • Examples

      • Zone Alarm (Free)

      • McAfee Firewall

      • Symantec’s Norton Personal Firewall

      • Computer Associates with Firewall (free)

      • Windows Firewall in XP Service Pack 2 (free)

    Configure wireless firewall router overview l.jpg
    Configure Wireless Firewall/router Overview

    • Basic Settings … name, ip address, etc

      Check for firmware updates

    • Set Account name and password

      Change name and password … don’t used default

    • Wireless Settings

      SSID broadcast …

      make sure that remote computers are set to automatically connect

      Do not enable DMZ

      Do enable ping blocking

    • Security - Blocking and Filtering

      Wireless Security encryption

      MAC filtering

    • Back up settings

    Basic settings and info l.jpg
    Basic Settings and Info

    • Run Install CD that comes with router

      • Basic info will be automatically entered or requested

    • To change info:

      • For Belkin the default IP address is

        • Other manufacturers use different ip addresses (later slide)

      • Enter this into address bar

      • Setup page will be displayed

    • Firmware - software that is embedded in a hardware device

      • Updated occasionally by manufactures

      • Check whenever you access router

    Account name l.jpg
    Account Name

    • Change name

      • Default name is set by manufacturer … eg, Belkin54

      • Bad guys know defaults and default administrative passwords

    • Create Administrative Password

      • Use Strong Password

    • Record your password where you can find it so you can make changes

    Default info l.jpg
    Default Info

    • Router default info is easily available on internet for consumers … and the bad guys

      • eg



    • So Change Name and Password

    Passwords l.jpg

    Your computer password is the foundation of your computer security

    • No Password = No Security

    • Old Passwords & Same Password = Reduced Security

    • Set and change the “administrator” password on router (and your computer logon)

    • STRONG PASSWORD … 6-8 digit passwords

      • use upper, lower case, numbers and symbols

    Wireless settings l.jpg
    Wireless Settings

    • SSID - service set identifier

      • name given to your wireless network

      • Broadcasting this ID makes network visible to PCs in area

        • can be turned off so it will not be detected by other PCs in area

        • Be sure to set up your own pc to automatically detect and logon to your WLAN

    • DMZ –

      • allows you to select a PC to access WLAN outside the firewall

      • do not enable unless firewall interferes with some activity

    • Ping Blocking –troubleshooting tool

      • Signal sent and echo received indicates valid ip address

      • Used by hackers to find active computers

      • Enable ping blocking … won’t send echo back

    Security blocking and filtering l.jpg
    SecurityBlocking and Filtering

    • Encryption – coding transmissions

      • Multiple variations. 2 most common:

    • WPA-PSK … Wireless Protected Access (Pre-shared key)

      • Use same password for all computers

      • Preferred Choice

    • WEP … Wired equivalent privacy

      • 64 or 128 bit encryption … doesn’t matter

      • Enter Password … converts to hex code

        • Must enter hex code

      • 2nd Choice (if WPA not supported)

    Mac filtering l.jpg
    MAC Filtering

    • MAC address … Media Access Control address

      • Unique ID permanently attached to each communication device by manufacturer – hardware id

      • Can find MAC address: run  cmd  ipconfig/all

    • Enter MAC addresses of acceptable network clients

      • If address is not on filter list, access to network will be denied

    • Very effective security method

    Recap steps to protect your wireless network l.jpg
    RECAPSteps to protect your wireless network

    • Change the default password on your router

    • 2. Enable WPA(PSK) or WEP on router and wireless workstation

    • Use MAC address filtering

    • SSID broadcast off

    • Prohibit Peer-to-peer (Ad Hoc) networking

    • 5. Keep current on hardware bios upgrades

    Print and file sharing overview l.jpg
    Print and File SharingOverview

    • Print and File Sharing:

      • Useful, but Risky if all computers are not secure

    • Setting up Network for Printer and File sharing

      • Interface card

        • Set Interface card to allow

      • Each computer in network

        • Make sure each computer is part of network

      • Printer

        • Make sure that Print sharing is allowed for printer

        • Load appropriate print drivers on each computer

      • Firewall Settings

        • Reset network IP range to trusted zone

      • Place files to share in “Shared Documents” folder

    Print and file sharing details 1 l.jpg
    Print and File SharingDetails (1)

    • Be sure WLAN is working and secure

    • Interface card

      • Start  connect to  NIC or WLAN card  properties

        • Check “File and Printer sharing on Microsoft Networks”

        • Repeat for all PCs on Network

    • Printer

      • Start  Printers and Faxes  shared printer

        • Select properties  sharing  check “share this Printer)

    Print and file sharing details 2 l.jpg
    Print and File SharingDetails (2)

    • Firewall

      • Be sure WLAN IPs are allowed in Firewall for all PCs

      • Zone Alarm

        •  Firewall  zones  add  IP range  <enter appropriate range>

    • Network ID for each computer

      • Under My Computer  Properties  Computer name

        • Click Change and add WLAN name as Workgroup

    • Shared Documents Folder for each computer

      • Any files in the Shared Documents folder will be accessible from all computers