How to Setup and Secure Your Network

1
How to Setup and Secure Your Network

• Marcelino NogueiroEmail mnogueiro_at_ggcs.Org

2
Introduction

• Who has high speed Internet?
• How many have DSL?
• How many have cable?
• How about dialup?
• How many already have a router?

3
Agenda

• Network terminology
• Wired and wireless networks
• Selecting components for your network
• Optional components to get the most out of your
  network
• Demo Setup and Security
• QA

4
Network Vocabulary

• IP - Internet Protocol is the language used by
  computers to talk to each other over a network
• TCP/IP - Transmission Control Protocol controls
  the data streams that are transmitted over the
  Internet Protocol
• Static IP address an IP address that does not
  change
• Dynamic IP address an address that changes or
  is re-assigned by a DHCP server
• DHCP - Dynamic Host Configuration Protocol - an
  agreed upon protocol to automatically assign IP
  address information to devices. DHCP servers
  provides the address information for DHCP clients
  (i.e. Computers)

5
Network Vocabulary

• Router - A device used to route network traffic
• LAN - Local Area Network
• WAN - Wide Area Network
• Wi-Fi - Wireless, 802.11- is the IEEE
  specification number, followed by the letter
  revisions a, b, g, n
• WEP - Wired Equivalent Privacy or Wireless
  Encryption Protocol
• WPA - Wireless Protected Access

6
IP Address Ranges

• Private IP Addresses
• 10.0.0.0 10.255.255.255
• 172.16.0.0 172.31.255.255
• 192.168.0.0 192.168.255.255
• No DHCP Server found
• 169.254.1.0
• Loopback
• 127.0.0.1

7
Network components

• Start with a Router
• There are several router manufacturers. Linksys,
  D-Link, Netgear, Belkin
• Linksys Router Emulators
• D-Link Router Emulators

8
Sample Network 1
9
Wired or Wireless

• Currently wired is still more reliable but
  wireless adds convenience!
• Are wired networks secure?
• Are wireless networks secure? Only if you secure
  them!
• Why secure your network?

10
Which Wireless?

• What are all those numbers and letters?
• 802.11a and b Early versions (2000) of the
  wireless standard. Very few ver. a system
  deployed. Ver. b was very popular and offered
  good range and max speed of 11Mbits/s
• 802.11g Released in 2003, basically the same as
  b but higher speed of 54Mbits/s. Range about
  100ft. indoors if you are lucky!
• 802.11n Expected release date Oct. 2008. Has
  been available for over a year! Rated at max
  speed of 248Mbits/s. Indoor range approx. 250ft.!

11
Sample Network 2
12
More goodies for your network

• Print Servers Linksys - D-Link
• Network Storage D-Link - Nexstar
• Multimedia Centers D-Link
• Telephones (Voice over IP VoIP)Viatalk
  Vonage
• Network Cameras DCS3220

13
Sample Network 3
14
Demo

• Now for the demo!

15
Questions ????