Home Network Security – Your First Line of Defense Presentation BY: Laurie Kunkler Nate Hartmann Ferid ZNaIdia Taylan malak
Basic Overview & Objectives
What is a home network
What is a firewall
Why does it need a firewall
What does a firewall actually do
How does a firewall work
How to obtain a firewall/How to check if you currently have a fire wall
Hardware firewalls vs. software firewalls and antivirus software
What is a Home Network?
Two or more computers in the home that are interconnected for file sharing and/or Internet access.
The main advantage of a network is that multiple users can simultaneously interact with each other and share resources, for example the internet connection
After the home network is created, if using a wireless router many wireless devices such as laptops can connect to it.
Set up can be easy for those who are computer savvy - we will be explaining later on how simple it can be
You can also add devices to the network like a printer. This will allow anyone with access rights to be able to print a file on any of the computers connected to the network
Advantages and Disadvantages of Home Networks SOME ADVANTAGES SOME DISADVANTAGES
Equipment can add up and be costly
Set up can be challenging for those who are not computer savvy
If wireless on the router is not secured, anyone within range could be stealing the Internet connection and potentially result other outside users access to personal data. (we will discuss firewalls later in presentation)
What is a Firewall?
Secure internet gateway that is used in order to interconnect a private network to the internet.
A system designed to prevent unauthorized access to or from a private network.
Firewalls can be implemented in both hardware and software, or a combination of both.
Firewalls are frequently used to prevent unauthorized Internet users from accessing private networks connected to the Internet, especially intranets.
You Lock Your House Doors and Windows – Why Not Your Network
What does a firewall do?
It keeps harmful packets of data from entering or exiting your local area network (LAN)
Blocks humans or programs from entering your LAN
Administrators set guidelines or rules for what is allowed in or out
A firewall is an integral part of a home network security system but more is needed
If a user tells the system that certain data or applications are “OK” to pass through the firewall, it will not stop those information packets from entering
How does a firewall work?
A perfect firewall would allow no information to enter your network and no information to leave
Administrator must determine a set of guidelines for the firewall to follow – usually to start out, it is safe to disallow everything and then only allow those data transactions which are necessary and you know are safe
Firewalls are customizable using the following criteria:
IP address 126.96.36.199
Domain names www.GetAVirusHere.com
Protocols FTP, SMTP, UDP, etc.
Ports port 20 or port 21, echo 7, telnet 23
Specific keywords or phrases “X-rated” “Viagra”
How does a firewall work?
The firewall uses one or more of the following techniques:
packet filtering or static packet filtering
Checks the header of every packet of
information as it enters or exits the network
– only allows packets that are approved
proxy server or application layer firewall
stateful inspection or dynamic packet filtering
Monitors header and application level of each packet
Tracks accepted and denied packet in a table for finer sorting of data transfer or blockage
More involved and active filtering than static packet filtering
Internet Proxy Server
How to find my Firewall?
A firewall is a piece of software or hardware that sits between a private network and a public network.
A personal firewall is included with Windows XP/ VISTA/ Mac.
It will block inbound attacks but will not control network access to programs running on your computer.
It is a valuable security tool and should be enabled on most Windows XP/ VISTA/ Mac computers.
How to Find My Firewall continued
Windows Vista or Windows XP Service Pack 2
Click "Start," then "Control Panel.“
Click "Security Center.“
Click "Windows Firewall."
Mac Operating System
Click the Apple icon, then "System Preferences.“
Select "View," then "Sharing," then "Firewall.“
Select "Security" if you have Mac OS X 10.5 (Leopard),
Then click the "Firewall" tab.
Click "Start," then "Control Panel.“
Click "Network and Internet Connections,"
Then "Network Connections.“
Click the icon of the connection you wish to protect, such as Dial-Up or LAN or High Speed Internet.
On the left, under "Network Tasks,"
Click "Change settings of this connection“
Select "Internet Connection Firewall."
How Do I Enable Windows XP Internet Connection Firewall?
If you don't have an Advanced Tab :
right-click Local Area Connection again
Click Remove from Bridge .
Then go back to Properties and Advanced Tab .
Check the box labeled "Protect my computer and network by limiting or preventing access to this computer from the Internet".
To enable Firewall:
Click Control Panel .
Click Network and Internet Connections
Click the Network Connections Control Panel Icon
Right-click Local Area Connection and
Click the Advanced Tab
Do I have one already? How to Find My Firewall
Then click "All Programs.“
Search for the firewall program. (third-party firewall programs include McAfee, Symantec and Tiny Personal Firewall)
Find the third party software program
Select the program icon in the bottom right-hand corner of the computer screen.
Hardware firewall vs. Software firewalls
Provide level of protection to keep safe from hackers and other unwanted intrusions.
Software is far easier for computer novices to customize.
Some top software firewall packages include anti-spam, antivirus, even anti-popup ad software.
Some software firewalls include parental controls – websites children visit.
Some packages allow you to block photos and specific text content .
The features are suited to smaller home networks.
A small metal box filled with plug openings, or ports.
You hook the computer network into the box then set it up on your computer.
Hardware firewalls are typically found in broadband routers.
A hardware firewall is less vulnerable than a software firewall.
Hardware firewalls are best suited to businesses and large networks .
WHICH FIREWALL TO BUY?
Third-Party Personal Software
-Block incoming and outgoing threats
. computer might have outgoing threats when its infected by viruses, Trojans, or spyware
-Distinguish between threats and legitimate software
. include a list of safe software for the firewall to check
. malware to block it
. issue a pop up alert for the user asking for advice on what to do
Recommended personal firewalls with links to vendors:
Checkpoint ZoneAlarm Firewall
PC Tools Firewall Plus
Comodo Firewall Pro
Agnitum Outpost Firewall Pro
- Include two or more security features:
. Personal Firewall
Recommended Internet security (IS) suites with links to vendors:
Norton Internet Security 2011 Norton 360 V 5.0
Kaspersky IS 2011
BitDefender IS 2011
Webroot IS Complete
Internet Security Software Suites
-Based on “NAT” which hides your computer from the internet
. “NAT” Plus can be purchased for more protection
-Three basic types of hardware devices:
. Wired Routers
. Wireless Routers
. Broadband Gateways
Recommended hardware firewall products with links to vendors:
D-Link 655 Xtreme N Wireless Router with QoS and Gigabit Ports