Transcript Firewall
Brooke Thorpe COSC 101-Section 7 Overview What is a Firewall? • System designed to prevent unauthorized access to or from a private network • Will check messages entering and leaving and block those that do not meet the specified security criteria • Considered the first line of defense in protecting private information • Can be Hardware or Software Common Misconceptions of Firewalls Firewall Techniques • Packet Filter • Accepts or rejects packets based on the rules defined by the user • Application Gateway • Security to specific applications • Circuit-level Gateway • Applies security mechanisms when a TCP connection is established • Proxy Server • Intercepts messages entering and leaving the network Hardware Firewalls • Can be a stand-alone product • • • • but typically found in broadband routers Use packet filtering Protects the system from the outside Pros: easy to set up, protect every machine on the local network Cons: treats any kind of traffic from the local network to the internet as safe Software Firewalls • Installed on your computer • Can block or allow a program’s ability to send and receive data • Pros: knows what program is trying to access the internet and if it is malicious or not • Cons: only protect the machine installed on Common Firewall Systems • Cisco • Work with high end and large enterprise systems • Very expensive • NetGear • Low end hardware security (not recommended) • Hotbrick • Good firewall system for reasonable price • Home offices • SonicWall • Good firewall • Medium to large scale company use Conclusion • A firewall is one way you can keep your computer and its contents safe but should not be your only line of defense • Firewalls can be hardware or software but often work best together • Firewalls use many different types of techniques to keep information safe • Installing a firewall is easy and it is also easy to obtain Bibliography • "The Differences and Features of Hardware & Software Firewalls - Webopedia.com." Webopedia: Online Computer Dictionary for Computer and Internet Terms and Definitions. Web. 01 Dec. 2011. <http://www.webopedia.com/DidYouKnow/Hardware _Software/2004/firewall_types.asp>. • "Firewall Brands." Ethical Hacking for Beginners. Web. 01 Dec. 2011. <http://www.computersecurity.cc/firewallbrands.html>. • "Firewall Debate: Hardware vs. Software." The Online Tech Resource for Small Business Owners and Managers - Small Business Computing. Web. 01 Dec. 2011. <http://www.smallbusinesscomputing.com/webmaster/article.php/3103431/Firewall-DebateHardware-vs-Software.htm>. • "Firewall Myths Exposed - Keep Your System and Firewall Secure With the Truth." Find Science & Technology Articles, Education Lesson Plans, Tech Tips, Computer Hardware & Software Reviews, News and More at Bright Hub. Web. 01 Dec. 2011. <http://www.brighthub.com/computing/enterprise-security/articles/8257.aspx>. • "How to Use the Windows Firewall - YouTube." YouTube - Broadcast Yourself. Web. 05 Dec. 2011. <http://www.youtube.com/watch?v=RDGQY8wv9EY>. • "What Is Firewall? - A Word Definition From the Webopedia Computer Dictionary." Webopedia: Online Computer Dictionary for Computer and Internet Terms and Definitions. Web. 01 Dec. 2011. <http://www.webopedia.com/TERM/F/firewall.html>.