Firewalls - Texas Tech University

Firewalls - Texas Tech University

Firewalls Cliff Leach Mike Looney Danny Mar Monty Maughon What is a firewall and what do we use it for?

Firewalls serve as a barrier between your personal computer and the outside network (E.G. Internet) Helps regulate network flow Features of Firewalls Caching Address Translation

Content Restriction Technical Aspects

Advanced Authentication Policy Packet Filtering Application Gateways How does a firewall work? Exchanging individual packets of data

Destination address and port number Basic Firewall Diagram Goncalves, Firewalls: a Complete Guide, p.255 When do you need a firewall?

Computers files accessed remotely Operating an Internet Server Remote Access Program

Prevention of intrusion Trojan horses What is your goal for security measures?

Limit users to specific network access Regulate incoming and outgoing traffic Monitor traffic on TCP ports Keep confidential data safe What kind of firewalls are there? Software and hardware based firewalls

Hardware networking devices Content filters (E.G., Net Nanny, Bess) Disadvantages of Firewalls Access Restrictions Modem Access - Back-door challenges Inside Attacks

Firewall Packages McAfee Personal Firewall

Zone Alarm Tiny Personal Firewall v.2 Sygate Personal Firewall Pro 5.0 BlackIce Defender

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