Firewalls

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  • Jeff Mogul Paul Vixie Brian Reid Fred Avolio Brent Chapman
  • Regulations such as source, IP address and Protocol used Very basic
  • Firewalls

    1. 1. Firewalls By: Rachel and Merry
    2. 2. What is a Firewall <ul><li>Keeps destructive forces out of your network space </li></ul><ul><li>Filter </li></ul><ul><li>Same purpose as a fire barrier </li></ul>
    3. 4. History of Firewalls <ul><li>First firewall in 1980's </li></ul><ul><li>Became more popular in the late 1980's </li></ul><ul><li>Many people are associated with the creation of the firewall </li></ul>
    4. 5. Types of Firewalls Packet Filters <ul><li>The 1 st generation </li></ul><ul><li>Very basic </li></ul><ul><li>Follows certain regulations when filtering </li></ul><ul><li>If it meets the regulations the firewalls forwards it to the another network </li></ul>
    5. 6. Types of Firewalls Packet Filters
    6. 7. Types of Firewalls Circuit Level Gateway <ul><li>2 nd generation </li></ul><ul><li>Looks into another network to connect </li></ul><ul><li>Filters multiple packets </li></ul><ul><li>Hides your network </li></ul>
    7. 8. Types of Firewalls Circuit Level Gateway
    8. 9. Types of Firewalls Application Level Gateways <ul><li>3 rd generation </li></ul><ul><li>Can also be called Proxies </li></ul><ul><li>Follows specific rules when filtering </li></ul><ul><ul><li>Can stop traffic </li></ul></ul><ul><ul><li>Monitors the main system </li></ul></ul><ul><ul><li>Can sound alarms to notify the user </li></ul></ul>
    9. 10. Types of Firewalls Application Level Gateways PROS CONS One of the most secure firewalls Expensive Blocks on content, not just URL Affects network performance Difficult to set up
    10. 11. Types Of Firewalls Stateful Multilayer Inspection Firewall <ul><li>4 th generation </li></ul><ul><li>Combines all three generations </li></ul><ul><li>Packets must pass through three firewalls to enter network space </li></ul>
    11. 12. Types Of Firewalls Stateful Multilayer Inspection Firewall PROS CONS Most secure firewall Expensive Must be set up by professional

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