How does a firewall work!?!

Discussion in 'Online Security' started by lsakhvoruk, Feb 9, 2001.

  1. lsakhvoruk

    lsakhvoruk

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    Jan 2, 2000
    Messages:
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    I just would like to know how does a firewall work and what is it used for. Thanks to all and any that reply. Leo.
     
  2. mairving

    mairving

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    Jul 10, 1999
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    Location:
    Arlington, TN
    In a builing, a firewall would be put up to prevent the spread of fire from building to building. It is a similar thing for a computer firewall. Basically it is a way to prevent your network from burning up. You can have either a hardware based or software based fireballs or you can use both. Two basic purposes:
    <OL>
    <LI> To limit what people externally not on your network can access on your system. You can be very broad or very narrow. In other words, if you had a webserver, <B>everyone</b> would have access to your site. But you wouldn't want everyone to have access to your server config files.
    <LI> The second purpose is to limit what users internally can do on your network. It helps to keep some of the nasties out.
    </OL>
    Here are a couple of firewall sites that will explain in detail what firewalls are:
    http://grc.com/su-firewalls.htm
    http://www.interhack.net/pubs/fwfaq/
     
  3. Floppyman

    Floppyman Administrator Staff Member

    Joined:
    Mar 10, 1999
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    If you're interested in aquiring a firewall check out Zonealarm at http://www.zonealarm.com I've been using it for quite sometime even though I'm on a dial up, and it has worked great and best of all--FREE.

    Norton and BlackICE make some as well, but you're gonna have to pay for those.
     
  4. bob

    bob

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    Mar 9, 1999
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    Location:
    LA, CA
    A firewall is a network level software that can be run on your pc, a router, or a special firewall router.

    It blocks access from the internet (or a hostile connected network). It usually is configured to allow most access from your network to the internet while blocking access from the internet.
     

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