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Mcafee Firewall

Discussion in 'Virus & Other Malware Removal' started by KatieKat, Feb 4, 2003.

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  1. KatieKat

    KatieKat Guest Thread Starter

    How do I check if this firewall is set to make all the ports of my computer invisible?
     
  2. Yankee Rose

    Yankee Rose

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    Hi KatieKat;

    You can test the firwall by RIGHT clicking the red M on your taskbar, clicking "Personal Firewall" then clicking "Test Firewall".

    See if that helps! :)
     
  3. dvk01

    dvk01 Moderator Malware Specialist

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    Derek
  4. KatieKat

    KatieKat Guest Thread Starter

    It says it's unable to probe because I'm behind a proxy or nat.

    "We are unable to directly probe your computer, you should take comfort from this. You have that much more protection between your computer and the Internet."

    *edit* I went to pcflank.com and they said I had ports that needed to be closed, but when I went to all the other links above, they said everything was stealth. :confused:
     
  5. Dark Star

    Dark Star

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    KatieKat...

    Ports closed and "stealth" mean the same thing and that's a good thing because you're PC is invisible to others who might attempt breaking in. Blocked is the same as your computer being turned off.

    Your Ports are CLOSED so there's nothing that you need to worry about.

    "Open" indicates that your computer is actively listening and ready to accept incoming connection to that specific port. The presence of an open port is like having an open door to your house, and if that port is password protected then there is a guard at that "door". Guards can be tricked in to letting attackers inside.

    "Closed" indicates that there is nothing listening at a specific port, so even if an attacker connects to your computer there will not be any server waiting there to allow the connection. This is analogous to shutting the door to your house, and locking it to the outside. No one can get in, but anyone can open the door (port) from the inside. This means that a program on your computer could simply open a "closed" port with no restrictions from the operating system.

    "Blocked" ports are not only closed, but they are completely hidden (stealthed) to the world. This would be like shutting and locking your door, and then painting over it so no one can tell there is a door there. In general, not even programs on your computer can open the door if it is properly blocked.

    When you are browsing the web, the most important bit of information that your browser gives out is your IP address. This is a set of numbers that gets assigned to your computer whenever you are online. Often it is different (dynamic) every time you log on to the Internet... this is determined by your ISP.

    Some Internet Service Providers offer a service called Proxy or Transparent Proxy. This intercepts your requests for a web site and checks to see if a local ISP server has a cached copy of what you want. If it finds the website in it's cache, you will see the webpage very quickly, if not, their server will go out and get the webpage for you.

    The problem with this is that services such as ours will not see your IP address, but the IP address of the Proxy Server, so your computer will never be scanned.
    To check if you are using a proxy server in IE, click on "Tools - Internet Options" and then "Connections - LAN Settings" you should then uncheck everything under "Proxy Server".



    DS
     
  6. KatieKat

    KatieKat Guest Thread Starter

    Thank you for that info.

    But one more question...why does pcflank.com say I have open ports, when everywhere else said everything was stealth??
     
  7. Dark Star

    Dark Star

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  8. dvk01

    dvk01 Moderator Malware Specialist

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    I would tend to depend on blackcode slightly more than grc as they probe a lot more ports.

    AS an example last night I recommended someone to do a scan prioer to getting a firewall, she thought she wouldn't need one as she only goes online 2 hours a night and has a dial up.

    GRC and norton both found her to be OK with all ports closed, Blackcode, said all ports closed, BUT has 6 trojans on system, despite using norton av.

    as to pc flank, well, I have said in previous posts, IF it can't find me or my computer because my ISP use a transparent proxy server that it is not a reliable security checker and should not be relied on
     
  9. KatieKat

    KatieKat Guest Thread Starter

    :) I was wondering about pcflank. I'm glad that it's bull.
     
  10. Dark Star

    Dark Star

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    LOL .... That's right :D

    DS
     
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