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Revision as of 21:19, 11 September 2007

Windows Firewall comes with Windows XP and Vista. Firewalls determine which programs can connect to the outside world and what kinds of connections they can make. If Windows Firewall doesn't permit Firefox to make connections, Firefox will give an "Server not found" error when you try to browse to web sites.

To see if you're running Windows Firewall:

  1. Open the Windows Control Panel.
    • __(Windows Vista)__ Click the Windows icon and choose {PATH()}Control Panel{PATH}.
    • __(Windows XP)__ Open the Windows Start Menu, then choose {PATH()}Control Panel{PATH}. Your Start Menu may have the {PATH()}Control Panel{PATH} as an item under {PATH()}Settings{PATH}.
  1. Open the Windows Security Center.
    • __(Windows Vista)__ Under the {DIV(class=button,type=>span)}Security{DIV} header, click {DIV(class=button,type=>span)}Check this computer's security status{DIV}
  1. Click the Firewall header. It will expand. Look for the text "Windows Firewall is actively protecting your computer". If you see it, you are using Windows Firewall.

If you're using Windows Firewall, ensure that Windows Firewall is properly configured.

  1. Starting from the Windows Security Center, open the Windows Firewall settings dialog.
    • __(Windows Vista)__ Click on {DIV(class=button,type=>span)}Windows Firewall{DIV} in the upper left. Then click on {DIV(class=button,type=>span)}Change settings{DIV}. You may receive a User Account Control pop-up. Click {DIV(class=button,type=>span)}Continue{DIV}.
  1. On the {PATH()}General{PATH} tab, the checkbox before {DIV(class=button,type=>span)}Block all incoming connections{DIV} should be unchecked.
  2. Click on the {PATH()}Exceptions{PATH} tab.
  3. If "Mozilla Firefox" is listed, click on it and then click on the {DIV(class=button,type=>span)}Delete{DIV} button.
  4. In the Delete a Program dialog that comes up, click {DIV(class=button,type=>span)}Yes{DIV}.
  5. Still on the {PATH()}Exceptions{PATH} tab, make sure the checkbox for {DIV(class=button,type=>span)}Notify me when Windows Firewall blocks a new program{DIV} near the bottom is checked.
  6. Press OK. Now that Windows Firewall is properly configured, try running Firefox. You may receive a Windows Security Alert dialog asking if you want to block Firefox. Choose {DIV(class=button,type=>span)}Unblock{DIV}.