a red stop sign after closing browser?

Discussion in 'Mac Basics and Help' started by Deborah0702, Mar 31, 2009.

  1. Deborah0702 macrumors newbie

    Nov 8, 2008
    I get this in a box on my desktop, it is a recent development. In the box, with the red octagonal shape with an exclamation point it says:

    IP Configuration in use by 00:23:32:58:d5:ea DHCP Server

    This happens when I close something. I noticed it when I closed Firefox today. What is this?
    Can anyone help?
    It does not always happen.
  2. smurfjammer macrumors 6502a


    Jun 7, 2004
    Auckland, New Zealand
    Do you have block pop-up windows turned on in Firefox?
  3. mcavjame macrumors 65816


    Mar 10, 2008
    phased to this universe
    It depends on how long your router is set to lease out an IP address. If you are assigned an IP from the router, then put the machine to sleep, the lease may expire while it is asleep. When you wake the machine, it will try to use the existing IP and may notice that it has been assigned to another user. You can release the IP.

    This is only a possibility based on what you have provided.
  4. Deborah0702 thread starter macrumors newbie

    Nov 8, 2008
    I do have flashblock turned on in Firefox

    Thank you for the quick responses. Regarding the second response; it sounds to me that this is not a security risk. Is this true?
  5. ravenvii macrumors 604


    Mar 17, 2004
    Melenkurion Skyweir
    Sorry, but you've been infected with the Conficker worm.

    Have fun with that. Hey, it's April 1st in many parts of the world!

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