Strange Behaviour - IP Address changes in message

Discussion in 'Windows MSN Messenger' started by Ricci Hammond, Mar 3, 2006.

  1. For some strange reason Messenger is changing some ip addresses sent in a

    friend sends message ""

    I receive it as: "" !!!

    Anyone know why it is doing this?
    Ricci Hammond, Mar 3, 2006
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  2. is a internal ip. is a external ip.
    James O'Brien, Mar 3, 2006
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  3. Greetings Ricci,

    Some routers do this, especially if you've set them into the DMZ.
    Jonathan Kay [MVP], Mar 3, 2006
  4. Why would the router be changing text inside of the message ?
    Ricci Hammond, Mar 3, 2006
  5. That may be so, but some text that happens to be an ip address is sent in a
    message and it is getting changed by something.

    Nothing should be changing the text as far as I am concerned.
    Ricci Hammond, Mar 3, 2006
  6. All Messenger activity is simply text. It's doing search and replace on the packets.

    Take for example the old Messenger ALG (Application Layer Gateway) in the old Linksys routers
    circa 2001-2003. They'd switch every reference on port 1863 (the Messenger port) from an
    internal IP to what it thought was the external IP in an effort to allow file transfers and
    the like to work.

    Luckily this approach is outdated and been replaced with UPnP and networking tricks, but this
    stuff is still floating around.
    Jonathan Kay [MVP], Mar 3, 2006
  7. Thanks for the info.
    Ricci Hammond, Mar 3, 2006
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