Re: obtai an IP of an MSN Messenger contact

[Octal <octetstream () gmail com>]

If you have control over a webserver, send the friend a link to an invalid
image on that webserver and tell them to click on it.  Once they've clicked
the link check your server logs for that invalid image and you should have
their IP address (unless they're using a proxy like mentioned before).  You
can also do this with an email if your "victim's" email client is configured
to automatically render images when an email is opened.  This technique has
been referred to as a "web bug".

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