Some times ago, I get an friends ip doing what genix1314 posts. We were chating in msn, and I had got the apache web server running on my pc, with some pages i was making... so I pass an url (i had got virtual hosts), to my friend, he access my web, and then his ip was in the logs of apache in /var/log/httpd/access-log (in my trustix server).
That kind of hacking, obtaining ip in this way, is a social hacking. Its very useful.
If you haven't got an apache web server, You could try another client-server service in your pc, and if it not write logs, you could sniff your connection. Remember that may be the client connected to your ip is connected throw a proxy or a gateway, and the ip you get is the proxy one.
Well, try something, and tell here your results!
bye bye
pd: Sorry my English, I speak Spanish (I'm from Argentina).
