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What is the IP of a contact talking via MSN/AIM/YAHOO? What is there computer name

I'd be interested to know how I can find out the IP address of a contact via msn/aim/yahoo?
How can I pick it up?

And is there a way to find out the computer name of the person speaking to you?


And before you go calling hacker etc, I'm doing this for a little education as im interested in network security. If I wanted to "hack" someone, I wouldnt need to ask. (As far as im aware this is within in the rules but if not rather post politly why it isn't) :-)
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georgecooldude
Asked:
georgecooldude
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2 Solutions
 
nihlcatCommented:
If you already know how to "hack" then you wouldn't be asking.  =)

Look into port filtering at the workstation and the proxy, firewalling voodoo, or set up dummy routes for outbound connections.

Better yet, employ a GP that does not allow the installation of chat clients (I do).  This is, of course, is beside the point since you can just go to some websites and use their integrated chats.

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georgecooldudeAuthor Commented:
I was hoping someone could run through it with me.
I've done enough googleing. :)
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amirinamdarCommented:
You need a packet sniffer like ethereal and then need to do a whois. Look at the answer here:
http://www.experts-exchange.com/Miscellaneous/New_Net_Users/Q_21175286.html
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Paul SCommented:
on an xp machine do this

get your buddy to send you a file (music, pictures, anything) or send them a file. While the transfer is going do this:

Start Menu > Run > "netstat"

or

Start Menu > Run > "netstat -n"

this will give you the ip addresses of anyone you are connected too.

then if you really want to see how much you can find out from an ip address use this program:
http://www.nirsoft.net/utils/ipnetinfo.html

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anil_uCommented:
Once you have the ip address using netstat

use ping -a IP
to resolve the hostname
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georgecooldudeAuthor Commented:
I like a way to find out without having to send them a file. Is there a way?
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Paul SCommented:
yeah packet sniffer like the other posts said.

the way i see it you have 2 options:

1) use packet sniffer and have to go through lots of data

2) use netstat, much faster, but requires a file to be transfered.
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Paul SCommented:
i just tryed a packet sniffer. the one i used could tell me the netbios name of the other persons computer, but not their ip address.
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anil_uCommented:
The packet sniffer to use is snort or ethereal
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georgecooldudeAuthor Commented:
With a packet sniffer like ethereal what do the packets look like?

Are they in some sort of binary format, or will it just tell me what each packet is?

Could you explain how it will present a packet to me.

How long would it take using a packet sniffer to determine their computername/and or IP? 1min 5min 1hour?

Would I be able to do it live on the fly? Or would I need to record each packet for later analyse.

And the netstat is good, but it won't allow me to monitor my network remoetely. Also the netstat thing doesn't work with yahoo, I think they fixed it.
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Paul SCommented:
here is the packet sniffer i tryed

http://www.nirsoft.net/utils/smsniff.html

i found the computer name of the peron i was talking to (msn) in only a few minutes.

please clarify your question. Are you trying to find an ip address or are you trying to remotly manage a network?
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georgecooldudeAuthor Commented:
>>Are you trying to find an ip address or are you trying to remotly manage a network

I need the skills to be transferrable for me playing around at home and then doing it seriously at work.

Once I have the IP of a msn client and computer name that is all I need for now. I'm not trying to take over networks remotely.
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georgecooldudeAuthor Commented:
I just had a look at SMsniff. It looks quite good and I found it easyier than ethereal first time. Both look good though.

I had bittorrent and various programs running did a short capture and it had a load of computer jargon which must have been a part of what i was downloading.

In this format though its impossible to read. Is there anyway to decode it?
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georgecooldudeAuthor Commented:
I just had a look at SMSnifer again. Its good. I like it.

Is there a way to tell of the computer name aswell from it? I monitors some coversations for along time but didnt see anything about the computer name
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Paul SCommented:
i think i may have made a mistake, sorry. I am on a LAN. My test person was talking to me through MSN from the same LAN. i got the computer name from a LAN packet, not a MSN packet. Sorry. Have you seen the aim spy program that sends a link that gives you the persons ip address when they click on the link?
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georgecooldudeAuthor Commented:
no, ive not seen aimspy. But I really need a program to work as a monitor without the use of sending ppl files.

smsnifer seems good. I just need to know computernames now if it is possible
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Paul SCommented:
check this out:
http://www.effetech.com/
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