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Pascal_La_Dalle

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Man in the middle

hey everyone,
                            i want to know more about man in the middle attack. And for that i want to try (no worry, its only for educatinnal purposes). What i want do is the following. I'll start a chat program (written in Java) on the of my cpu at home. What i want to do is to intercept one message (ex : cpu1 sends hello to cpu2 via the chat program) and to change the content of the message so that cpu2 receive the message "bye" for example.

I've read a bit on this and i think all of this is called tcp hijacking but i can't find the right tool to do what i want to do.

Thanks for suggestion and help

have a nice day
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mdoland

Depends on what OS you have. I have seen an old program called Juggernaut do it. Think its Linux. Pretty cool, but I think there are many alternatives.
Try:
http://www.google.com.au/search?q=packet+sniffing
I think thats what you want.
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ASKER

tx for your answers

1) on linux (fedora 3) or windows ...... it doesnt matter). I tried to install juggernaut but i`m having a hard time doing it.

2) tx for the link, i'll check the tools

3) paquet sniffing only allow me to see the traffic that is going by. I use a lot Ethereal, but that's not really what i want to do. I want to intercept the paquets and modify the data in it.

Again, tx for your answers

have a nice day
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ahoffmann
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nader alkahtani
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seems to be a nice tools ... tx for the tip.

But just one thing ... with the tool can i change the data of the packets i intercept, cause in the end, thats what i need to do

tx a lot
If you meant that may cause problems then read FAQ for that tool
> .. with the tool can i change the data of the packets i intercept,
I doubt it does what you asked for