From: Francois Labreque (flabreq@ca.ibm.com)
Date: Mon Jul 31 2006 - 10:49:00 EDT
"itsec.info" <itsec.info@gmail.com> a écrit sur 2006-07-30 13:19:22 :
> Hi
>
> The background for the following questions is purely due to feasibiltiy
> reasons for pentests and there is no interest in hacking.
>
> I have read many articles about sniffing, spoofing and relaying.
> So far I learned that it is possible to connect a host, hostA, between
two
> existing hosts, host1 and host2, in order to sniff e.g. plaintext
protcols
> like telnet, pop3, and ftp.
>
> 1)
> Is this only in a local network possible or also in the Internet?
The packets have to pass through your PC for them to be read, so you have
to be in the path taken to go from the sender to the recipient. The
easiest way to do that is to be on the same segment as the sender or the
receiver, or on a segment where you know that the packets will go through,
such as the backbone of a corporate network, or ISP.
>
> 2)
> I would lik to test such a scenario in my private local network in order
to
> prove myself and my team, that this is really possible.
>
> Can anybody provide me a kind of how-to for this scenario.
> I run different linux machines on my local network and on hostA I
> have various
> tools installed like dsniff, hunt, fakerout, P.A.T.H, wireshark, etc.
>
Any packet collection/analysis tool will allow you to do that. You might
have to be able to modify the network switches' configs to be able to
monitor packets from your PC.
Be careful, though. Doing so without management approval could have
consequences.
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