Re: IP number question

From: Michael J. Pelletier (mjpelletier_at_mjpelletier.com)
Date: 01/27/05 

Date: Wed, 26 Jan 2005 17:54:38 -0800

manmar@h2009.com wrote:

> I recently came across a NG post that mentioned a friend of mine.
> Because of the subject of the post I checked the IP number of the
> posting. The IP number matches that of another individual I know but
> who would not make such postings and also hardly is ever on their
> computer. It is possible for one person to use another person's IP
> address to post to a newsgroup? How can this be possible?
> Any feedback would be appreciated with thanks.

Well, it depends. Does the other person have remote access to your friends
PC?

Also, if they are not on the same subnet, the other guy CAN NOT use his IP.
Remember IP 101. For this guy to forge your friends IP address, he must
have a route out and back for that IP address. If the other guy is not on
the same LAN, he does not have a route back....He can forge DOS type
attacks but can not forge a duplex communication. A duplex communication is
require to post to a news group.

So, what I am saying is this. If the other guy does not have remote access
capability and he is NOT on the same LAN that answer is no.

Michael

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