Date: Fri, 12 Nov 1999 07:53:22 -0600 (CST) From: Don Read <dread@calcasieu.com> To: os2_daemon@altavista.net Cc: freebsd-questions@FreeBSD.ORG Subject: RE: FreeBSD security on TCP/IP question. Message-ID: <XFMail.991112075322.dread@calcasieu.com> In-Reply-To: <9911120731257C.11943@weba4.iname.net>
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On 12-Nov-99 os2_daemon@altavista.net wrote:
> Hello,
> I've just ran into trouble for mucking around with ifconfig and conflicting
> IP addresses. I'm just an ordinary user without any deep TCP/IP knowledge.
ah... mucking about.
... and not even your network.
>
> It all started when curiously, I tried to put 172.16.1.1 which is an NT
> server into ifconfig. Ifconfig said some error messages that the IP address
> have been taken by another machine. Who cares ...
>
just the rest of the 172.16 network.
> Next day, the sysadmin came to me and accusing me for trying to hijack the
> system. He told me that apparently I crashed his NT by doing so. This brought
> me a very big question. Was he just bluffing, or the NT seriously cannot
> defend against this ?
I've never seen NT fall-over from this; it's lame, but not that fscking lame.
usually it stopps accepting or sending packets for various intervals and give a
whinging dialog.
> Could please anyone explain what had happened in detail?
http://oac3.hsc.uth.tmc.edu/staff/snewton/tcp-tutorial/
> I've heard of something called "IP spoofing", is this one of them ?
different kind of spoof.
> I also wonder what will happen to a FreeBSD box if some other computer claim
> the same IP address.
pretty much the same, stop accepting or transmitting packets, and complain
loudly.
--
Don (unplug 'em) Read dread@calcasieu.com
EDP Manager dread@texas.net
Calcasieu Lumber Co. Austin TX
-- For the same reason you don't give handguns to children.
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