Re: Possible New Security Tool For FreeBSD, Need Your Help.
From: Jon O . (jono@microshaft.org)
Date: 08/31/01
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Date: Fri, 31 Aug 2001 12:39:45 -0700 From: "Jon O ." <jono@microshaft.org> To: Not Going to Tell You <luckywolf19@hotmail.com>
I already have this ported to FreeBSD. It uses libpcap to watch for
syn packets.
The original is called cd00r.c and is available here:
http://www.phenoelit.de/fr/tools.html
My FreeBSD port is available if you send an email, I've got to dig it up...
On 31-Aug-2001, Not Going to Tell You wrote:
> Sorry for the blank e-mail.
>
> I have an idea, maybe you either know if it is already been done or you can
> help me write this software:
>
> What if I would scan 5 ports in a defined order, within a define period of
> time on my remote box. A program on the box would recognize these 5 port
> scans as a "Key" from a remote user to open a port or to activate another
> software.
>
> Why would this be good?
> I could close all the ports on my box except those needed to provide a
> service (i.e. port 80), however, how can I remote manage it? So then I would
> have to open a sshd port also. But this leads to a potential security
> problem when scanned by a hacker. So, what if I had a program that sent a
> type of "Key" to the box and the box recognized that the key sequence order
> was from me, then opened the sshd port. After I was finished with the sshd
> session, I would run another program to close the port behind me?
>
> Any thoughts and help is welcomed.
>
> Lucky
>
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