Re: All tcp ports open?

[StoneBeat <stonebeat () ya com>]

A few years ago i wrote a quick script that does something similar but doesn't  
need tcpdump, nemesis or any external tool to work. It had tcpdump and 
nemesis capabilities built-in

it accepts three parameters:
 -i (my own IP address)
-d (device, for example eth0)
-r (real open ports)

#./obfuscator-eth.pl -i 192.168.1.1 -d eth0 -r 21-20-6000

It appears to obfuscate Nmap Syn/Normal scan and fingerprint.

you can download here:
http://webs.ono.com/stonebeat/obfuscator-eth.pl.txt

El Lunes 30 Agosto 2004 23:00, sol seclists escribió:
> A script which does exactly what you desrcibe is mentioned in the book
> "hacking: the art of exploitation" by jon erickson only on a linux machine.
>
> the basic idea is something like:
>
> use tcpdump to monitor all incoming SYN packets not destined for any
> listening service and then use a packet generation tool (such as nemsis) to
> generate a packet with a seq#+1 and the SYN and ACK flags set.
>
> ----- Original Message -----
> From: "Ben Timby" <asp () webexc com>
> To: <pen-test () securityfocus com>
> Sent: Sunday, August 29, 2004 9:04 AM
> Subject: All tcp ports open?
>
> > I am not sure what is doing this, but I assume it is a software (or some
> > kind of) firewall/hids, can anybody point me in the right direction?
> >
> > I am pen-testing a Windows webserver, and a port scan reveals ALL tcp
> > ports open. hping also confirms that a SA is returned for any S packets
> > sent to any port I try. I can connect via netcat any of the ports, and
> > send data, but nothing is returned. In order to verify services, I am
> > required to connect and check for a banner or send appropriate protocol
> > commands to elicit a response.
> >
> > Has anyone seen this, or have any idea of what this is?
> >
> > Thanks.
> >
> > -------------------------------------------------------------------------
> > -
>
> ----
>
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> > -
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> -----
>
>
>
> ---------------------------------------------------------------------------
> --- Ethical Hacking at the InfoSec Institute. All of our class sizes are
> guaranteed to be 12 students or less to facilitate one-on-one interaction
> with one of our expert instructors. Check out our Advanced Hacking course,
> learn to write exploits and attack security infrastructure. Attend a course
> taught by an expert instructor with years of in-the-field pen testing
> experience in our state of the art hacking lab. Master the skills of an
> Ethical Hacker to better assess the security of your organization.
>
> http://www.infosecinstitute.com/courses/ethical_hacking_training.html
> ---------------------------------------------------------------------------
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------------------------------------------------------------------------------
Ethical Hacking at the InfoSec Institute. All of our class sizes are
guaranteed to be 12 students or less to facilitate one-on-one interaction
with one of our expert instructors. Check out our Advanced Hacking course,
learn to write exploits and attack security infrastructure. Attend a course
taught by an expert instructor with years of in-the-field pen testing
experience in our state of the art hacking lab. Master the skills of an
Ethical Hacker to better assess the security of your organization.

http://www.infosecinstitute.com/courses/ethical_hacking_training.html
-------------------------------------------------------------------------------