Ben,
Do you get any header responses or anything when you connect that could be
used to help identify what is allowing all port connects? Do you get iis on 80,
and exchange on 25?
It could be a honeypot redirect on all ports other than specific, ie 80/443,
by the firewall or load balancer in front of machine.
Do all ports return tcp counters and other such info that makes it look like
all responses are coming back from same end destination host?
Do you have access to environment? Can you trace traffic internally?
Good luck
David
-----Original Message-----
From: "Massimo Cetra" <mcetra@navynet.it>
Date: Sun, 29 Aug 2004 16:10:08
To:"'Ben Timby'" <asp@webexc.com>, <pen-test@securityfocus.com>
Subject: RE: 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?
http://www.iptables.org/patch-o-matic/pom-extra.html#pom-extra-TARPIT
This is for Linux but may help you finding more informations.
Max
------------------------------------------------------------------------------
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
-------------------------------------------------------------------------------
/--------------------------------------\
David M. Zendzian * dmz@dmzs.com
(415) 867-7812 - phone
-------------
Imagination is greater than knowledge * Albert Einstein
Every day is a good day, whether you like it or not! *
------------------------------------------------------------------------------
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
-------------------------------------------------------------------------------
