From: David M. Zendzian (dmz@dmzs.com)
Date: Mon Aug 30 2004 - 12:00:58 EDT
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
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