From: Ivan Arce (ivan.arce@coresecurity.com)
Date: Fri Feb 01 2008 - 20:12:32 EST
Hello
Sorry for the delay replying to this. Core Force does packet normalization
and defragmentation of IP packets. However this behavior is not user
controllable (it is in the kernel driver but you cant control it from the
configuration GUI)
-ivan
Danny Fullerton wrote:
> Hi,
>
> Core Force those not implement packet normalization (scrub) of OpenBSD's
> pf if I recall. I don't known if they messed up with the stack signature
> in some other way.
>
> Ivan Arce, could you ratify?
>
> Otherwise..., almost any good firewall appliance should do the trick.
>
> We use redundant OpenBSD's systems for this kind of purpose in a
> production environment (highly critical 24/7/365). The firewall (pf) is
> extremely powerful (enterprise level), easy to understand and cost
> effective. Take a look at pfsync and CARP. One big advantage over PIX or
> alike is the fact that your actually dealing with a complete operating
> system: if you need to implement some other *twisted* security feature,
> the door is wide open without having too invest in some kind of upgrade.
>
> regards,
>
> ---
> Danny Fullerton
> IT Security Specialist, GCIH GHTQ
> Mantor Organization
>
> Ivan Arce wrote:
>> OpenBSD's PF has been ported to Windows (pre-Vista) as part of a free
>> firewall/endpoint security software. It is part of research work and
>> in beta state (regular YMMV disclaimer) but I know it has been
>> installed used on production servers for quite some time. The port of
>> OpenBSD's PF provides a fully-featured and stable bidirectional
>> statefull firewall that some found useful to have on windows systems.
>>
>> http://force.coresecurity.com
>>
>> -ivan
>>
>>
>> Arafat M. Bique wrote:
>>> For Windows System and IIS is not quite easily to do that. I don't know
>>> if someone has a solution that isn't reverse proxy.
>>>
>>> Regards,
>>>
>>> Arafat M. Bique
>>> Network Infrastructure
>>> IT Department
>>> email:arafat.bique@bcifomento.co.mz
>>> Web:http://www.bcifomento.co.mz
>>>
>>> -----Original Message-----
>>> From: listbounce@securityfocus.com [mailto:listbounce@securityfocus.com]
>>> On Behalf Of John Brazel
>>> Sent: Wednesday, September 05, 2007 10:01 AM
>>> To: Attari Attari
>>> Cc: pen-test@securityfocus.com
>>> Subject: Re: Block OS Detection
>>>
>>> OpenBSD's pf firewall has a 'scrub' option that allows normalisation
>>> of various TCP header fields, as well as fragment re-assembly and the
>>> like.
>>>
>>> J.
>>>
>>> On 8/31/07, Attari Attari <c70n3@yahoo.co.in> wrote:
>>>> Hello All:
>>>>
>>>> Is there a PRACTICAL solution from PRODUCTION
>>>> environments that can be used to block OS detection
>>>> from tools like NMAP? I googled and read some notes
>>>> but couldn't find a real world solution to blocking
>>>> Windows & Linux OS detection.
>>>>
>>>> I'm quite sure I'll get the right inputs here.
>>>>
>>>> Thank you.
>>>>
>>>> Attari
>>>>
>>>>
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>
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-- "Buy the ticket, take the ride" -HST Ivan Arce CTO CORE SECURITY TECHNOLOGIES http://www.coresecurity.com PGP Fingerprint: C7A8 ED85 8D7B 9ADC 6836 B25D 207B E78E 2AD1 F65A ------------------------------------------------------------------------ This list is sponsored by: Cenzic Need to secure your web apps NOW? Cenzic finds more, "real" vulnerabilities fast. Click to try it, buy it or download a solution FREE today! http://www.cenzic.com/downloads ------------------------------------------------------------------------
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