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Re: snort DCE/RPC reassemble_threshold
From: "Lawrence R. Hughes, Sr." <lhughes () safemedia com>
Date: Tue, 21 Dec 2010 12:24:21 -0500

Ryan,

Thanks, I did find the README.DECRPC2 after I sent the message.
My question is why if DCE/RPC was depreciated in snort 2.8.6.1
The README.DECRPC has a version for 2.8.6.1 listed here:
http://cvs.snort.org/viewcvs.cgi/snort/doc/Attic/README.dcerpc?logsort=date&search=None&hideattic=1&sortby=file&hidecvsroot=1&diff_format=h

Thanks,
Larry

----- Original Message ----- 
From: "Ryan Jordan" <ryan.jordan () sourcefire com>
To: "Lawrence R. Hughes, Sr." <lhughes () safemedia com>
Cc: <snort-users () lists sourceforge net>
Sent: Tuesday, December 21, 2010 12:14 PM
Subject: Re: [Snort-users] snort DCE/RPC reassemble_threshold


Hi Larry,

The README.dcerpc that you linked was tied to the old dcerpc
preprocessor, which we removed in Snort 2.9.0. We replaced it with
dcerpc2 a couple years ago, whose README you can find here:
http://cvs.snort.org/viewcvs.cgi/snort/doc/README.dcerpc2

From the README:
    reassemble_threshold
        Specifies a minimum number of bytes in the DCE/RPC desegmentation 
and
        defragmentation buffers before creating a reassembly packet to send 
to
        the detection engine. This option is useful in inline mode so as to
        potentially catch an exploit early before full defragmentation is 
done.
        A value of 0 supplied as an argument to this option will, in effect,
        disable this option.  Default is disabled.

-Ryan

On Tue, Dec 21, 2010 at 12:04 PM, Lawrence R. Hughes, Sr.
<lhughes () safemedia com> wrote:
Hi,

The default snort.conf file has:

preprocessor dcerpc2: reassemble_threshold

yet when looking at the snort manul reassemble_threshold is never 
mentioned
also the README.dcerpc does not mention it.

What is it and what does it do?

Thanks,
Larry

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------------------------------------------------------------------------------
Forrester recently released a report on the Return on Investment (ROI) of
Google Apps. They found a 300% ROI, 38%-56% cost savings, and break-even
within 7 months.  Over 3 million businesses have gone Google with Google Apps:
an online email calendar, and document program that's accessible from your 
browser. Read the Forrester report: http://p.sf.net/sfu/googleapps-sfnew
_______________________________________________
Snort-users mailing list
Snort-users () lists sourceforge net
Go to this URL to change user options or unsubscribe:
https://lists.sourceforge.net/lists/listinfo/snort-users
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