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Re: [Snort-users] Logging Reassembled Packets

Subject: Re: [Snort-users] Logging Reassembled Packets
Date: Fri, 14 Mar 2008 18:26:26 +1100
Thank you all for your kind replies, I am overwhelmed.

It is bit disappointing that the reassembled sessions can not be logged by
Snort, afterall Snort CAN also work as a packet logger and log in pcap
format, then why is it that there is no option to log the re-built packets -
a functionality that Snort implements.
BTW, I just wanted to have a summary record of each session (initiated with
a 3WHS and terminated by a 4WHS) similar to the Snort's summary log packet
for portscans - I am not sure how tcpdump or other software mentioned in
this thread can do that. It looks like I will have to write one myself. In
addition I also wanted to track UDP and ICMP sessions - any ideas on how to
do that?

All this exercise to build a useful dataset for evaluating my little
supervised learning algorithm aimed at intrusion detection - Ah!!!

On Fri, Mar 14, 2008 at 5:15 PM, Will Metcalf <william.metcalf@gmail.com>
wrote:

If you have a couple of spare cpu's lying around you could always try
out gulp...

http://staff.washington.edu/corey/gulp/

Regards,

Will
 On Thu, Mar 13, 2008 at 11:07 PM, Jeremy <cjeremy@gmail.com> wrote:
Not trying to steal the thread here, but I have to ask since I have
 never really stress tested damonlogger. Do you all think it performs
 better than tcpdump at writing packets to disk?  This never crossed my
 mine to evaluate before now, as I have only used damonlogger to play
 traffic out another interface....  If yes, any document on this claim
 out there?  Running to Google now to see if I can't find something on
 this while I wait for responses ;)

 --jeremy



 On Thu, Mar 13, 2008 at 8:40 PM, Martin Roesch <roesch@sourcefire.com>
wrote:
 > -----BEGIN PGP SIGNED MESSAGE-----
 >  Hash: SHA1
 >
 >  Correction.  You should use Daemonlogger!
 >
 >  :)
 >
 >         -Marty
 >
 >
 >
 >  On Mar 13, 2008, at 8:20 PM, Jason wrote:
 >
 >  > snort is not intended to log full reassembled streams, it is
 >  > intended to
 >  > detect intrusion attempts and log the relevant data associated
with
 >  > those attempts. If you want full session logging you should use
 >  > tcpdump.
 >  >
 >  > Kamran Shafi wrote:
 >  >> I notice that there is a show_rebuilt_packets option in
steam5_global
 >  >> configuration, which I have turned on but don't know if it is
 >  >> producing
 >  >> anything. I run snort on some traffic collected on a
web/dns/mysql
 >  >> server
 >  >> using -r flag. The log shows that snort filters out the server's
 >  >> response
 >  >> and keeps only the inbound traffic - I am not sure if this
 >  >> behaviour is
 >  >> because of the stream 5 processor or else?
 >  >>
 >  >> On Fri, Mar 14, 2008 at 12:56 AM, Joel Esler <
joel.esler@sourcefire.com
 >  >> >
 >  >> wrote:
 >  >>
 >  >>> Again, a visit to the readme's in the doc/ directory should help
 >  >>> you.
 >  >>> Look up "log_flushed_streams" in the stream4 readme.
 >  >>> Joel
 >  >>>
 >  >>>   On Mar 13, 2008, at 2:36 AM, Kamran Shafi wrote:
 >  >>>
 >  >>>  Hi All,
 >  >>>
 >  >>> Is there a way to log the reassembled (TCP/UDP/ICMP) sessions in
 >  >>> Snort?
 >  >>>
 >  >>> --
 >  >>> Regards
 >  >>> Kam
 >  >>>
-------------------------------------------------------------------------
 >  >>> This SF.net email is sponsored by: Microsoft
 >  >>> Defy all challenges. Microsoft(R) Visual Studio 2008.
 >  >>>
 >  >>>
http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/_______________________________________________
 >  >>> 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
 >  >>> Snort-users list archive:
 >  >>> http://www.geocrawler.com/redir-sf.php3?list=snort-users
 >  >>>
 >  >>>
 >  >>>
 >  >>> --
 >  >>> Joel Esler ï joel.esler@sourcefire.com
 >  >>>
 >  >>>
 >  >>>
 >  >>>
 >  >>>
 >  >>
 >  >>
 >  >>
 >  >>
------------------------------------------------------------------------
 >  >>
 >  >>
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 >  >>
 >  >>
 >  >>
------------------------------------------------------------------------
 >  >>
 >  >> _______________________________________________
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 >  >> 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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 >  >
 >  >
-------------------------------------------------------------------------
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 >  > Defy all challenges. Microsoft(R) Visual Studio 2008.
 >  > http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/
 >  > _______________________________________________
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 >
 >  - --
 >  Martin Roesch - Founder/CTO, Sourcefire Inc. - +1-410-290-1616
 >  Sourcefire - Security for the Real World - http://www.sourcefire.com
 >  Snort: Open Source IDP - http://www.snort.org
 >
 >
 >  -----BEGIN PGP SIGNATURE-----
 >  Version: GnuPG v1.4.7 (Darwin)
 >
 >  iD8DBQFH2degqj0FAQQ3KOARAoGaAJ0Qunysz07riv/NwgSEyvkXuaKmvwCfRmjD
 >  9vfsXaAbtb93a6aPRD4QPso=
 >  =dxrz
 >  -----END PGP SIGNATURE-----
 >
 >
 >
 >
 -------------------------------------------------------------------------
 >  This SF.net email is sponsored by: Microsoft
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 >  Snort-users@lists.sourceforge.net
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 This SF.net email is sponsored by: Microsoft
 Defy all challenges. Microsoft(R) Visual Studio 2008.
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-------------------------------------------------------------------------
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-- 
Regards
Kamran Shafi
+61 41 824 9510
-------------------------------------------------------------------------
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