Couple things...

Tue Aug 6 19:28:48 EDT 2013

I don't know what to tell you.  If you want me to run that trace tool and send you the output, let me know where to get it and I'll figure it out.

Did you take a look at the pcap file to see if there were a lot of missing SYN/SYNACK packets?

Thanks.

Craig

From: Carter Bullard [mailto:carter at qosient.com]
Sent: Tuesday, August 06, 2013 10:02 AM
To: Craig Merchant
Cc: Argus (argus-info at lists.andrew.cmu.edu)
Subject: Re: [ARGUS] Couple things...

Hey Craig,
I'm not having any problems reading your tcpdump.pcap file
with my version of argus, so I can't reproduce a fault.

% thoth:Data carter$ argus -r tcpdump*pcap -w - | racount
racount   records     total_pkts     src_pkts       dst_pkts       total_bytes        src_bytes          dst_bytes
    sum   402665      9999999        5205934        4794065        4795152829         2664296730         2130856099

Is there a specific feature or command line option that generates
your problem?

Carter

On Aug 3, 2013, at 2:23 PM, Carter Bullard <carter at qosient.com<mailto:carter at qosient.com>> wrote:

OK, with the pcap we'll figure it out.

So the ssh keystroke algorithm is round trip sensitive, and its tuned for the enterprise border viewing, but there are a lot of knobs that can be turned.  The real trick is having, again, a packet file of a session so we can see what the algorithm is doing.

Grab a few and we can go over it packet for packet.

Carter

Carter Bullard, QoSient, LLC
150 E. 57th Street Suite 12D
New York, New York 10022
+1 212 588-9133 Phone
+1 212 588-9134 Fax

On Aug 2, 2013, at 3:06 PM, Craig Merchant <cmerchant at responsys.com<mailto:cmerchant at responsys.com>> wrote:
I don't know what to tell you, Carter.  The version of 3.0.7.4 that I'm running has the same MD5 sum as the latest in qosient.com/dev<http://qosient.com/dev>...

I've uploaded the pcap file I'm trying to convert to your FTP server.

I've attached the debug file, but after further testing I think it's an algorithm configuration issue.  I've tried testing normal and reverse keystroke detection between hosts that were in the same data center and dnstroke and snstroke always show up as "0,0" or ",," (the latter happens more when there are directional issues).  But if I watch a host that I ssh into over the VPN from my home connection, Argus detects keystrokes.

I've tried reading through the academic paper you guys published on the keystroke detection and it's beyond me.  If it works for a slower network connection and not a faster network connection (or maybe I should say lower/higher latency connection), which configuration options should I experiment with to find the right balance?

Thanks.

Craig

From: Carter Bullard [mailto:carter at qosient.com]
Sent: Friday, August 02, 2013 8:37 AM
To: Craig Merchant
Cc: Argus (argus-info at lists.andrew.cmu.edu<mailto:argus-info at lists.andrew.cmu.edu>)
Subject: Re: [ARGUS] Couple things...

Hey Craig,
Was in Calif all last week, and just now catching up.

I really think the argus crashing issue is fixed.  At least
it works with all data that has been uploaded.  But if you have
packet data that is blowing argus up, can you send ???

There is a possibility that you may not have the most recent
version of argus-3.0.7.4.  I sometimes put up new software
without changing the number, like if I make a mistake and
put up the wrong version.  So, there could be a race condition.
Check the md5 or date times, or just grab again, if there is
any doubt.

You have to turn on keystroke detection, so, don't comment out
the ARGUS_KEYSTROKE="yes" line.  The CONF line you can comment
out.

To troubleshoot the keystroke algorithm, with argus running, but
not as a daemon, you can send a USR1 signal to it,

   # kill -USR1 argus.pid

and it will print out stats that include the keystroke algorithm
configuration, if its turned on. When you send a USR1 signal to
argus, you increment the Debug flag setting for all of argus, and
so you should start getting debug messages, if the debug facility
is compiled in. Send another USR1 and you'll increase the debug
information.  Most of the per packet keystroke debugging is at
debug level 5.

Send a USR2 signal to argus ( # kill -USR2 argus.pid ) to turn
debug reporting off.

Carter

On Aug 1, 2013, at 7:02 PM, Craig Merchant <cmerchant at responsys.com<mailto:cmerchant at responsys.com>> wrote:

Hey, Carter...

I just wanted to check in and see if you anything else from me on the labeling issue or argus crashing when trying to convert a pcap file.  Let me know...

I'm also having some issues with keystroke detection with the latest release.  The following command used to work in my testing:

/usr/local/bin/ra -S 10.10.10.10:561 -n -u -c "," -s "+0dnstroke,+1snstroke" - host 10.1.1.1 and host 10.1.1.2

I tried both a normal and reverse SSH session between the two hosts and neither one registered keyboard strokes of varying speeds and intensity.

All I've done is commented out the defaults in argus.conf:

ARGUS_KEYSTROKE="yes"
ARGUS_KEYSTROKE_CONF="GPC_MAX=4"

I performed pretty much the same testing a couple months ago and got plenty of flows where keystrokes were detected.  Please let me know what you'd recommend for troubleshooting that.

Thanks.

Craig

<debug.zip>

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