Re: flow-portscan, pcap files, and timestamps..

[Chris Green <cmg () uab edu>]

Erik Fichtner <emf () servervault com> writes:

> Hi all.. I'm having a little issue with flow-portscan that's driving me
> bonkers...     See, I'm using an offline pcap file, and flow-portscan keeps
> reporting detected portscans with current time values, not the time that
> they actually happened based on the current time values from the pcap file.
>
> I took a quick look into flowps.c and it appears to be trying to use
> the packet timestamps, so I'm not entirely sure where it's deciding
> to get the wrong timestamp from, although I suspect somewhere along
> the output chain of GenerateSnortEvent() there's a shortcut someone
> took to call localtime() instead of keeping a running clock
> internally.  :(

It comes from when the alert function is called with a NULL packet.

If you use the pktkludge output mechanism, you should get real
timestamps though you will now have a much different problem to deal
with :)
-- 
Chris Green <cmg () dok org>
Warning: time of day goes back, taking countermeasures.




-------------------------------------------------------
This SF.Net email is sponsored by: IBM Linux Tutorials
Free Linux tutorial presented by Daniel Robbins, President and CEO of
GenToo technologies. Learn everything from fundamentals to system
administration.http://ads.osdn.com/?ad_id=1470&alloc_id=3638&op=click
_______________________________________________
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