[Durham] Automating a network sniffer

Richard Patterson Richard at helpquick.co.uk
Mon Nov 1 08:54:47 UTC 2010

Do you run Windows at all?

Do you have a Linux based gateway box, you could have a look at Snort, SnortSnarf and NTop

On my Linux firewall, I run squid with adzapper (filters out banners, adverts and malicious scripts, etc), which logs all requests anyway... You might want to look into this too...

Hope this helps


Richard Patterson
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-----Original Message-----
From: durham-bounces at mailman.lug.org.uk [mailto:durham-bounces at mailman.lug.org.uk] On Behalf Of Dougie Nisbet
Sent: 01 November 2010 08:44
To: Durham at mailman.lug.org.uk
Subject: [Durham] Automating a network sniffer

I've got a mystery. Abuse alerts from Zen suggesting a rootkit exploit. 
All my PCs are clean and I can't find anything amiss.

Abuse report:

For more information on this report please visit http://www.shadowserver.org/wiki/pmwiki.php/Services/Sinkhole-HTTP-Drone

Asn: 13037
Geo: UK
Url: GET / HTTP/1.1
Http_agent: Mozilla/5.0 (Windows; U; Windows NT 6.0; en-GB; rv: 
Gecko/20101012 Firefox/3.6.11 ( .NET CLR 3.5.30729; .NET4.0C)
Src_port: 26691
P0f_genre: Windows
P0f_detail: 2000 SP4, XP SP1+
Dst_port: 80
Dst_asn: 8560
Dst_geo: DE

How much of this is likely to be reliable? I don't run MS XP or 2000 for 

Anyway my question is; I'd like to set up a network sniffer on my LAN 
with a rotating logfile. A few days if possible. I've had a look at 
wireshark and thought it looked promising but I can't figure out how to 
configure it to run out of a cron job and to close its data file each 
day and re-open a new one. Would I be better looking at tcpdump or 
tshark? I realise that the volumes may make this unrealistic anyway but 
I think I could probably get a couple of day's worth in a logfile or 
two. Can anyone offer an off-the-shelf command line/cron job that might 
do it?



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