Security Incidents mailing list archives

Re: Weird Traffic


From: "Jonathan Adams" <keirre.adams () gmail com>
Date: Wed, 28 May 2008 05:18:44 -0400

Im on freeBSD, netstat doesnt like the -p without a parameter [protocol]

im familiar with pstree and lsof.. there's still no smoking guns

On Tue, May 27, 2008 at 5:31 PM, Michael Loftis <mloftis () wgops com> wrote:
if on linux -- the latter requires psmisc (or your dists equivalent)
installed....
netstat -anlp
pstree -cuap

lsof is another very useful utility.

nmap can only look for open listening and *responding* ports.  netstat -anlp
will show you whats open in the kernel, assuming you've not been rooted.

--On May 27, 2008 2:48:00 PM -0400 Jonathan Adams <keirre.adams () gmail com>
wrote:

I've not found the source of the majority of the data, but I have
found a huge amount of weird requests in my apache log, and I'm fairly
certain its http traffic...  I may cron of a protocol analysis tool
tonite to see if I can find more. I've run nmap scans, but stupidly
have not used the udp scan as someone else posted... nothing amiss in
the process list...

Theres no changes to my httpd.conf, and I dont see a big hit in my
disk space... dunno... it is a mystery.  I'll do some more analysis
and if I find anything Ill post it to the list

On 5/27/08, Pope <elpope () gmail com> wrote:

Hey Jonathan,

It might sound obvious, but exactly WHAT KIND OF TRAFFIC is being moved?

I mean, if it's just HTTP traffic, and you've transferred 2.7 GB in one
day, you should start thinking about what you are hosting. Sounds to me
like someone planted a file server in there without you noticing; could
be?

Find the content being transferred (warez, movies, porn... you can bet)
and remove it. End of the problem.

Regards


On Tue, May 27, 2008 at 1:59 PM, Jonathan Adams <keirre.adams () gmail com>
wrote:
All,

 I have a leased server I use to host some websites and for the past
week I have been getting traffic warnings. The server has been
transferring > 1GB of data per day, which is unusually high,
especially since I moved my mail to Google Apps. I have noticed a
ridiculous amount of attempted proxying attemptes in my logs, but I do
not have mod proxy turned on. I suspect my server is on some list.  I
firewalled off a large number of subnets from China and my traffic
dropped for a few days, then this morning, 2735MB transferred in 24
hrs.

 As of right now, I am planning to blackhole all China traffic, since
thats where most of this is comming from, along with the occasional
traffic from France and other places in Eur. Is this common?  If so
are there any other remedies?

--

"Strength does not come from physical capacity. It comes from an
indomitable will." -
Mohandas Gandhi




--
Pope
elpope # gmail ยท com

"You have been down there, Neo. You know that road. You know exactly
where it ends. And I know that's not where you want to be." [Trinity @
Matrix]



--
"Genius might be described as a supreme capacity for getting its possessors
into trouble of all kinds."
-- Samuel Butler




-- 
___________________________
Jon Adams

web: http://www.scis.nova.edu/~jonaadam
mail: keirre.adams () gmail com
---------------------------------------------

"Strength does not come from physical capacity. It comes from an
indomitable will." -
Mohandas Gandhi


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