Leon,
thx. Ill run the ntop when I get back home again. On the plus side,
the traffic is down today (I didnt get the automated threshold alert),
this happened the last time I added in FW rules, and by the next day I
had twice as much traffic as before I applied the new rules 1.3GB to
2.57 GB.
There is nothing in the syslog except the usual stuff
I did a find on the filesystem for files 5MB and over, came back
with nothing except a couple of log files and other expected stuff.
I still believe that some of the proxy requests are getting through,
the great majority of the real traffic in my tcpdump was HTTP... but I
think the data may be useless because that data was captured on a day
when I wasn't getting flooded. Will have to wait to see if/when the
problem returns and run another tcpdump session. Problem is compounded
by the fact that the server doesnt have X, so I'll need to copy off
the tcpdump output somewhere to analyze it - wasn't a problem
yesterday because it was only a couple of dozen MB.
I do need to run a rootkit detection tool on the box, it couldn't
hurt, Ill do that anyway, in the meantime I'll wait and see if the
traffic comes back up.
--J
On 5/29/08, Leon Ward <seclists@rm-rf.co.uk> wrote:
What was the result of ntop? protocol breakdowns, top IP SRC/DST etc.
Does syslog point you to anything suspicious?
chkrootkit ?
What do you use to audit your Apache logs? Does that show up anything
interesting (hosting a large file for download maybe).
Without physical access, it's hard to trust the output of tools you install.
-Leon
On 28 May 2008, at 10:20, Jonathan Adams wrote:
John,
I am running late for my real job :) but when i come back Ill run
some more test and post the results.
BTW, 1.5 GB transferred yesterday. there is no way this is valid web
or ftp traffic... something is proxying through my box...
Im sure of it
On Tue, May 27, 2008 at 11:06 PM, John Duksta <john@duksta.org> wrote:
Jonathan,
I'd be curious to get a copy of the list of networks that you're seeing
this
traffic from. I work for a large managed security service provider and I
could cross reference these networks against data that we're seeing from
our
corporate customers.
Regards,
-john
On May 27, 2008, at 7:59 AM, Jonathan Adams 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
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___________________________
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
