From: ads nat <adsnat@yahoo.com>
To: Chris Brenton <cbrenton@chrisbrenton.org>
Cc: netfilter@lists.netfilter.org
Subject: Re: Unwanted Uploading.
Date: Sat, 6 Sep 2003 21:16:53 -0700 (PDT) [thread overview]
Message-ID: <20030907041653.11017.qmail@web20706.mail.yahoo.com> (raw)
In-Reply-To: <3F5A0DAD.7020901@chrisbrenton.org>
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Hi,
By giving command "tcpdump -v -nn icmp"
I get follwoing :
*****
09:31:38.307409 202.63.164.12 > 202.183.69.130: icmp: echo request (DF) (ttl 58,
id 0, len 84)
09:31:39.308771 202.63.164.12 > 202.183.69.130: icmp: echo request (DF) (ttl 58,
id 0, len 84)
09:31:40.310974 202.63.164.12 > 202.183.69.130: icmp: echo request (DF) (ttl 58,
id 0, len 84)
09:31:41.312619 202.63.164.12 > 202.183.69.130: icmp: echo request (DF) (ttl 58,
id 0, len 84)
09:31:42.314766 202.63.164.12 > 202.183.69.130: icmp: echo request (DF) (ttl 58,
id 0, len 84)
09:36:38.961942 202.63.164.12 > 202.183.69.130: icmp: echo request (DF) (ttl 58,
id 0, len 84)
09:36:39.964662 202.63.164.12 > 202.183.69.130: icmp: echo request (DF) (ttl 58,
id 0, len 84)
09:36:40.967854 202.63.164.12 > 202.183.69.130: icmp: echo request (DF) (ttl 58,
id 0, len 84)
09:36:41.969910 202.63.164.12 > 202.183.69.130: icmp: echo request (DF) (ttl 58,
id 0, len 84)
09:36:42.978050 202.63.164.12 > 202.183.69.130: icmp: echo request (DF) (ttl 58,
id 0, len 84)
******
My Server ethrenet external ID is 202.183.69.130
How to go ahead.
Thanks
Chris Brenton <cbrenton@chrisbrenton.org> wrote:
ads nat wrote:
>
> When talked with users user says their is no extar ordinary
> increase in uploading or downloading. My ISP say there must be some
> virus/worm in the network.
Sounds like you are one of the sites flooding people with icmp :(
Try this:
tcpdump -v -nn icmp
Look at the source IP's of the echo-request packets and fix your systems.
If that does not help, try a tool like ntop or iptraf which will tell
you who is generating all the traffic.
HTH,
C
---------------------------------
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next prev parent reply other threads:[~2003-09-07 4:16 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-09-06 15:31 Unwanted Uploading ads nat
2003-09-06 15:36 ` ads nat
2003-09-06 16:39 ` Chris Brenton
2003-09-07 4:16 ` ads nat [this message]
2003-09-07 11:22 ` Chris Brenton
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