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<div class=Section1>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>No problem at all. Just a notice; I am running the script every
5 seconds so the log will include duplicate IP-adresses... Second, since
iptables áre working now, all other IPs are just blocked (not shown here).<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Log: <a href="http://riverhosting.nl/includes/02-24-2012.log">http://riverhosting.nl/includes/02-24-2012.log</a><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<div>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Met vriendelijke groeten,<br>
<br>
Julian Maartens<br>
River Hosting<br>
<br>
</span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:gray'><a href="mailto:info@riverhosting.nl"><span style='color:gray;
text-decoration:none'>info@riverhosting.nl</span></a></span><span
style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#A6A6A6'><br>
</span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:gray'><a href="http://www.riverhosting.nl/"><span style='color:gray;
text-decoration:none'>http://www.riverhosting.nl</span></a></span><span
style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#A6A6A6'><o:p></o:p></span></p>
</div>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:windowtext'>Van:</span></b><span style='font-size:10.0pt;font-family:
"Tahoma","sans-serif";color:windowtext'> Boyd G. Gafford Ph.D.
[mailto:drboyd@westportresearch.com] <br>
<b>Verzonden:</b> vrijdag 24 februari 2012 23:27<br>
<b>Aan:</b> Call of Duty server admin list.<br>
<b>Onderwerp:</b> Re: [cod] CoD2 UDP flood<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>That's good news! I would love to see ServerArk's log
for the past 24/48 hours, would you mind posting it? It should show what
IP's have been detected as flood attacks and blocked.<br>
<br>
:)<br>
<br>
Thanks,<br>
<br>
<i> Boyd</i><br>
<br>
<br>
On 02/24/2012 03:38 PM, River Hosting wrote: <o:p></o:p></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Hello again guys,</span><o:p></o:p></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'> </span><o:p></o:p></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>I was adding some new rules into the firewall and it looks like
the flooding has stopped!</span><o:p></o:p></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'> </span><o:p></o:p></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Now using;</span><o:p></o:p></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>- <i>serverark</i> (recently posted on this list)</span><o:p></o:p></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>- <i>getstatus_ban.sh</i> (recently posted aswell)</span><o:p></o:p></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>- <i>iptables</i></span><o:p></o:p></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'> </span><o:p></o:p></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Since this morning the traffic dropped from 6 Mbit/s to 45 Kb/s.</span><o:p></o:p></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>When filtering, shutting down all gameservers running on your
box for about 24-48 hours may do the trick. After that time just reboot them
and let the magic happen... :)</span><o:p></o:p></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'> </span><o:p></o:p></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'> </span><o:p></o:p></p>
<div>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Met vriendelijke groeten,</span><o:p></o:p></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>With kind regards,<br>
<br>
Julian Maartens<br>
River Hosting<br>
<br>
</span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:gray'><a href="mailto:info@riverhosting.nl"><span style='color:gray;
text-decoration:none'>info@riverhosting.nl</span></a></span><span
style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#A6A6A6'><br>
</span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:gray'><a href="http://www.riverhosting.nl/"><span style='color:gray;
text-decoration:none'>http://www.riverhosting.nl</span></a></span><o:p></o:p></p>
</div>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'> </span><o:p></o:p></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:windowtext'>Van:</span></b><span style='font-size:10.0pt;font-family:
"Tahoma","sans-serif";color:windowtext'> Marco Padovan [<a
href="mailto:evcz@evcz.tk">mailto:evcz@evcz.tk</a>] <br>
<b>Verzonden:</b> vrijdag 24 februari 2012 14:05<br>
<b>Aan:</b> Call of Duty server admin list.<br>
<b>Onderwerp:</b> Re: [cod] CoD2 UDP flood</span><o:p></o:p></p>
</div>
</div>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>You
can either use the one you linked from modsrepository or the more "complex"
one that was posted on this list</span><br>
<br>
Il 24/02/2012 14:03, <a href="mailto:david.lauriou@wanadoo.fr">david.lauriou@wanadoo.fr</a>
ha scritto: <o:p></o:p></p>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>the
rules is ?</span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> <o:p></o:p></p>
</div>
<blockquote style='border:none;border-left:solid black 1.5pt;padding:0cm 0cm 0cm 4.0pt;
margin-left:3.75pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt'>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>-----
Original Message ----- </span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal style='background:#E4E4E4'><b><span style='font-size:10.0pt;
font-family:"Arial","sans-serif"'>From:</span></b><span style='font-size:10.0pt;
font-family:"Arial","sans-serif"'> <a href="mailto:evcz@evcz.tk"
title="evcz@evcz.tk">Marco Padovan</a> </span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>To:</span></b><span
style='font-size:10.0pt;font-family:"Arial","sans-serif"'> <a
href="mailto:cod@icculus.org" title="cod@icculus.org">cod@icculus.org</a> </span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Sent:</span></b><span
style='font-size:10.0pt;font-family:"Arial","sans-serif"'> Friday, February 24,
2012 2:00 PM</span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Subject:</span></b><span
style='font-size:10.0pt;font-family:"Arial","sans-serif"'> Re: [cod] CoD2 UDP
flood</span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> <o:p></o:p></p>
</div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>that
rule is very basic.<br>
<br>
cod1, cod1.5, cod2 and cod4 all suffer the same problem and are exploited in
the same exact way.<br>
<br>
So an iptables that fixes the cod4 problem works also for cod2 and cod1<br>
</span><br>
Il 24/02/2012 13:51, <a href="mailto:david.lauriou@wanadoo.fr">david.lauriou@wanadoo.fr</a>
ha scritto: <o:p></o:p></p>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>i've
find this : <a
href="http://wiki.modsrepository.com/index.php/Call_of_Duty_4:_Servers">http://wiki.modsrepository.com/index.php/Call_of_Duty_4:_Servers</a><br>
<br>
its for cod4 not for COD2 !</span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> <o:p></o:p></p>
</div>
<blockquote style='border:none;border-left:solid black 1.5pt;padding:0cm 0cm 0cm 4.0pt;
margin-left:3.75pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt'>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>-----
Original Message ----- </span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal style='background:#E4E4E4'><b><span style='font-size:10.0pt;
font-family:"Arial","sans-serif"'>From:</span></b><span style='font-size:10.0pt;
font-family:"Arial","sans-serif"'> <a href="mailto:evcz@evcz.tk"
title="evcz@evcz.tk">Marco Padovan</a> </span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>To:</span></b><span
style='font-size:10.0pt;font-family:"Arial","sans-serif"'> <a
href="mailto:cod@icculus.org" title="cod@icculus.org">cod@icculus.org</a> </span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Sent:</span></b><span
style='font-size:10.0pt;font-family:"Arial","sans-serif"'> Friday, February 24,
2012 1:49 PM</span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Subject:</span></b><span
style='font-size:10.0pt;font-family:"Arial","sans-serif"'> Re: [cod] CoD2 UDP
flood</span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> <o:p></o:p></p>
</div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>NO!<br>
<br>
Read the messages that got posted in the last 2 days...<br>
<br>
This should be a proper ruleset:<br>
</span><a href="http://icculus.org/pipermail/cod/2012-February/015927.html">http://icculus.org/pipermail/cod/2012-February/015927.html</a><br>
<br>
Il 24/02/2012 13:47, <a href="mailto:david.lauriou@wanadoo.fr">david.lauriou@wanadoo.fr</a>
ha scritto: <o:p></o:p></p>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>like
this ?</span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> <o:p></o:p></p>
</div>
<div><pre>IPTABLES -A INPUT -p UDP -m length --length 42 -m recent --set --name getstatus_cod<o:p></o:p></pre><pre>IPTABLES -A INPUT -p UDP -m string --algo bm --string "getstatus" -m recent --update --seconds 1 --hitcount 20 --name getstatus_cod -j DROP<o:p></o:p></pre></div>
<blockquote style='border:none;border-left:solid black 1.5pt;padding:0cm 0cm 0cm 4.0pt;
margin-left:3.75pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt'>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>-----
Original Message ----- </span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal style='background:#E4E4E4'><b><span style='font-size:10.0pt;
font-family:"Arial","sans-serif"'>From:</span></b><span style='font-size:10.0pt;
font-family:"Arial","sans-serif"'> <a href="mailto:evcz@evcz.tk"
title="evcz@evcz.tk">Marco Padovan</a> </span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>To:</span></b><span
style='font-size:10.0pt;font-family:"Arial","sans-serif"'> <a
href="mailto:cod@icculus.org" title="cod@icculus.org">Call of Duty server admin
list.</a> </span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Sent:</span></b><span
style='font-size:10.0pt;font-family:"Arial","sans-serif"'> Friday, February 24,
2012 1:35 PM</span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Subject:</span></b><span
style='font-size:10.0pt;font-family:"Arial","sans-serif"'> Re: [cod] CoD2 UDP
flood</span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> <o:p></o:p></p>
</div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>iptables
rules</span><br>
<br>
Il 24/02/2012 13:28, <a href="mailto:david.lauriou@wanadoo.fr">david.lauriou@wanadoo.fr</a>
ha scritto: <o:p></o:p></p>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>for
COD4 what is the best method to remove udp Flooding exploit ?</span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> <o:p></o:p></p>
</div>
<blockquote style='border:none;border-left:solid black 1.5pt;padding:0cm 0cm 0cm 4.0pt;
margin-left:3.75pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt'>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>-----
Original Message ----- </span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal style='background:#E4E4E4'><b><span style='font-size:10.0pt;
font-family:"Arial","sans-serif"'>From:</span></b><span style='font-size:10.0pt;
font-family:"Arial","sans-serif"'> <a href="mailto:evcz@evcz.tk"
title="evcz@evcz.tk">Marco Padovan</a> </span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>To:</span></b><span
style='font-size:10.0pt;font-family:"Arial","sans-serif"'> <a
href="mailto:cod@icculus.org" title="cod@icculus.org">Call of Duty server admin
list.</a> </span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Sent:</span></b><span
style='font-size:10.0pt;font-family:"Arial","sans-serif"'> Friday, February 24,
2012 12:10 PM</span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Subject:</span></b><span
style='font-size:10.0pt;font-family:"Arial","sans-serif"'> Re: [cod] CoD2 UDP
flood</span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> <o:p></o:p></p>
</div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>Be
aware that there are two different ways to talk about offset: packet offset
(includes header) and payload offset</span> (does not include header)<br>
<br>
Il 24/02/2012 10:41, Geoff Goas ha scritto: <o:p></o:p></p>
<p class=MsoNormal style='margin-bottom:12.0pt'>You're right, and I see my
error. That is frustrating because I have no idea why it doesn't work with the
offset specified then.<o:p></o:p></p>
<div>
<p class=MsoNormal>On Fri, Feb 24, 2012 at 4:10 AM, Luca Farflame Fabbro <<a
href="mailto:farflame@cybergames.it">farflame@cybergames.it</a>> wrote:<o:p></o:p></p>
<div>
<div>
<p class=MsoNormal>Try this command<o:p></o:p></p>
</div>
<p class=MsoNormal>tcpdump -c 4 -nnvvvXS dst port 28960 <o:p></o:p></p>
<div>
<p class=MsoNormal>where port is the port that you want to monitor<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>should be something like<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> <o:p></o:p></p>
</div>
<div>
<div>
<p class=MsoNormal> 0x0000: 4500 002b 35b3
0000 7511 179b b612 80ad E..+5...u.......<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> 0x0010: c0a8 010c 7012
7120 0017 0000 ffff ffff ....p.q.........<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> 0x0020: 6765 7473 7461
7475 730a 0000 0000 getstatus.....<o:p></o:p></p>
</div>
</div>
<div>
<div>
<div>
<p class=MsoNormal> <o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>On Feb 24, 2012, at 9:54 AM, Geoff Goas wrote:<o:p></o:p></p>
</div>
<div>
<div>
<p class=MsoNormal><br>
<br>
<br>
<o:p></o:p></p>
<p class=MsoNormal style='margin-bottom:12.0pt'>That is strange, because if I
use those values, it does not work. If I use "--from 31" alone, then
it works. As soon as I change that to 32, it stops working. When I inspect the
packets in Wireshark, the "getstatus" string starts at offset 48 if
counting from 1. Would there be a way for iptables to print to log what it sees
in the specified offset range?<o:p></o:p></p>
<div>
<p class=MsoNormal>On Fri, Feb 24, 2012 at 3:28 AM, Luca Farflame Fabbro <<a
href="mailto:farflame@cybergames.it" target="_blank">farflame@cybergames.it</a>>
wrote:<o:p></o:p></p>
<div>
<p class=MsoNormal>It doesn't matter the length of the packet. <o:p></o:p></p>
<div>
<p class=MsoNormal>That rule will try to find the string "gestatus"
starting at position 32 bytes from start of packet and searching for it at
maximum at position 41.<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>The Q3 protocol for that command expects the string to be in
that range.<o:p></o:p></p>
<div>
<p class=MsoNormal> <o:p></o:p></p>
<div>
<div>
<div>
<p class=MsoNormal>On Feb 24, 2012, at 1:11 AM, Geoff Goas wrote:<o:p></o:p></p>
</div>
<p class=MsoNormal> <o:p></o:p></p>
</div>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'>
<div>
<p class=MsoNormal style='margin-bottom:12.0pt'>Is the offset range of 32-41
based on a 60-byte packet?<o:p></o:p></p>
<div>
<p class=MsoNormal>On Thu, Feb 23, 2012 at 10:34 AM, Marco Padovan <<a
href="mailto:evcz@evcz.tk" target="_blank">evcz@evcz.tk</a>> wrote:<o:p></o:p></p>
<div>
<p class=MsoNormal style='margin-bottom:12.0pt'>iptables -A INPUT -p udp -m
string --string "getstatus" --algo bm --from 32 --to 41 -j DROP<o:p></o:p></p>
</div>
</div>
</div>
<div>
<p class=MsoNormal>-- <br>
<b><i><span style='font-size:7.5pt;font-family:"Tahoma","sans-serif"'>Geoff
Goas<br>
Systems Engineer</span></i></b><br>
<br>
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</blockquote>
</div>
<p class=MsoNormal> <o:p></o:p></p>
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<p class=MsoNormal style='margin-bottom:12.0pt'><br>
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<p class=MsoNormal><br>
<br clear=all>
<br>
-- <br>
<b><i><span style='font-size:7.5pt;font-family:"Tahoma","sans-serif"'>Geoff
Goas<br>
Systems Engineer</span></i></b><br>
<br>
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<p class=MsoNormal> <o:p></o:p></p>
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<p class=MsoNormal><br>
<br clear=all>
<br>
-- <br>
<b><i><span style='font-size:7.5pt;font-family:"Tahoma","sans-serif"'>Geoff
Goas<br>
Systems Engineer</span></i></b><br>
<br>
<br>
<br>
<br>
<br>
<o:p></o:p></p>
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