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<p>You can use iptables to rate-limit the IP.<br>
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<div class="moz-cite-prefix">On 7/26/2016 12:11 PM, Ejaz wrote:<br>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="color:black">All. <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:black">There is huge
traffic coming out from my DNS server since yesterday and
flooding the IP </span>212.107.121.110, though I have
increased the limitation of tcp-clients in named.conf but
still the issue. any help would be highly appreciate.<o:p></o:p></p>
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<p class="MsoNormal" style="border:none;padding:0in"><o:p> </o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">My bind version is <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">[root@ns10 ~]# named -v<o:p></o:p></p>
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<p class="MsoNormal" style="border:none;padding:0in">BIND
9.9.2-P1<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="border:none;padding:0in"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
<p class="MsoNormal">When checking there are several entries as
below. <o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Jul 26 10:53:26 ns10 named[3004]: client
212.107.121.110#4636: no more TCP clients: quota reached<o:p></o:p></p>
<p class="MsoNormal">quota reached<o:p></o:p></p>
<p class="MsoNormal">Jul 26 10:53:13 ns10 named[3004]: client
212.107.121.110#4571: no more TCP clients: quota reached<o:p></o:p></p>
<p class="MsoNormal">Jul 26 10:53:13 ns10 named[3004]: client
212.107.121.110#4572: no more TCP clients: quota reached<o:p></o:p></p>
<p class="MsoNormal">Jul 26 10:53:19 ns10 named[3004]: client
212.107.121.110#4597: no more TCP clients: quota reached<o:p></o:p></p>
<p class="MsoNormal">Jul 26 10:53:25 ns10 named[3004]: client
212.107.121.110#4633: no more TCP clients: quota reached<o:p></o:p></p>
<p class="MsoNormal">Jul 26 10:53:25 ns10 named[3004]: client
212.107.121.110#4635: no more TCP clients: quota reached<o:p></o:p></p>
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<p class="MsoNormal" style="border:none;padding:0in">Jul 26
10:53:26 ns10 named[3004]: client 212.107.121.110#4636: no
more TCP clients: quota reached<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks,<o:p></o:p></p>
<p class="MsoNormal">Mohammed Ejaz<o:p></o:p></p>
<p class="MsoNormal">Asst. Operation Director of Systems.<o:p></o:p></p>
<p class="MsoNormal">Cyberia SAUDI ARABIA<o:p></o:p></p>
<p class="MsoNormal">P.O.Box: 301079, Riyadh 11372<o:p></o:p></p>
<p class="MsoNormal">Phone: (+966) 11 464 7114 Ext. 140<o:p></o:p></p>
<p class="MsoNormal">Mobile: (+966) 562311787<o:p></o:p></p>
<p class="MsoNormal">Fax: (+966) 11 465 4735<o:p></o:p></p>
<p class="MsoNormal">Website: <a class="moz-txt-link-freetext" href="http://www.cyberia.net.sa">http://www.cyberia.net.sa</a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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