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<p class="MsoNormal"><span lang="EN-US">Hi,</span><span lang="EN-US" style="mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I am trying to implement dynamic block rules in the dnsdist (1.6.0) with the basic following configuration<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">local dbr = dynBlockRulesGroup()<br>
dbr:setQueryRate(500, 20, "Exceeded query rate", 60)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">function maintenance()<br>
dbr:apply()<br>
end<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span class="gmail-jlqj4b"><span lang="EN">After some tests with a client sending 1000qps for more than 20 sec, I see that my dynamic rule is never triggered :(</span></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span class="gmail-jlqj4b"><span lang="EN">But if I change the maximum rate from 500 to 499 then the dynamic rule works fine.
</span></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span class="gmail-jlqj4b"><span lang="EN">I don't find anything in the documentation about this limitation, but after some investigation, my conclusion is that the "rate" argument of the setQueryRate function has a maximum value not to
be exceeded.</span></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">maxRate = (The maximum amount of queries in the ringbuffer / Number of seconds the rate has been exceeded) - 1<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Could you confirm that my understanding is correct?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">If yes , perhaps it will be nice to have some notes in documentation about that, or I just missed it ?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">By the way, many thanks for this great product!<o:p></o:p></span></p>
<p class="MsoNormal">denis<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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