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<o:p></o:p><o:p></o:p><span lang="EN-US">Dear RIPE NCC Services-WG,<o:p></o:p></span>
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<p class="MsoNormal"><span lang="EN-US">please have a look at a
new proposal:<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:18.0pt"><u><span
lang="EN-US">Purpose: optimize
<span style="color:black">R</span>everse-DNS operations<o:p></o:p></span></u></p>
<p class="MsoListParagraph"
style="text-indent:-18.0pt;mso-list:l0 level1 lfo2"><!--[if !supportLists]--><span
lang="EN-US"><span style="mso-list:Ignore">1.<span
style="font:7.0pt "Times New Roman"">��� </span></span></span><!--[endif]--><span
lang="EN-US">Assumption: There is a ton of negative
reverse-DNS replies (no PTR-record<span style="color:black">/NXDOMAIN</span>)
returned from the RIPE NCC rev-DNS-Servers, for all
not-yet-delegated address-blocks they are responsible for <span
style="color:black">(also called �lame� delegations ?).</span><o:p></o:p></span></p>
<p class="MsoListParagraph"
style="text-indent:-18.0pt;mso-list:l0 level1 lfo2"><!--[if !supportLists]--><span
lang="EN-US"><span style="mso-list:Ignore">2.<span
style="font:7.0pt "Times New Roman"">� </span></span></span><span
lang="EN-US">Question: How could this be optimized or at
least encouraged to be fixed? <br>
</span></p>
<p class="MsoListParagraph"
style="text-indent:-18.0pt;mso-list:l0 level1 lfo2"><span
lang="EN-US">Proposal: The RIPE NCC ops starts collecting
statistics per member/LIR account of negative reverse-DNS
queries for a respective address block (which is not yet
delegated)
and reports those statistics optionally to the LIRs, </span><span
lang="EN-US"><span style="mso-list:Ignore"><span
style="font:7.0pt "Times New Roman""></span></span></span><span
lang="EN-US">sorted by amount (i.e. top10 or top20 list in a
fixed interval - say 1/month).</span></p>
<p class="MsoListParagraph"
style="text-indent:-18.0pt;mso-list:l0 level1 lfo2"><span
lang="EN-US">There should be NO information about WHO
requested rev-DNS values or when. Just a simple, aggregated
summary of top requested addresses/blocks.<o:p></o:p></span>
</p>
<p class="MsoListParagraph"
style="text-indent:-18.0pt;mso-list:l0 level1 lfo2"><!--[if !supportLists]--><span
lang="EN-US"><span style="mso-list:Ignore">3.<span
style="font:7.0pt "Times New Roman"">������
</span></span></span><!--[endif]--><span lang="EN-US">In
case a member opts-in to view such statistics, one could
decide to actively reply to such reverse-DNS requests and
instead offer �good results� for requests, the address
owners would never would see.<o:p></o:p></span></p>
<p class="MsoListParagraph"
style="text-indent:-18.0pt;mso-list:l0 level1 lfo2"><!--[if !supportLists]--><span
lang="EN-US"><span style="mso-list:Ignore">4.<span
style="font:7.0pt "Times New Roman"">������
</span></span></span><!--[endif]--><span lang="EN-US">As a
result: better performance, less errors through better
infomation for RIR-members.<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">I propose to run a test
with a given address-block, which are not yet
reverse-delegated and check if this approach is feasable, or
where breakpoints might be, if this needs to work at a
larger scale (across all rev-DNS Servers, operated by RIPE
NCC for many members ideally).<o:p></o:p></span></p>
Best regards,</div>
<div class="WordSection1">Kurt Kayser<br>
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