<p dir="ltr" style="margin-top:0; margin-bottom:0;">There are different heuristics that you can apply to reduce the size of the search space. See Fernando Gont's work on the issue. </p>
<br>
<p dir="ltr" style="margin-top:0; margin-bottom:0;">However, there is no way to brute force scan even a single /64 in a reasonable amount of time. </p>
<br>
<p dir="ltr" style="margin-top:0; margin-bottom:0;">Here at LACNIC we've searching for open resolvers in IPv6, see https://labs.lacnic.net/Identificando-servidores-DNS-IPv6-Open-Resolvers/ (in Spanish , Google translate is your friend) </p>
<br>
<p dir="ltr" style="margin-top:0; margin-bottom:0;">Let me know if you have any questions about this work. </p>
<br>
<p dir="ltr" style="margin-top:0; margin-bottom:0;">Carlos</p>
<br>
<div id='cm_signature'> via <a href="https://cloudmagic.com/k/d/mailapp?ct=pa&cv=10.0.25&pv=9&source=email_footer_2">Newton Mail</a> </div><div class="cm_quote">On Sun, Nov 03, 2019 at 12:15pm, Malick K. ALASSANE <<a href="mailto:alkomalick@gmail.com">alkomalick@gmail.com</a>> wrote:</div><br><div id="oldcontent" style="background: rgb(255, 255, 255);"><blockquote style=""><div dir="ltr">My objective for this study is to detect open DNS resolvers in the AFRINIC IP space. <br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Le dim. 3 nov. 2019, à 16 h 05, JORDI PALET MARTINEZ via AfrIPv6-Discuss <<a href="mailto:afripv6-discuss@afrinic.net">afripv6-discuss@afrinic.net</a>> a écrit :<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div lang="ES"><div class="gmail-m_-8761156363855488064WordSection1"><p class="MsoNormal"><span lang="EN-US" style="font-size:12pt">Hi Malick,<u></u><u></u></span></p><p class="MsoNormal"><span lang="EN-US" style="font-size:12pt"><u></u> <u></u></span></p><p class="MsoNormal"><span lang="EN-US" style="font-size:12pt">That’s somehow, one of the “advantages” of IPv6, that make it much more difficult.<u></u><u></u></span></p><p class="MsoNormal"><span lang="EN-US" style="font-size:12pt"><u></u> <u></u></span></p><p class="MsoNormal"><span lang="EN-US" style="font-size:12pt">If the operators and end-users are doing a good work, they will not be assigning neither contiguous prefixes, neither contiguous prefixes/LANs, neither contiguous hosts!<u></u><u></u></span></p><p class="MsoNormal"><span lang="EN-US" style="font-size:12pt"><u></u> <u></u></span></p><p class="MsoNormal"><span lang="EN-US" style="font-size:12pt">May be if you explain a bit more what you’re trying to achieve, we can give some ideas.<u></u><u></u></span></p><div><p class="MsoNormal"><span lang="EN-US" style="font-size:12pt;color:black"><u></u> <u></u></span></p><p class="MsoNormal"><span lang="EN-US" style="font-size:12pt;color:black">Regards,<u></u><u></u></span></p><p class="MsoNormal" style="margin-bottom:12pt"><span lang="EN-US" style="font-size:12pt;color:black">Jordi<u></u><u></u></span></p><p class="MsoNormal" style="margin-bottom:12pt"><span lang="EN-US" style="font-size:12pt;color:black">@jordipalet<u></u><u></u></span></p><p class="MsoNormal" style="margin-bottom:12pt"><span lang="EN-US" style="font-size:12pt;color:black"><u></u> <u></u></span></p></div><p class="MsoNormal"><span lang="EN-US" style="font-size:12pt"><u></u> <u></u></span></p><p class="MsoNormal"><span lang="EN-US" style="font-size:12pt"><u></u> <u></u></span></p><div><div><p class="MsoNormal" style="margin-left:35.4pt">El 3/11/19 15:57, "Malick K. ALASSANE" <<a href="mailto:alkomalick@gmail.com" target="_blank">alkomalick@gmail.com</a>> escribió:<u></u><u></u></p></div></div><div><p class="MsoNormal" style="margin-left:35.4pt"><u></u> <u></u></p></div><div><p class="MsoNormal" style="margin-left:35.4pt">Good morning, everyone!<br>I'm doing a study on afrinic's IP address blocks. I didn't have any constraints with ipv4 address blocks. The use of the zmap tool allowed me to do a quick scan on all available IPV4 addresses. Unfortunately, i don't know how to scan IPV6 blocks without taking a long time. Nmap, can help me, but it could take several years to finish. Zmap or Masscan don't support ipv6. <u></u><u></u></p><div><p class="MsoNormal" style="margin-left:35.4pt">I would like to know if anyone has a solution to quickly scan ipv6 address blocks to identify ipv6 servers that offer a service.<u></u><u></u></p></div><div><p class="MsoNormal" style="margin-left:35.4pt"><u></u> <u></u></p></div><div><p class="MsoNormal" style="margin-left:35.4pt">Thanks for your help!<u></u><u></u></p></div></div><p class="MsoNormal" style="margin-left:35.4pt">_______________________________________________ AfrIPv6-Discuss mailing list <a href="mailto:AfrIPv6-Discuss@afrinic.net" target="_blank">AfrIPv6-Discuss@afrinic.net</a> <a href="https://lists.afrinic.net/mailman/listinfo/afripv6-discuss" target="_blank">https://lists.afrinic.net/mailman/listinfo/afripv6-discuss</a> <u></u><u></u></p></div><br>**********************************************<br>
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