## page was renamed from DNS/1/EDNS/DNS-flag-day = DNS/EDNS/DNS-flag-day = <> <> DNSソフトウェアが複雑になってしまったので、少しでも削りたいということのようです。  実際に効果・影響がでるかは分っていないのではないか。 EDNSが問題ということではないだろうに。 [[DNS/Camel]] [[/workarounds]] をやめるとのアナウンスだ。 DNS全体の見直しにつながることを期待しよう。DNSSECは捨てないだろうけど。-- ToshinoriMaeno <> https://indico.dns-oarc.net/event/29/contributions/662/attachments/634/1063/EDNS_Flag_Day_-_OARC29.pdf [[attachment:Screenshot from 2018-11-24 11-00-28.png]] [[/afnic]] [[/JPRS]] https://blog.thousandeyes.com/surviving-dns-flag-day ?utm_source=Marketo&utm_medium=Email&utm_campaign=NA_Q1FY20_All_All_Blog_BlogPost02012019&mkt_tok=eyJpIjoiTlRZeU5UQm1aREl6TXpJMSIsInQiOiJYdEtLT3FSOUhrWXB0eGNrTkNvODRkNkJtRlJcL0l5a1BMVkJoTFZNTE84OFJvaitHWFhaSHh2VDg0RFNZdVliaUlEZUJOQ1BTODZIT1B2TCtUenN2c1Q3VzlCT1dcL3RZZkQ4dDlRUnkxS05cL3k3TnJmblhvTVBNNEpmSURRNWVlUyJ9 == EDNSつきqueryに返事が返らない == ふたつの理由があげられている。 * broken DNS software * broken firewall configuration buffer size を大きくするのは筋違い。  いじるなら、512に設定しよう。 == tweet == https://twitter.com/secastro/status/1051452509552877574 Sebastian Castro @secastro (me) from @InternetNZ presented "DNS Flag day: A tale of five ccTLDs” https://indico.dns-oarc.net/event/29/contributions/662/attachments/634/1063/EDNS_Flag_Day_-_OARC29.pdf … #OARC29 21:39 - 2018年10月14日 https://indico.dns-oarc.net/event/29/contributions/644/attachments/632/1018/edns.pdf == flag day ==   https://blog.powerdns.com/2018/03/22/the-dns-camel-or-the-rise-in-dns-complexit/ https://dnsflagday.net To remediate these problems, vendors of DNS software BIND (ISC), Knot Resolver (CZ.NIC), PowerDNS, and Unbound (NLnet Labs) are going to remove certain workarounds on February 1st, 2019. [[/workarounds]] https://lists.dns-oarc.net/pipermail/dns-operations/2018-May/017643.html [dns-operations] Announcement - DNS flag day on 2019-02-01 Petr Špaček @ CZ.NIC CZ.NICにもいろんなひとがいるものだ。 https://lists.dns-oarc.net/pipermail/dns-operations/2018-May/017649.html I think this is fair to say that we @ AWS are aware that we do not respond with BADVERS to EDNS1 requests, but we are not seeing any clear customer benefit in fixing this in the next few months. https://lists.dns-oarc.net/pipermail/dns-operations/2018-May/017650.html  The changes made to define the behaviour for unknown EDNS options was significant enough that a version bump was warranted. AWS has had years to fix this. Yes, you were informed that EDNS(1) handling was broken years ago. https://lists.dns-oarc.net/pipermail/dns-operations/2018-May/017651.html おかしな問合せにすべて返事を返す必要があるのだろうか。  RFCにどう規定されていても、義務だと解釈すべきなのだろうか。   守らなければ、正当な扱いを受けられないことがあることは承知での行動だったら? -- ToshinoriMaeno <> Interview with Hugo Salgado (.CL): DNS Flag Day https://lactld.org/en/novedades/interview-hugo-salgado-cl-dns-flag-day