1. 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。

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 2018-07-25 22:57:36

https://indico.dns-oarc.net/event/29/contributions/662/attachments/634/1063/EDNS_Flag_Day_-_OARC29.pdf

/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

1.1. 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。

buffer size を大きくするのは筋違い。

1.2. 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

1.3. flag day

https://dnsflagday.net

To remediate these problems, vendors of DNS software

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

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。

-- ToshinoriMaeno 2018-07-20 23:35:21

Interview with Hugo Salgado (.CL): DNS Flag Day https://lactld.org/en/novedades/interview-hugo-salgado-cl-dns-flag-day