DNS/1/security/cookies/返答について、ここに記述してください。

5. DNS Cookies Protocol Specification

5.1. Originating a Request

5.2. Responding to a Request

-- ToshinoriMaeno 2017-04-06 00:23:13

1. example

$ dig microsoft.com @ns1.msft.net

; <<>> DiG 9.11.0-P3 <<>> microsoft.com @ns1.msft.net
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: FORMERR, id: 35038
;; flags: qr aa rd; QUERY: 1, ANSWER: 5, AUTHORITY: 0, ADDITIONAL: 1
;; WARNING: recursion requested but not available

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1280
; COOKIE: 7cd9faea642d0270 (echoed)
;; QUESTION SECTION:
;microsoft.com.                 IN      A

;; ANSWER SECTION:
microsoft.com.          3600    IN      A       23.100.122.175
microsoft.com.          3600    IN      A       23.96.52.53
microsoft.com.          3600    IN      A       191.239.213.197
microsoft.com.          3600    IN      A       104.40.211.35
microsoft.com.          3600    IN      A       104.43.195.251

;; Query time: 6 msec
;; SERVER: 208.84.0.53#53(208.84.0.53)
;; WHEN: Fri Apr 07 10:12:12 JST 2017
;; MSG SIZE  rcvd: 134