1. DNS/毒盛/AncillaryDataAttacks/titech.ac.jp

1.1. 委譲返答

以下のadditionl section は受け入れますか。-- ToshinoriMaeno 2020-06-20 12:46:22

%dig -t mx cc.titech.ac.jp @ns1.noc.titech.ac.jp                         ~/dnsq/tit

; <<>> DiG 9.12.1 <<>> -t mx cc.titech.ac.jp @ns1.noc.titech.ac.jp
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 3399
;; flags: qr; QUERY: 1, ANSWER: 0, AUTHORITY: 3, ADDITIONAL: 4

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;cc.titech.ac.jp.               IN      MX

;; AUTHORITY SECTION:
cc.titech.ac.jp.        3600    IN      NS      ns2.noc.titech.ac.jp.
cc.titech.ac.jp.        3600    IN      NS      dns-o.net.titech.ac.jp.
cc.titech.ac.jp.        3600    IN      NS      dns-s.net.titech.ac.jp.

;; ADDITIONAL SECTION:
ns2.noc.titech.ac.jp.   3600    IN      A       131.112.125.18
dns-o.net.titech.ac.jp. 900     IN      A       131.112.125.54
dns-s.net.titech.ac.jp. 900     IN      A       131.112.181.55

;; Query time: 7 msec
;; SERVER: 131.112.125.17#53(131.112.125.17)
;; WHEN: Sat Jun 20 21:46:58 JST 2020
;; MSG SIZE  rcvd: 158

1.2. 権威サーバーの返答

%dig -t mx cc.titech.ac.jp @ns2.noc.titech.ac.jp                         ~/dnsq/tit

; <<>> DiG 9.12.1 <<>> -t mx cc.titech.ac.jp @ns2.noc.titech.ac.jp
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 26198
;; flags: qr aa; QUERY: 1, ANSWER: 1, AUTHORITY: 3, ADDITIONAL: 4

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;cc.titech.ac.jp.               IN      MX

;; ANSWER SECTION:
cc.titech.ac.jp.        3600    IN      MX      10 filter.nap.gsic.titech.ac.jp.

;; AUTHORITY SECTION:
cc.titech.ac.jp.        3600    IN      NS      ns2.noc.titech.ac.jp.
cc.titech.ac.jp.        3600    IN      NS      dns-o.net.titech.ac.jp.
cc.titech.ac.jp.        3600    IN      NS      dns-s.net.titech.ac.jp.

;; ADDITIONAL SECTION:
ns2.noc.titech.ac.jp.   3600    IN      A       131.112.125.18
dns-o.net.titech.ac.jp. 900     IN      A       131.112.125.54
dns-s.net.titech.ac.jp. 900     IN      A       131.112.181.55

;; Query time: 6 msec
;; SERVER: 131.112.125.18#53(131.112.125.18)
;; WHEN: Sat Jun 20 21:42:38 JST 2020
;; MSG SIZE  rcvd: 190