lame delegation ?
- 存在しないゾーンについてのqueryに対してはREFUSEDも返さない。
DDoS Victims Top 50 of Today -- Wed May 17 13:01:03 JST 2023
643 caribbeanway.com. May 17 11:26:30 - May 17 13:00:50
$ dig -t ns caribbeanway.com @97.74.103.4 ;; communications error to 97.74.103.4#53: timed out ;; communications error to 97.74.103.4#53: timed out ;; communications error to 97.74.103.4#53: timed out ; <<>> DiG 9.18.12-0ubuntu0.22.04.1-Ubuntu <<>> -t ns caribbeanway.com @97.74.103.4 ;; global options: +cmd ;; no servers could be reached
1. whois
caribbeanway.com. 172800 IN NS ns07.domaincontrol.com. caribbeanway.com. 172800 IN NS ns08.domaincontrol.com. ;; ADDITIONAL SECTION: ns07.domaincontrol.com. 172800 IN AAAA 2603:5:2170::4 ns07.domaincontrol.com. 172800 IN A 97.74.103.4 ns08.domaincontrol.com. 172800 IN A 173.201.71.4
2. history
$ dig -t ns caribbeanway.com @97.74.103.4 ;; communications error to 97.74.103.4#53: timed out ;; communications error to 97.74.103.4#53: timed out ^Ctmaeno@maeno:~$ dig -t ns caribbeanway.com @173.201.71.4 ;; communications error to 173.201.71.4#53: timed out ;; communications error to 173.201.71.4#53: timed out ;; communications error to 173.201.71.4#53: timed out