1. watchA
subdomain takeover の実例
2. whois
3. history
$ dig beta.denhaag.com ; <<>> DiG 9.16.1-Ubuntu <<>> beta.denhaag.com ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 12957 ;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 65494 ;; QUESTION SECTION: ;beta.denhaag.com. IN A ;; ANSWER SECTION: beta.denhaag.com. 823 IN CNAME site-denhaagcom.azurewebsites.net. site-denhaagcom.azurewebsites.net. 29 IN CNAME waws-prod-blu-203.sip.azurewebsites.windows.net. waws-prod-blu-203.sip.azurewebsites.windows.net. 256 IN CNAME waws-prod-blu-203-0b2c.eastus.cloudapp.azure.com. waws-prod-blu-203-0b2c.eastus.cloudapp.azure.com. 9 IN A 20.49.104.9 ;; Query time: 36 msec ;; SERVER: 127.0.0.53#53(127.0.0.53) ;; WHEN: 木 3月 25 17:09:50 JST 2021 ;; MSG SIZE rcvd: 225