beautiful-soup-4.readthedocs.io/en/latest/ https://github.com/requests/requests https://pentest-tools.com/information-gathering
参考资料 https://lazyhacker.medium.com/subdomain-enumeration-tec-276da39d7e69 https://0xffsec.com/handbook/information-gathering
q=%25.uber.com https://google.com/transparencyreport/https/ct/ https://pentest-tools.com/information-gathering
tools/subdomain-finder https://searchdns.netcraft.com/ https://detectify.com/ https://pentest-tools.com/information-gathering
Accessed: 2016-08-10. [2] Masscan the internet port scanner.http://tools.kali.org/information-gathering