The Hunt for Hidden Domains: A Beginner’s Guide to Subfinder and 10 Subdomain Discovery Tools for…
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Summary
A subdomain is a section of a larger domain name in the DNS hierarchy and is commonly used to organise different elements of a website.
Examples given in the article include blog.rative.com and uk.example.com, with blog being the subdomain of rative.com and uk being the subdomain of example.com.
Subdomains are useful for SEO and online marketing to target specific geographical areas and particular pages on a website.
Enumeration of subdomains can make the user visible to vulnerabilities in servers and applications, making it a key part of the reconnaissance phase when conducting a penetration test.
A number of tools exist to help discover subdomains, including Subfinder and 10 Windows-based tools.