subfinder:tldr:0f11a

The command subfinder -nW -d ${example-com} is used to scan for subdomains of the domain "${example-com}" using the tool called "subfinder".

Here is an explanation of the command and its components:

• subfinder: It refers to the executable file or command for the tool "subfinder", which is a subdomain discovery tool used to find subdomains associated with a given domain name.

• -nW: These are two command-line flags or options used with the "subfinder" tool.

  • The -n flag instructs "subfinder" to perform a passive subdomain enumeration. This means it will gather subdomains without sending any requests to the target's infrastructure directly.

  • The -W flag tells "subfinder" to skip wildcard DNS resolution. Wildcard DNS is a configuration that returns the same IP address for any subdomain that does not exist. By using this flag, "subfinder" will ignore such wildcard DNS configurations and focus on valid subdomains.

• -d ${example-com}: This is another command-line flag used to specify the domain name to target for subdomain scanning. ${example-com} represents a placeholder for the actual domain name. For example, if the domain to investigate is "example.com", you would replace ${example-com} with example.com.

Overall, the command is invoking the "subfinder" tool with the specified options to passively discover subdomains of the given domain while skipping wildcard DNS resolutions.