Knock is a Python-based subdomain enumeration tool that discovers subdomains of a target domain through DNS queries and HTTP requests.
The tool addresses the problem of identifying all subdomains associated with a domain, which is a critical reconnaissance step in security assessments and bug bounty work. Knock operates by querying DNS records and making HTTP requests to validate discovered subdomains, building a comprehensive map of a target's subdomain infrastructure. The approach combines multiple discovery methods to increase coverage and accuracy of results.
Knock suits security researchers, penetration testers, and bug bounty hunters who need to perform initial reconnaissance on target domains. It is particularly useful for those conducting comprehensive subdomain enumeration as part of vulnerability assessment workflows. The tool is designed for command-line usage and integrates into security testing pipelines where subdomain discovery is a prerequisite for further analysis.
The project shows consistent maintenance with regular updates addressing functionality and reliability. Development activity demonstrates ongoing refinement of the enumeration capabilities and bug fixes that improve the tool's effectiveness in discovering subdomains across different target environments.
