GSDF
A Python tool that queries Google's SSL transparency report to discover subdomains and identify expired certificates.
What is GSDF?
GoogleSSLdomainFinder (GSDF) is a Python-based security tool that queries Google's SSL certificate transparency report to discover subdomains associated with a target domain. It helps identify potential attack surfaces by revealing subdomains that have issued SSL certificates, including those with expired certificates that may indicate neglected services. The tool outputs results in a terminal table and saves them to a file for further analysis.
Security researchers, penetration testers, and network administrators who need to perform subdomain enumeration as part of reconnaissance or vulnerability assessment workflows.
GSDF provides a lightweight, scriptable alternative to commercial subdomain discovery tools by leveraging free, public certificate transparency data from Google. Its ability to detect expired certificates adds unique value for identifying potentially vulnerable or forgotten subdomains.
Overview
A domain searcher named GoogleSSLdomainFinder - 基于谷歌SSL透明证书的子域名查询工具
Use Cases
Best For
- Performing subdomain enumeration during penetration testing engagements
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