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DNSGen is an open source DNS name permutation tool designed primarily for security researchers and penetration testers who need to discover potential subdomains during reconnaissance and attack surface mapping. It analyzes existing domain names and generates numerous intelligent variations that may represent valid subdomains within an organization’s infrastructure. These generated permutations help identify hidden or unlisted services that may not appear in standard DNS queries or public records. DNSGen applies multiple permutation techniques to create realistic domain combinations based on modern infrastructure naming patterns, including cloud environments, DevOps tools, and microservice architectures. It can also extract meaningful keywords from existing domain names and incorporate them into newly generated permutations. The resulting domain list can be further processed by DNS resolution tools such as MassDNS to determine which generated domains actually exist.
Features
- Smart domain name permutation engine that generates variations of input domains
- Fast generation mode for quicker reconnaissance assessments
- Support for custom wordlists with optional comments for organization
- Automatic extraction of meaningful words from existing domain names
- Multiple permutation techniques such as word insertion, affixing, and number manipulation
- Cloud-aware and modern infrastructure patterns for realistic subdomain generation
Project Samples
