Cybersecurity Lab
DNS Enumeration Lab
A DNS-focused lab for understanding records, name resolution, and public infrastructure signals.
In Progress2026Beginner
Objective
Practice reading DNS records and explaining what each record type can reveal in a security review.
Tools Used
dignslookuphostDNS records
Steps Performed
- Queried A, AAAA, MX, TXT, and NS records.
- Compared output across multiple DNS tools.
- Documented record purpose and security relevance.
Key Findings
- TXT records can expose verification and mail security configuration.
- MX and NS records reveal important third-party service dependencies.
- DNS output must be interpreted carefully before drawing conclusions.
Screenshots
DNS query examples
Record comparison table
Notes summary
Lessons Learned
- DNS knowledge supports OSINT, troubleshooting, and vulnerability assessment.
- Simple tools can provide strong infrastructure context.
Future Improvements
- Add SPF, DKIM, and DMARC review notes.
- Create a DNS record glossary.
References
- Cloudflare DNS learning center
- RFC 1035