Domain Name System Services, Support, Training
Documentation for Free DNS Tools
Automated DNS and DNSSEC Analysis and Monitoring
Professional DNSSEC Consulting and DNSSEC Services
DNSSEC Guide : Chapter 1. Introduction
DNSSEC Guide : Who May Not Want to Read this Guide?
DNSSEC Guide : What is DNSSEC?
DNSSEC Guide : What does DNSSEC Add to DNS?
DNSSEC Guide : How Does DNSSEC Change DNS Lookup?
DNSSEC Guide : Why is DNSSEC Important? (Why Should I Care?)
DNSSEC Guide : How does DNSSEC Change My Job as a DNS Administrator?
DNSSEC Guide : Chapter 2. Getting Started
DNSSEC Guide : Hardware Requirement
DNSSEC Guide : Network Requirements
DNSSEC Guide : Operational Requirements
DNSSEC Guide : Chapter 3. Validation
DNSSEC Guide : How To Test Recursive Server (So You Think You Are Validating)
DNSSEC Guide : Validation Easy Start Explained
DNSSEC Guide : What's EDNS All About (And Why Should I Care)?
DNSSEC Guide : Chapter 4. Signing
DNSSEC Guide : How To Test Authoritative Zones (So You Think You Are Signed)
DNSSEC Guide : Signing Easy Start Explained
DNSSEC Guide : Working with Parent Zone
DNSSEC Guide : Maintenance Tasks
DNSSEC Guide : Chapter 5. Basic Troubleshooting
DNSSEC Guide : Visible Symptoms
DNSSEC Guide : Common Problems
DNSSEC Guide : Negative Trust Anchors
DNSSEC Guide : NSEC3 Troubleshooting
DNSSEC Guide : Troubleshooting Example
DNSSEC Guide : Chapter 6. Advanced Discussions
DNSSEC Guide : Proof of Non-Existence (NSEC and NSEC3)
DNSSEC Guide : Disadvantages of DNSSEC
DNSSEC Guide : Chapter 7. Recipes
DNSSEC Guide : Rollover Recipes
DNSSEC Guide : NSEC and NSEC3 Recipes
DNSSEC Guide : Reverting to Unsigned Recipe
DNSSEC Guide : Self-signed Certificate Recipe
DNSSEC Guide : Chapter 8. Commonly Asked Questions
DNSSEC Guide : Acknowledgement
DNS Software Implementations (others)
Looking for DNS Hostmasters (security issues and DNS errors)
DNSSEC Report 2020-10 for Top 100 Banking Institutions
DNS Mistakes (Part 1): Missing or Added Trailing Dots
DNS Mistakes (Part 2): Lots of Typos
DNS over IPv6 Research 2020-11 for Fortune 500 Companies
DNS over IPv6 for India Domains Sample (2020-12)
TLD Delegation and Nameserver Failures (2020-09)
DNS Nameserver Counts for Top Million Websites (2020-08)
Responsible Vulnerability Disclosures
Analyzing Reverse Lookup Nameservers within AFRINIC (2021-01)
Running ancient 1990 BIND 4 on modern Internet
Russia Government Domains Analysis (2021-07)
ASN and Network Prefixes for TLD Nameservers (2021-10)
Summary of Audit of Top Ten Domains for Top TLDs (2021-10)
Summary of Analysis for Single Top Ranked Domain for Each TLD
DNSSEC Research for Largest 100 Banks (2022-12)
Analyzing OpenNIC DNS (2022-01)
Top Ten Most Frequent Test Failures (2022-04)
DNS over IPv6 for Czech Republic Domains (2024-02)
Hijacking registered domains (2024-08)
Finding out-of-sync TLD nameservers (2024-05)
Analyzing Internationalized (IDN) Country Code TLDs (2025-03)
Still serving expired domains (2025-04)
DNSSEC Report 2019-09 for Top 100 Banking Institutions
Query Times Report 2019-08 for Top 100 Banking Institutions
Query Times Report 2019-08 for Top 100 Banking Institutions
Potential Email Compromise via Dangling DNS MX
Unregistered Dangling DNS Targets under Provider Domains
Dangling MX Unregistered/NXDOMAIN
Dangling MX available for Resell
DNS over IPv6 Report 2019-10 for Fortune 500 (US) Companies
IPv6 Report 2020-06 for US Government and Military Domains
DNS Lame Delegations Report 2019-11
Professional Technical Support and Consulting for DNS
DNS and DNSSEC Training Classes
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